Silkworm Breeding
Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding Experiments: 1. Breeding Plan - I
Project Period :1963-1965
Objectives : Evolution of new suitable races which can replace Pure Mysore.
Results/Recommendations :
· The mass laboratory rearing has yielded very satisfactory results.
· The new race after field trials in CSR&TI was distributed in Maas and Mysore states. The results are satisfactory.
· The fundamental characters i.e., multivoltinism was 100%, the floss percentage varied from 2% to 5% and reelable length of filament varied from 700-900mts. The selected cocoons had filament measuring as much as 1000-1100mts.
· Two other promising sub lines having 100% multivoltinism were selected in Breeding Plan-I. Rearing data from 8th -13th generation, the sub line Kolar gold and Kollegal Jawan are showing superior values in all the qualitative and quantitative characters.
Source of Information : Annual Report:1964-65
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding Experiments: 2. Breeding Plan-II
3. Breeding Plan-III
Project Period :1963-1965
Objectives : To evolve a improved Mysore strain at the 1st and 2nd stage of back crossing.
Results/Recommendations :
· The sub line evolved did not give as remarkable results as those of Plan-I. So the Plan-II would be discontinued.
· Two yellow sub lines selected for future experiments did not give desirable results. So, this Plan-III is being dropped.
Source of Information : Annual Report:1964-65
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding Experiments: 4. Breeding Plan-IV
Project Period :1963-1965
Results/Recommendations :The shell percent varies from 13-14% and the length of filament is very low ranging from 400-500 mts. as multivoltinism is 100%. This will be crossed with a suitable race for obtaining other suitable and desirable characters.
Source of Information : Annual Report:1964-65
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on silk glands.
Project Period :1963-1964
Objectives :The development of silk glands in male and female larvae (Indigenous Mysore race and 2 exotic races (a Japanese and a Chinese race) fed on 3 varieties of mulberry (viz., Local, K2 and Kosen) were studied by taking larvae at random at the end of 5th stage and studying their gland development.
Results/Recommendations :The result indicated that with reference to the silk gland development, almost similar results have been obtained for all 3 varieties of mulberry leaves.
Source of Information : Annual Report:1963-64
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of superior multivoltine races- 'A' Plan.
Personnel : Jolly MS, Noamani MKR, Iyengar MNS, Magadum SB, Malavathy SN, Rama Mohan Rao P, Rajan RK
Project Period :1969-1982
Objectives :For evolving superior multivoltine breeds to replace the existing race, Pure Mysore.
Results/Recommendations :
· All the lines were superior to Pure Mysore in all characters, except in cocooning percentage, in which case, only three lines are superior.
· The line AW8(a) which produces white cocoons, recorded highest survival rate, yield, shell weight and shell ratio.
· Comparative performance of these lines along with those of Hosa Mysore lines and Pure Mysore are given below. Breeds of 'A' plan are equally superior to Pure Mysore as Hosa Mysore breeds.
Remarks : The experiment has been concluded and the lines are withdrawn from the breeding phase and have been included in the maintenance programme.
Source of Information :Annual Report: 1981-82
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Disease resistance studies.
Project Period :1969-1970
Objectives :To find the possible resistance in the silkworm races by subjecting them to different inductive treatments and recording the disease incidence.
Results/Recommendations:
· In general the loss of larvae was more due to grasserie.
· J112 has proved to be highly susceptible.
· Control beds have suffered less as compared to the treated lots.
· C108 and J112 are comparatively more susceptible to flacherie.
· J112 seems to have better resistance to flacherie over PM.
· The incidence of these two diseases is low in PM and can therefore be taken as fairly resistant.
Source of Information :Annual Report:1969-70
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Evolution of superior multivoltine strains-Hosa Mysore series.
Personnel :Jolly MS, Noamani MKR, Iyengar MNS, Magadum SB, Malavathy SN, Rama Mohana Rao P, Rajan RK
Project Period :1969-1982
Objectives :To evolve superior multivoltine strains-Hosa Mysore Series
Results/Recommendations :Fourteen evolved lines reared 6 times. Data indicated 36.6% reduction in larval duration; 43.5% improvement in cocoon yield; 43.7% gain in cocoon weight; 80.5% increase in shell weight over Pure Mysore. PA13 was found best with high survival and cocoon yield. PA5 was released under the name of Hosa Mysore.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Performance of parental races/hybrids used in multivoltine crash programme experiments and possibility of utilization of bivoltine races as female parents in Mysore.
Project Period :1970-71
Objectives :To study the parental pure races/hybrids comparative performances for eight different seasons.
Results/Recommendations :
· The performance of pure races has shown that Pure Mysore has significantly longer larval period than C-nichi, C108, D14b, D3c and Kolar gold. There is no significant difference among any other two races except that races C.nichi, C108 and D14b have recorded significantly better cocoon yield than J112.
· In case of yield by weight Pure Mysore was recorded the minimum yield and the KA the maximum. Therefore, it is clear that Pure Mysore has not only the longest larval period but also has recorded the lower yield by weight than C-nichi, C108, D14b, HS4, HS6 and Kolar gold. It is therefore possible that the races such as C-nichi and HS6 and C108 which are presently used in the field as male parent can beneficially raised as female parental stock. Not only the survivability of these races is as good as that of Pure Mysore but cocoons of better quality are also produced in lesser days.
Source of Information : Annual Report:1970-71
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Large scale trials of certain new selected combinations.
Project Period :1970-71
Objectives :An experiment to conduct large scale trials of certain selected combinations was undertaken both at CSR&TI, Mysore and its crash programmes at sub-stations, Mallur.
Results/Recommendations :The combinations having an improved race as the female parent not only give higher yield but also quality cocoons with renditta below ten. The raw silk yield also is higher in the new combinations compared to the cross where Pure Mysore is the female parent.
It has also been very clearly brought out that the acclimatized bivoltine hybrid combinations can be successfully reared which will enable not only increased production of silk but also of highly improved quality of silk.
On the basis of these results the 3 new combinations viz., A4e x KA, A4e x J112 and PM x KA have been included in the revised crash programme experiment.
Source of Information : Annual Report:1970-71
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Performance of breeds under fixation in hybrid combinations during early stage of inbreeding.
Project Period :1970-71
Objectives :To assess the initial combining ability performance.
Results/Recommendations :The hybrid vigour expressed is satisfactory as revealed by high yields upto 15.56 kg for 10,000 larvae brushed and high cocoon weight and high shell ratio.
Source of Information : Annual Report:1970-71
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on the reported losses of commercial crops in the Kolar area: Raising of female parent cocoons of Pure Mysore on highly fertilized leaves.
Project Period :1970-71
Results/Recommendations :The high doses of fertilizers applied for raising the female parent races do not act at all, but sometimes result in the failure of industrial crops instead it results in increasing the yields.
Source of Information : Annual Report:1970-71
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on the reported losses of commercial crops in the Kolar area: Effect of sun mounting of parental races at the spinning stage on the behaviour of hybrid seed.
Project Period :1970-71
Objectives :
Results/Recommendations :Sun mounting of parents has no adverse effect on the commercial crops on the other hand it appears to result in an increase of the yield.
Source of Information : Annual Report:1970-71
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Collection and maintenance of multivoltine germplasm.
Personnel :Datta RK, Iyengar MNS, Noamani MKR, Malavathy SN, Nagaraju J, Rama Mohan Rao P, Premalatha V, Ravindra Singh, Subramanya RK
Project Period :1971-1984
Objectives : To collect and to maintain multivoltine germplasm.
Results/Recommendations :7 indigenous races, 20 improved strains and 3 sex-limited breeds were maintained. During this year a new strain, namely Gungnong was added to the germplasm.
Source of Information :Annual Report:1983-84
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Silkworm crop improvement-Improvement in productivity of cross breeds-Enrichment of germplasm of non-hibernating breeds.
Personnel :Vijayaraghavan K, Kannantha V, Rama Mohana Rao P, Premalatha V, Ravindra Singh, Gupta SK, Sabita N
Project Period :1971-continuous
Objectives : To improve productivity of cross breeds enrichment of germplasm of non-hibernating breeds.
Results/Recommendations :Two breeds from Japan, five breeds from China and two breeds from Bangladesh were collected and added to the Germplasm.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance of parental stocks and supply of P2 layings for the bivoltine programme in Karnataka State.
Personnel :Narasimhanna MN, Venugopala Pillai S, Nusarath Muneera
Project Period :1973-1976
Objectives : Realizing the importance of the introduction of bivoltine rearing in Karnataka State, it has been decided that the institute should supply quality P2 seed to the department of sericulture in Karnataka State.
Results/Recommendations :The survival rate of KA ranged from 42-75.6%, NN6D-44-78% and NB4D2 65.6-79.5%. The individual cocoon weight ranged from 1.14-1.67g in KA, 1.20g-1.70g in NN6D and 1.30g-1.83g in NB4D2. The races recorded the shell wt. in the ranges of 0.20-0.28g in KA 0.19-0.28g in NN6D and 0.23-0.33g in NB4D2.
Source of Information :Annual Report:1973-76
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance of germplasm bank.
Personnel :Narasimhanna MN, Venugopala Pillai S, Raje Urs S
Project Period :1973-1974
Objectives :To isolate favourable genomes for future breeding programmes and also to acclamatize the new strain to the ecological conditions of Karnataka State.
Results/Recommendations :
· The breeds for Karnataka, viz.,T2 and T1 (Plain) gave the best results, with an average yield of 79% as ERR and 10 kg/10,000 larvae brushed by wt.
· The exotic breeds viz., J120, J191, Sheki-I, Sanish-21 and Sanish-30 though gave lesser yield showed better cocoon characters with single cocoon weight ranging from 1.5-2.2 g, single shell wt. 0.26-0.31 g and with a shell ratio of 19-21.6%.
Source of Information :Annual Report:1973-74
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on isolation of mutants from the natural population.
Personnel : Narasimhanna MN, Venugopala Pillai S, Geetha Devi RG
Project Period :1973-1975
Objectives: Identification of larval mutants from the natural population.
Results/Recommendations :The two mutants namely, deep colour larval mutant and light coloured larval mutants were in the ratio of 2:1.
Source of Information :Annual Report:1973-75
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on the behaviour of bivoltines in Coimbatore area of Tamilnadu.
Project Period :1973-1974
Objectives :To study the possibilities of rearing bivoltine hybrids even in the hot zone.
Results/Recommendations :Even in warm climates of Tamil Nadu bivoltines can be successfully reared by following the package of practices for raising mulberry and by following the improved technique of silkworm rearing.
Source of Information :Annual Report:1973-74
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of new breeds of bivoltines.
Personnel : Narasimhanna MN, Geethadevi RG
Project Period :1974-1975
Objectives :A new orientation of the breeding of silkworms has been introduced in the silkworm breeding and genetics section laying emphasis on the quality of the silk fibre produced rather than the quantity of silk obtained.
Results/Recommendations :It is observed that the survival rate of 'M' series is considerably low during the second and third season probably due to rearing in new ecofactors. However, the cocoon wt as also the shell wt have shown considerable improvement over the previous generation. The reelability of the batches is ranging from 76-80%.
Source of Information :Annual Report:1974-75
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Isolation of white eye mutants from the natural population (Isolation of white egg and white eye mutants).
Project Period :1974-1977
Objectives :Isolation of white eye and white egg mutants from the natural population.
Results/Recommendations :The white mutants both for egg and eye colour were recessive in nature and followed a simple Mendelian inheritance. One more interesting feature of this was that this mutant appears to be different from all the white mutants reported earlier.
Source of Information :Annual Report:1974-77
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on the effect of multiple mating on the progeny of silkworm.
Personnel : Samsom MV, Sapru ML
Project Period :1974-1975
Objectives :To find out the optimum time which results in disadvantageous character.
Results/Recommendations :In case of treatment (A) where the first male was mated for 15 mins. (NN6D) and the second male for 165 mins. (PM) to the NN6D female, there is a minimum percentage of progeny namely 6.19% from the first mated male and that of the second male represented 93.81% of the population. In the rest of the treatments, the percentage of the progeny due to the first male mated more than 15 mins. i.e., 30, 45, 60, 75 and 90 minutes varied from 45.15 to 85.40%. There seem to be set pattern of segregation of F1 progeny when NN6D female was mated first with NN6D male and remated with PM for different sets of duration.
Source of Information :Annual Report:1974-75
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Introduction of new bivoltine races and hybrids in the field.
Personnel : Narasimhanna MN, Ganesh NK
Project Period :1974-1977
Objectives : To study the possibilities of releasing new combinations of bivoltine hybrids with improved yield.
Results/Recommendations : The Extension centre has covered 425 villages of both Kolar and Bangalore districts to introduce bivoltine hybrids for commercial crops. The centre issued 4.28 lakhs of bivoltine layings. Out of these 2.28 lakhs were the hybrids of KA and NN6D and the remaining 2 lakhs includes 1.04 lakhs of Nandi hybrids and 0.96 lakhs of NB4D2 x KA hybrids. Among these, Nandi hybrids behaved better than any other combinations with an average yield of 28.4 kgs/100 dfls compared to 27.4 kgs/100 dfls for NB4D2 x KA and 25.5 kgs/100dfls for KA and NN6D hybrids. Except for a small difference in yield, both Nandi and the combination NB4D2 x KA, behaved in the same pattern.
Source of Information :Annual Report:1974-77
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Behaviour of bivoltine hybrids in Channapatna division.
Personnel : Viswanath K, Nagaraj CS
Project Period :1974-1975
Objectives :To study the cocoon yield response of bivoltine hybrids.
Results/Recommendations : Totally 13,000 kgs of cocoons were produced with an average yield of 32 kgs for 100 dfls. Further, the centre also supplied 35,000 bivoltine pure race layings to the sericulturists in Channapatna division. A total quantity of 10,906 kgs of cocoons have been harvested which works out to 33 kgs/100 dfls.
Source of Information :Annual Report:1974-75
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Analysis on the behaviour of new bivoltine and other unconventional bivoltine hybrids with private rearers of Channapatna division.
Personnel : Narasimhanna MN, Nagaraj CS, Viswanath K
Project Period :1974-1975
Objectives: To analyze the behaviour of new bivoltine and other unconventional bivoltine hybrids with private rearers of Channapatna division
Results/Recommendations : Of the combinations studied, KA x NB4D2 has given the best performance. This has been approved as the "Nandi Hybrid".
Source of Information :Annual Report:1974-75
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Standardization of silkworm eggs for commercial supply.
Personnel : Narasimhanna MN, Iyengar MNS, Puttaswamy Gowda
Project Period :1975-1976
Objectives :To standardize and adopt the loose grain form of supply, for the field conditions.
Results/Recommendations :The loose eggs gave very good and uniform hatchability, even during the low humidity seasons and produced yield of 22.2 kg per case of eggs. There is a great demand for loose eggs.
Source of Information :Annual Report:1975-76
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of new breeds of bivoltines with better reeling characters-Evolution of new races: "M-SERIES'.
Personnel : Narasimhanna MN, Iyengar MNS, Geethadevi RG
Project Period :1975-1982
Objectives :To evolve high yielding bivoltine races which yield superior quality fibre.
Results/Recommendations :The two lines viz., M5 and M8 are being utilized as components in the polyhybrid programme.
Source of Information :Annual Report:1975-82
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of New breeds "MC and MD SERIES"
Personnel : Narasimhanna MN, Iyengar MNS, Geethadevi RG
Project Period :1975-1976
Objectives :To evolve high yielding bivoltine races which yield superior quality fibre.
Results/Recommendations :
MC Series: These lines have maintained at the same level, the cocoon and filament characters as the 'M' line with a marginal decrease in silk content.
MD Series: like MC lines, MD lines, have also shown distinct improvement in survival over M lines without any sacrifice in other character.
Source of Information :Annual Report:1975-76
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title Maintenance of germplasm bank.
Personnel :Narasimhanna MN, Iyengar MNS, Jayant KP
Project Period :1975-1976
Objectives :To study the behaviour and to acclamatize the breeds to the local climatic conditions and also for studying their potentiality for direct introduction.
Results/Recommendations :34 different breeds of exotic, indigenous pure and evolved races were maintained. For survival C3J1 gave the best results followed by T2 and NN6D. Among bivoltines while HMIII and C-nichi gave better survival among multivoltines. Among bivoltines the highest single cocoon weight was recorded in NN6D whereas Kolar gold recorded by J190 and Kalimpong B, for bivoltines and HMI, HMII and NS4 among the evolved multivoltines.
Source of Information :Annual Report:1975-76
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Production and supply of seed.
Personnel : Narasimhanna MN, Iyengar MNS, Puttaswamy Gowda
Project Period :1975-1977
Objectives : To prepare and to supply quality seeds to field.
Results/Recommendations : The section prepared a total quantity of 1,54,579 dfls of various races and hybrids. 5,366 P3 dfls were prepared for feeding CSR&TI P3 unit. For supply to P2 centres, 9,095 dfls were prepared and distributed. More than 33,000 P1 dfls in two races, KA and NB4D2 were also prepared and distributed to the bivoltine seed area at Attibele. The section also prepared and distributed 32,510 dfls of bivoltine hybrids and 35,200 dfls of Hosa Mysore hybrids to sericulturists.
Source of Information :Annual Report:1975-77
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Standardization of silkworm eggs for commercial supply- Screening of new bivoltine races of silkworms for the trait urination.
Personnel : Singh K, Raghuraman R
Project Period :1975-1977
Objectives :To study the urination behaviour of some selected bivoltine races and their crosses with multivoltine.
Results/Recommendations :The highest percentage of stained cocoons was recorded for PM x KA (9.33%) followed by HMII x KA (6.37%), KA (5.67%), NB4B1 (5%), NN6D (4.67%), NB4C1 (4.5%) and NB4D2 (4%), the least being in case of NB2C2 (3.3%).
Source of Information :Annual Report:1975-77
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title : Field trials of new bivoltine hybrids.
Personnel :Ganesh NK, Benchamin KV, Raje Urs S
Project Period :1975-1977
Objectives :To improve the present performance of KA and NN6D hybrids of newly evolved bivoltine races.
Results/Recommendations : 3 promising new bivoltine hybrid combinations viz., NB3A x NB2C1, NB4D2 x KA and KA x NB3D1 and their reciprocals were issued to this centre for field trials and it reveals that the yield/100 dfls is ranging from 32 kgs to 50 kgs.
Source of Information :Annual Report:1975-77
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Field trials of new bivoltine hybrids.
Personnel :Narasimhanna MN, Viswanatha Kannantha, Nagaraj CS
Project Period :1975-1979
Objectives :To study the field performance of bivoltine hybrids.
Results/Recommendations :A quantity of 10,589 dfls of new bivoltine hybrids was issued to the field. Average yield/100 dfls was 26,252 by number and 39.480 kg by weight. Average rate/kg of cocoon and return/100 dfls was Rs.34 to 36 and Rs.1,337-63 respectively.
Source of Information :Annual Report:1975-79
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Conservation of bivoltine festival to popularize the benefits of bivoltine hybrid in Karnataka State.
Personnel : Viswanatha Kannantha , Nagaraj CS
Project Period :1975-1976
Objectives :To demonstrate the technical know-how to the sericulturists of the remote corners and to transfuse newer methodologies of moriculture and sericulture.
Results/Recommendations : Whenever a large quantity of bivoltine dfls were issued in one village and the rearers expected bumper harvests, the seiculturists of such village desired to express their pleasure by observing bivoltine festival. The sericulturists of Vondaraguppe and Koregala observed this festival. The opportunities were utilized by the extension wing which arranged the sericultural exhibition and exhibited the sericultural importance.
Source of Information :Annual Report:1975-76
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Demonstration of bivoltine hybrid rearing in the irrigated areas of the south zone.
Personnel :Baktavatsalu K
Project Period :1975-1977
Objectives :To emphasize the economic benefits accruing out of the biovltine rearings.
Results/Recommendations : A quantity of 6,730 dfls of bivoltines were issued to Maliyur and Kollegal areas. An average of 30-35 kg/100 dfls with an average price index of Rs.30-32/kg was obtained.
Source of Information :Annual Report:197577
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Introduction of new races of bivoltine hybrids in Coimbatore.
Personnel : Venugopala Pillai S, Vijayaraghavan K
Project Period :1975-1976
Objectives :To introduce high yielding strains of bivoltines in Coimbatore area.
Results/Recommendations : For 4,430 dfls during October'75-February'76,1310 kgs of cocoons were harvested. The average yield/100 dfls works out to 32 kgs for the whole year. The cocoon characters are superior as compared to multivoltines as evidenced by the rate/kg of cocoons. There is a consistent demand for "Nandi" in Coimbatore area.
Source of Information :Annual Report:1975-76
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Heterosis studies on some of the selected multivoltines.
Project Period :1976-1977
Objectives :To evaluate the combining ability of the promising multivoltine races with the improved bivoltines evolved at CSR&TI.
Results/Recommendations :The eight combinations have recorded survival rates of more than 70% and yield of more than 13 kgs for 10,000 larvae brushed. The highest of 102% increase over better parent in PA13 x NB4D1 were observed. The increase in survival was also considerable over better parent, but not very remarkable over the traditional hybrid. The most significant improvement over traditional hybrid was observed in cocoon characters. The data point out the highly promising features of the hybrid combinations presented, and to high degree of heterosis that could be exploited.
Source of Information :Annual Report: 1976-77
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance of the germplasm (bivoltine) strains-Maintenance of germplasm of silkworm strains.
Personnel : Jammy TR, Samuel IJ, Krishnakumar G, Basavaraja HK, Nagaraju J, Vindhya GS, Naseema Begum A, Mal Reddy N, Sudha VN, Suresh Kumar N, Raghavendra Rao D, Ratnasen, Nirmal Kumar S, Sudhakara Rao P, Kalpana GV, Iyengar MNS, Rama Mohana Rao P, Bharadwaj NG, Nagaraj CS
Project Period :1976-1989
Objectives : To maintain various silkworm stocks of indigenous and exotic origin for further breeding experiments.
Results/Recommendations :A total 173 breeds comprising of mutants, Sex-limited lines, indigenous and exotic breeds are being maintained.
Source of Information :Annual Reports:1976-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Improvement in silk yield due to package of practices over farmer's practices.
Personnel :Krishnaswami S, Iyengar MNS, Kodandaram MS
Project Period :1976-1977
Objectives :To demonstrate the advantage of package of practices over the traditional farmer's practices, starting from mulberry to cocoon production and silk yield.
Results/Recommendations :The quality of cocoons produced under package of practices was superior over the farmer's practices. The renditta of cocoons produced under package of practices was 9.27 as against 12.8 under farmer's practices. The length of filament in the cocoon under package of practice was 750 mts while it was only 400 mts in farmer's practices.
The calculated yield of silk/ha worked out to 42.8 kgs/rearing under package of practices as against only 14.2 kg under the farmer's system, which is an increase of 200%.
Source of Information :Annual Report: 1976-77
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Popularization of improved multivoltines.
Personnel : Krishnaswami S, Venugopala Pillai S, Gangaiah B
Project Period :1976-1979
Objectives: To popularize high yielding multi x bi hybrids of silkworm.
Results/Recommendations :
· Sericulturists were guided in rearing of improved multivoltines like PM x NB4D2 and the hybrids of Hosa Mysore x New bivoltines
· The Extension staff distributed 1,47,766 dfls of improved multivoltines and 3,983 dfls of Hosa Mysore hybrids and cocoon harvest data were collected for 1,16,983 dfls of improved multivoltines wherein the average cocoon yield/100 dfls was 37.1 kg and the income was Rs.929.
· Similarly 3,983 dfls of Hosa Mysore hybrids were distributed and a quantity of 1,542 kg of cocoon was harvested. The yield/100 dfls was 38.7 kg and the income was Rs.1,161.
Source of Information :Annual Report: 1976-79
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Popularization of bivoltine hybrids in south zone.
Personnel : Krishnaswami S, Venugopala Pillai S, Gangaiah B
Project Period :1976-1980
Objectives: To popularize improved new bivoltine hybrids in southern zone.
Results/Recommendations :A total quantity of 8,090 dfls of bivoltine hybrids were was distributed by the station and guidance was given regarding the new technology of rearing and collected the data for 6,700 dfls. The average yield worked out to 39.8 kgs with a return of Rs.1,200/100 dfls with an increase of 15-20% over rearing of multivoltine hybrids.
Source of Information :Annual Report: 1976-80
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Rearing of P3 stock, new bivoltines and Hosa Mysore pure races
Personnel : Venkataramu CV, Raghavendra M
Project Period :1976-1977
Objectives: To maintain the P3 stock, new bivoltines and Hosa Mysore pure races.
Results/Recommendations :
Behaviour of P3 stock: A comparison of the behaviour of KA and NB4D2 indicated that NB4D2 gave higher survival, higher cocoon wt and higher cocoon shell wt than KA
Behaviour of New bivoltine races:The overall data of the new bivoltines indicated that NB4D1, NB3D1, NB2D2 exhibited high number of eggs/layings. The hatchability was good in NB4D2, NB4D3 (M) & NB4D2.
Behaviour of Hosa Mysore stocks:
Hosa Mysore-II: The highest survival with good cocoon characters are obtained in May-June, September-October seasons whereas the ERR was 7549 by number and 6.926 kgs by wt. The single cocoon wt varies from 1.118 gm to 1.460 gm and single shell wt. ranging from 0.212 to 0.254 gms.
Hosa Mysore-III: HM III gave 471 eggs/laying with hatchability of 86.4%. The ERR was 6917 by number, 7.868 kgs by wt. The single cocoon wt was 1.280 gm and the shell wt was 0.180 gm.
Source of Information :Annual Report: 1976-77
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Field trials of bivoltine, new bivoltines and Hosa Mysore hybrids.
Personnel : Venkataramu CV, Raghavendra M, Nagaraj B
Project Period :1976-1977
Objectives :To evaluate the bivoltine and Hosa Mysore hybrids at the field level.
Results/Recommendations :
Field trials of Hosa Mysore hybrids: 2025 layings of HM hybrids in combination with KA, NB4D2, were distributed. The total cocoon yield was 683.250 kgs. The average return/100 layings from Rs.697.74 to Rs.1,654.75.
Field trials of bivoltine and new bivoltine hybrids: 1580 layings of bivoltine hybrids consisting of Nandi and new bivoltines were distributed. The average cocoon yield/100 layings ranging from 21.533 kgs. to 50 kgs. The average return/100 layings ranging from Rs.739.85 to Rs.1,395.00.
Field trials of Nandi Hybrids: A quantity of 580 layings were distributed. The average yield/100 layings was 33.328 kgs. The average selling rate/kg of cocoon was Rs. 29.53. The average return/100 layings was Rs.993.88.
Source of Information :Annual Report: 1976-77
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of yellow colour cocoon race.
Personnel : Jammy TR, Samuel IJ, Krishna Kumar G
Project Period :1976-1978
Objectives: To evolve yellow colour cocoon races.
Results/Recommendations : In all the trials, they are breeding true to yellow cocoon colour. All the batches viz., KAPY, NAPY, KAPYBC, NAPYBC in their 8th and 7th generations were shifted to CSRTI Mysore for testing and further observation.
Source of Information :Annual Report: 1977-78
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Hybrid studies-Single hybrid studies.
Personnel : Krishnaswami S, Iyengar MNS, Thyagaraj BS
Project Period :1977-1979
Objectives :To evaluate the new bivoltine hybrids.
Results/Recommendations :Among the 30 hybrids tested, the most promising were NB6 x NB18, NB26 x NB6, NB14 x NB18 and NB23 x NB18 and their reciprocals.
Source of Information :Annual Report: 1977-79
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Hybrid studies-Polyhybrid studies.
Personnel : Krishnaswami S, Iyengar MNS, Thyagaraj BS, Jolly MS, Noamani MKR
Project Period :1977-1982
Objectives :
· To study the behaviour and feasibility of polyhybrids-both triple and tetra hybrids. OR
· To identify better combiners and to study the performance of the polyhybrids to improve the yield in seed area.
Results/Recommendations :
· The analysis revealed that all the 12 foundation hybrids excelled over their respective parents for the commercial characters.
· GCA analysis revealed that the combination 4 x 1, 4 x 3, 7 x 10 and 5 x 9 are good combiners.
· Two polyhybrids were prepared by crossing one oval foundation cross with one dumbell foundation cross viz., (2C1SS x NB2C1) x (NB4D1 x M8) (4x1) x (7x10) and (2C1SS x NB3C1) x (NB2D1 x M5) (4 x 3) x (5 x 9)
· These polyhybrids show 25% improvement in egg production, 17% improvement in terms of cocoon yield and 14% in terms of shell weight.
· These hybrids are under multilocational trials in six Research Extension Centres of CSR&TI, Mysore.
Source of Information :Annual Report: 1977-82
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance and supply of basic seed.
Personnel : Krishnaswami S, Basavaraja HK, Thyagaraj BS, Ananthanarayan S
Project Period :1977-1978
Objective : To maintain and to supply basic seed to P2 stations
Results/Recommendations :The section supplied 29,435 dfls to P2 stations and 7,690 dfls to other farms in Karnataka, Tamil Nadu and Andhra Pradesh. 10,350 dfls were also supplied to seed area.
Source of Information :Annual Report: 1977-78
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Study on performance of bivoltine hybrids in the field.
Personnel : Benchamin KV, Saproo ML, Suryanarayan Setty
Project Period :1977-1981
Objectives :Comparative study on the yield performances of bivoltine and multivoltine hybrids.
Results/Recommendations : A total of 61,279 dfls of bivoltine hybrids were reared and harvested under the guidance of the extension staff. The average cocoon yield/100 dfls reared was 40.4 kgs more than 6,000 sericulturists have been benefited under this programme.
Source of Information :Annual Report: 197781
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Collection of yield data in respect of multivoltine and bivoltine hybrids in the three adopted villages.
Personnel : Parthasarathy BS, Aradhya NSC
Project Period :1977-1983
Objectives : Intensive demonstration of new technology of silkworm rearing in the adopted villages.
Results/Recommendations : A total quantity of 20,937 dfls of bivoltine hybrids were distributed to the sericulturists of 4 adopted villages. As a result of intensive technical guidance, the average yield of 33.666 kg/dfls was obtained as against 21.293 kg/100 dfls in multivoltine hybrids. The average return for 100 dfls in bivoltine and multivoltines were Rs.1,826-30 and 786-51 respectively.
Source of Information :Annual Report: 1977-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Germplasm maintenance-Maintenance of multivoltine germplasm strains.
Personnel :Iyengar MNS, Sudhakaran M, Vijayaraghavan K, Nagaraju J, Premalatha V, Vishwanatha K
Project Period : 1977-1988
Objectives :To maintain various multivoltine breeds of different origin.
Results/Recommendations :A total of 64 multivoltine breeds which includes geographical races from India, China, Bangladesh, evolved breeds and sex-limited breeds are being maintained.
Source of Information: Annual Reports:1977-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding of higher productive bivoltines suited to tropical conditions. NBH, NBJ and NBZ Series.
Personnel : Krishnaswami S, Iyengar MNS, Basavaraja HK
Project Period :1978-1982
Objectives : Fixing bivoltine strains with high silk content.
Results/Recommendations :
· NBH1, NBH2 and NBH3 showed considerable improvement in shell content (24.31%) coupled with yield by number (8386/10,000) and by weight (12.391 kg) followed by NBH (MC).
· Among the NBJ set of lines, NBJ2 registered improvement in terms of yield, both by number (7066) and by weight (10.185 kg)/10,000 larvae brushed and in terms of shell ratio (24.6%) closely followed by NBJ1 (7066 by number, 9.146 by wt and 23.6% shell ratio).
Source of Information :Annual Report: 1977-82
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of superior multivoltine series-Introduction of sex-limited larval markings in Hosa Mysore.
Personnel : Iyengar MNS, Noamani MKR, Magadum SB, Malavathy SN, Rajan RK
Project Period :1978-1983
Objectives :Introducing sex-limited larval markings in some of the popular multivoltine breeds for simplifying the grainage operations.
Results/Recommendations :The two new auto sexing lines fixed viz., AP1 (SLA) and AP1 (SLB) are breeding true. The rearing performance is comparable to original race AP1.
Source of Information :Annual Report: 1978-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Silkworm rearing-Studies on the behaviour of New bivoltines.
Personnel : Venugopala Pillai S, Bhat DV
Project Period :1978-1982
Objectives: To study the rearing behaviour of new bivoltines.
Results/Recommendations : Among the 'M' series M3 has given the highest cocoon weight of 1.900 gms with 0.320 gms shell weight and 19.3% shell content. An ERR of 94% was obtained in respect of M2 lines.
Source of Information :Annual Report: 1978-82
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Silkworm rearing-Studies on the behaviour of multivoltines.
Personnel : Venugopala Pillai S, Bhat DV
Project Period :1978-1979
Objectives: To study the behaviour of new multivoltines
Results/Recommendations : Out of 4 breeds tested, KAPY & NAPY behaved satisfactorily but HM gave overall better results with good yield and better cocoon weight and shell weight. All the lines are being continued.
Source of Information :Annual Report: 1978-79
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Experimental rearing with bivoltine races in rainfed conditions-To study the performance of bivoltine races during different seasons of the year.
Project Period :1978-1982
Objectives :To study the rearing performance of pure bivoltine races during different seasons.
Results/Recommendations :Three rearings with bivoltine races of NB7 and NB18 were conducted during this year under report. The performance of the races NB7 and NB18 was good in the summer season (May-June 1980), whereas the yields were 71.3 kgs and 63.8 kgs for 100 dfls in the two races respectively.
Source of Information :Annual Report: 1978-82
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title : Performance of Hosa Mysore hybrids.
Personnel : Benchamin KV, Saproo ML
Project Period :1978-1979
Objective: To study the rearing performance of Hosa Mysore hybrids.
Results/Recommendations :An average yield of 37.525 kg/100 dfls of Hosa Mysore hybrids’ rearings fetched an average return of Rs.1,054.45 to the rearers. The rate per kg of cocoons was Rs.28.10 while, Pure Mysore hybrids yielded an average 28.3 kg which fetched Rs.25.97/kg and net return of Rs.734.95/100 dfls reared.
Source of Information :Annual Report: 1978-79
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Field trials of new bivoltine races.
Personnel : Benchamin KV, Saproo ML
Project Period :1978-1980
Objectives :Field trials of new bivoltine hybrid layings.
Results/Recommendations :
· An average yield of 46.9 kg/100 dfls with a cash return of Rs.1,545.84.
· These new hybrids gave an average increase of 11.3 kgs of cocoons and an additional income of Rs.529.11 for 100 dfls over the traditional bivoltine hybrids.
Source of Information :Annual Report: 1978-80
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Hosa Mysore hybrid trial in the field.
Personnel :Parthasarathy BS, Viswanatha Kannantha
Project Period :1978-1979
Objective: To study the performance of Hosa Mysore race in the field
Results/Recommendations :Totally 4,500 dfls were distributed to 28 rearers of this area. Average yield was 32.189 kg/100 dfls. Average rate per kg of cocoons was Rs.27.23 and net return from 100 dfls reared was 998.28.
Source of Information :Annual Report: 1978-79
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Behaviour of bivoltine races.
Personnel : Ananthanarayan S, Krishnamurthy KN
Project Period :1978-1980
Objective: To study the rearing performance of bivoltine races
Results/Recommendations :
· KA: 2,75,583 dfls were reared with an average yield of 18,926 by number and 25.650 kg by weight/100 dfls.
· NB4D2: 3,63,963 dfls were harvested with an average yield of 19,893 cocoons by number and 26.385 kg/weight for 100 dfls.
· NB7: 5,618 layings were brushed with an average yield of 21,745 by number and 33.680 kgs by weight/100 dfls. The maximum single cocoon weight was 1.557 gm and minimum was 1.400 gm.
· NB18: 1,459 layings were brushed. The average yield for 100 dfls was 20,761 by number and 28.480 kg by weight. The maximum single cocoon weight single cocoon weight was 1.329 gm and the minimum was 1.320 gm.
· It is observed that NB1C1, NB2C1, NB3C1 and NB3D1 gave 49.470, 41.500, 47.400 and 34.100 kg yield/100 dfls respectively.
Source of Information :Annual Report: 1978-80
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Introduction of sex-limited larval markings in promising multivoltine breeds-AP1 sex-limited lines.
Personnel :Datta RK, Noamani MKR. Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period : 1978-1984
Objectives : To maintain sex-limited larval markings in promising multivoltine breeds
Results/Recommendations :Two lines AP1(SLA) and AP1(SLB) were maintained.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Seed production-Seed production in new bivoltines/Studies on the new bivoltines.
Personnel :Venugopala Pillai S
Project Period :1978-1982
Objectives : To test the performance of growth, behaviour, cocoon characters and egg laying capacity of 'NB' lines.
Results/Recommendations :
· Among the 14 lines, NB2B, NB3B, NB3D2, NB4D1 & NB4B showed better results with an average single cocoon weight of 1.90 gms and average single shell weight of 0.410 gms and recording an average shell percentage of 21.5. NB4D1 showed the highest ERR of 85.61%.
· Among the 'M' series has given highest cocoon weight of 1.900 gms with 0.320 g shell weight and 19.3% shell content. An ERR of 94% was obtained in respect of M2 lines.
Source of Information :Annual Report: 1978-82
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on the performance of germplasm breeds.
Personnel : Venugopala Pillai S, Bhat DV, Ranganath BK
Project Period :1979-1986
Objectives :Introducing productive bivoltine races of silkworms.
Results/Recommendations : 22 bivoltine breeds of different ecogeographic origin were maintained in the Germplasm. Among the breeds maintained highest ERR was recorded for M8 (95.78%) followed by J112 (95.72%) respectively. Whereas cocoon yield was highest in J122 (16.22 kgs) followed by A.W.C (16.1 kg) for 10,000 larvae brushed. Single cocoon weight was higher in NB1C (1.783 gm) followed by J122 (1.744 gm), whereas the SPC and SPJI recorded higher shell weight (0.385 gm) followed by 2C1SS (0.374 gm).
Source of Information :Annual Report:1979-86
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title : Studies on performance of bivoltine hybrid layings supplied to CSRTI extension centres.
Personnel :Nusarath Muneera, Putte Gowda KN, Chandrashekaraiah
Project Period :1979-1981
Objectives :To study the performance of bivoltine hybrids.
Results/Recommendations :25,940 dfls of NB7 x NB18 and NB18 x NB7 hbyrids were prepared and supplied to the CSR&TI Extension centres at Lalgondahalli, Krishnapuradoddi, Mugur and Chamarajanagar.
· NB7 x NB18: An average cocoon yield of 53.54 kg/100 dfls was obtained at Krishnapuradoddi Extension Centre, closely followed by 50.90 kgs obtained at Lalgondahalli. The cocoons were sold at the rate of Rs.36.52. The results in respect of Chamarajanagar and Mugur were 34.384 kg and 30.9 kgs in yield, which are comparatively lower since the rearings were conducted in rainfed localities.
· NB18 x NB7: These hybrids yielded good results in Krishnapuradoddi extension centre, harvesting an average yield of 52.345 kg/100 dfls and Lalgondahalli obtaining 50.10 kgs.
Source of Information :Annual Report:1979-80
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Rearing of NB7 and NB18 in the field (RSRS, Salem).
Project Period :1979-1980
Objectives :To evaluate the rearing performance of new bivoltine breeds.
Results/Recommendations :2,730 dfls were prepared in this combination (NB7 x NB18) and distributed during January 1980, which gave an average cocoon yield of 35 kg/100 dfls.
Source of Information :Annual Report:1979 -80
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Survey and collection of promising bivoltines available in the country.
Personnel : Jolly MS, Dutta RK, Iyengar MNS, Nagaraju J, Naseema Begum A
Project Period :1980-1982
Objectives :To conduct a survey of the promising bivoltines from different breeding centres, collect them and to study their performance and the utility value for introduction or as breeding material.
Results/Recommendations :
· The strains PLF, KY1, BL1, SF17, YS7 and SS17 are promising in their cocoon characters and uniformity.
· A programme of inter-strain crossing is being taken up to combine and improve the promising strains.
Source of Information :Annual Report:1980-82
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on the performance of various silkworm breeds and methods to improve yield and cocoon characters-Performance of Japanese hybrid.
Personnel : Venugopala Pillai S, Bhat DV
Project Period :1980-1981
Objectives :To study the growth features, economic characters of Japanese silkworm hybrids.
Results/Recommendations :The breed Shuko-Rhyhaku breed were studied and showed two sets of larvae i.e., plain and marked ones. The marked larvae showed comparatively better cocoon characters with a mean of 2.048 gm of single cocoon weight 0.481g single shell weight and 23.5% silk content and 23.6% of silk content in respect of plain larvae and marked larvae respectively.
Source of Information :Annual Report:1980-81
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Bivoltine versus multivoltine crops.
Project Period :1980-1981
Objectives :Study on the behaviour of bivoltine and multivoltine crops.
Results/Recommendations :In the bivoltine crops, there is an extra yield of 4.5 kgs of cocoons/100 dfls reared. Thus the overall performance of bivoltine hybrids is markedly superior as compared to multivoltine hybrids.
Source of Information :Annual Report:1980-81
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on behaviour of different bivoltine races (Anekal).
Personnel : Biram Saheb NM
Project Period :1980-1983
Objectives :To study the performance of different bivoltine races.
Results/Recommendations :The extension centre provided technical guidance in rearing 70,657 dfls of bivoltine pure races. The data revealed that the race KA performed well with 29,479 kg followed by NB18 with 25.21 kg, NB4D2 with 22.540 kg and NB7 with 22.25 kg for a unit of 100 dfls. An overall average yield of 17,026 cocoons by number and 24.100 kg by weight for 100 dfls has been recorded.
Source of Information :Annual Report:1980-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Comparative study on the performance of Hosa Mysore and TW hybrids (RSRS, Salem).
Project Period :1980-1981
Objectives :To study the performance of Hosa Mysore in comparison with Tamil Nadu White hybrids.
Results/Recommendations :A total quantity of 4,225 dfls of Hosa Mysore x NB4D2 were harvested. The average yield/100 dfls was 35.5 kgs and obtained an average rate of Rs.24.50/kg of cocoons whereas Tamil Nadu white hybrids yielded an average of 26.5 kgs/100 dfls (average for 1200 dfls reared).
Source of Information :Annual Report:1979-81
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Rejuvenation studies.
Personnel :Biram Saheb NM
Project Period :1980-1982
Objectives :To improve qualitative and quantitative characters by rejuvenation.
Results/Recommendations :The study revealed that the rejuvenated NB7 race consisting of R1, R2 and R3 gave an average yield of 17,459 cocoons by number and 25.2 kgs by weight/100 dfls. Under the control batches, the average yield obtained was 14,206 by number and 20.7 kgs by weight. The rejuvenated NB18 race consisting of R1, R2 & R3 gave an average yield of 16,667 cocoons by number and 24.9 kgs by weight/100 dfls. The control batches of NB18, viz., NB18C1, NB18C2 and NB18C3 gave an average yield of 11,625 cocoons by number and 16 kgs by weight/100 dfls.
Source of Information :Annual Report:1980-82
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title : Study on the performance of bivoltine races in the field. (RSRS, Salem)
Personnel : Sheriff A, Rajan RK, Biram Saheb NM
Project Period :1980-1982
Objectives : To study the performance of bivoltine races in the field.
Results/Recommendations :3610 dfls of NB4D2 x NB7 and NB18 x NB7 crosses were supplied to 38 sericulturists. These rearings gave an average yield 36.6 kg/100 dfls and average return of Rs.1018/100 dfls was obtained by individual farmers.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Rejuvenation study on popular bivoltine races.
Personnel :Jolly MS, Benchamin KV, Nagaraj CS
Project Period :1980-1982
Objectives :Rejuvenation of NB7 and NB18 bivoltine breeds.
Results/Recommendations :
· Rejuvenation cross was found effective to improve the survival rate, cocoon weight and yield.
· There was no marked improvement in shell weight, melting and egg number.
· The yield of layings was also better in the rejuvenated cross particularly in NB7 breed.
· The rejuvenation cross was found more effective in the direct rearing at R1 level.
Source of Information :Annual Report:1980-81
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding for hardier and high yielding bivoltines suitable to tropical conditions-Breeding of Indonesian hybrids.
Personnel : Jolly MS, Noamani MKR, Iyangar MNS
Project Period :1981-82
Results/Recommendations :Performance of Indonesian hybrids
Source of Information :Annual Report:1981-82
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Experimental bivoltine silkworm rearing under rainfed conditions-Rejuvenation study (Mugur).
Personnel : Thyagaraja BS, Madhusudan Rao M
Project Period :1981-1982
Objectives :To study the rearing performance of rejuvenation batches during different seasons under rainfed conditions.
Results/Recommendations :The superiority of races R2 and R3 of NB7 and NB18 with respect to ERR which ranged from 70-90% except that reared in May. The maximum average single cocoon weight for NB7 R2 & R3 were 1.680 g and 1.525 g respectively and for NB18 R2 and R3 1.599 g and 1.577 g respectively.
Source of Information :Annual Report:1981-82
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title : Studies on Performance of polyhybrids with rainfed mulberry under village (Mugur) adoption programme.
Project Period :1981-1982
Objectives: To study the performance of polyhybrids with rainfed mulberry under village (Mugur) adoption programme.
Results/Recommendations :A total of 2,625 dfls of polyhybrids were distributed in Hosakote, Mugur and Bagali areas during November-December 1981 and December'81-January'82. An average yield of 37.7 kgs/100 dfls reared.
Source of Information :Annual Report:1981-82
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title : Studies on performance of polyhybrids in the field.
Project Period :1981-1982
Objectives: To study the performance of polyhybrids in the field.
Results/Recommendations :A total quantity of 9464 dfls of polyhybrids were supplied in the adopted villages which yielded an average of 43.4 kgs/100 dfls.
Source of Information :Annual Report:1981-82
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title : Studies on polyhybrid programme in the field.
Project Period :1981-1982
Objectives: To study the polyhybrid programme in the field.
Results/Recommendations :Two batches of polyhybrids were issued to the rearers. The combinations issued were CA x EG, EG x CA, CB x DF and DF x CB. An average yield of 43.55 kg/100 dfls were obtained.
Source of Information :Annual Report:1981-82
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Field trials with rejuvenated polyhybrid stocks.
Project Period :1981-1982
Objectives: To study the rejuvenated polyhybrid stocks in the field.
Results/Recommendations :The extension centre conducted field trials by issuing the rejuvenated and polyhybrid layings to selected sericulturists in the three taluks. An average yield of 36.71 kg and a return of Rs.3,257 per 100 dfls reared was obtained in respect of polyhybrids. The average yield in respect of rejuvenated stocks was of the order of 30.00 kgs/100 dfls.
Source of Information :Annual Report:1981-82
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Preparation and distribution of polyhybrid layings. (RSRS, Salem)
Personnel :Vijayaraghavan K, Sampath C, Das PK
Project Period :1981-1982
Objectives : To prepare and to distribute polyhybrid layings among farmers.
Results/Recommendations :A total quantity of 374 dfls of foundation cross layings were reared and 26480 layings of polyhybrids were prepared and distributed to silkworm rearers and harvested an average cocoon yield of 50.24 kg/100 dfls.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding plan for high shell weight and longer filament length-Hybridization among selected inbred lines.
Project Period :1982-1983
Objectives :To introduce desirable characters, particularly high shell weight to approved races through hybridization and backcross breeding followed by inbreeding coupled with selection.
Results/Recommendations :The plan CB2 (3-way cross) showed highest viability (95%) and yield (16.983 kg) in F3 generation during October-November 1982. The 4-way cross (CC1) reached F4 in March 1983.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding plan for high shell weight and longer filament length-Improvement of approved races through back-cross breeding.
Project Period :1982-1983
Objectives :Improvement of new silkworm races through back cross.
Results/Recommendations :CD1, CD2, CE1 & CE2 were backcrossed three times with their donor parents. After test-cross studies, only the promising lines will be retained for evaluation of suitable hybrids for commercial use.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding for temperature resistance.
Project Period :1982-1983
Objectives :To introduce temperature resistance to the approved bivoltine races viz., NB7, KA, NB4D1, NB4D2 for commercial rearings in the hot areas of Andhra Pradesh, Tamil Nadu and Karnataka State.
Results/Recommendations :PCN was chosen as a donor parent as it is temperature resistant strain. The performance was good and suggests the possibility of exploiting this combination (F1) for commercial rearing. This experiment is being further amplified by back crossing F1 hybrids to bivoltines and Pure Mysore to isolate hardy bivoltines and shorter larval span multivoltines respectively, apart from the F1 being advanced.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Isolation of multivoltine strains with better qualitative and quantitative characters compared to Pure Mysore-Breeding for shorter larval period.
Personnel :Vijayaraghavan K, Nagaraju J, Premalatha V, Ravindra Singh, Gupta SK
Project Period :1982-1987
Objectives :To evolve silkworm breeds with shorter 5th instar period and higher productivity.
Results/Recommendations :Two lines namely MY1 and MY2 have been isolated. Out of these MY1 was found promising showing an improvement of 30% in yield, 20% in cocoon weight and 34% in shell weight when tested at farm/farmers level.
Source of Information :Annual Report:1982-87
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Reduction and combination of evolved bivoltines-NBJ, NBH and NBZ Series.
Project Period :1982-1983
Objectives :To reduce the lines and to select suitable lines for further breeding studies.
Results/Recommendations :The seven lines out of NBJ, NBZ, NBH, NBZH and NBJH series were selected through line x tester analysis. Four out of M series and three out of SC series were selected through interline crossing and eleven out of NB series were selected based on performance of pure races.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Reduction and combination of evolved bivoltines-M series.
Project Period :1982-1983
Objectives :To improve the 'M' lines.
Results/Recommendations :Out of fourteen interline crosses, M5 x M6 and M9 x M10 registered the pupation ratio and yield of 74% and 10.6 kg and 60% and 8.55 kg respectively.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Reduction and combination of evolved bivoltines-NB series
Project Period :1982-1983
Objectives: To study the combinations of evolved bivoltine races.
Results/Recommendations :
· Among Chinese type lines NB2C1 performed better for yield cocoons weight, shell weight and shell ratio followed by NB2B and NB1C.
· Among Japanese type lines NB3D1 ranked first for yield by number and weight/10,000 larvae cocoons weight followed by NB4D and NB4D2.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Reduction and combination of evolved bivoltines-Survey collections.
Project Period :1982-1983
Objectives: To study the combinations of evolved bivoltine races.
Results/Recommendations :Promising survey collection viz., BL1, YS7, PLF and KY1 (Pampore) and KY1 (Kalimpong) were selected and crossed to obtain three hybrids. These hybrids were advanced to third generation.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Exploitation of heterosis-Screening of NBJ, NBH and NBZ lines.
Project Period :1982-1983
Objectives :To identify suitable lines for exploitation of heterosis.
Results/Recommendations :Fourteen lines of this series were selected for estimating combining ability. Eight oval lines were crossed to tester NB4D1 and six constricted lines were crossed to KA.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Exploitation of heterosis-Polyhybrid testing-Testing of selected double hybrids
Project Period :1982-1983
Objectives :To identify superior polyhybrid combinations.
Results/Recommendations :The foundation crosses and the polyhybrids were superior to the parents in ERR, yield, cocoon weight, shell weight and fecundity.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Exploitation of heterosis-Polyhybrid testing-Testing of promising new lines for double hybrid
Project Period :1982-1983
Objectives :To evaluate the promising new lines for double hybrid.
Results/Recommendations :There was a marginal improvement in the foundation crosses of Japanese type, whose parents were low in ERR, but the double cross was significantly superior and showed marked hybrid vigour.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Exploitation of heterosis-Polyhybrid testing-Double hybrids using approved races and newly evolved lines
Project Period :1982-1983
Objectives :To find out the effect of using the established approved races along with the new lines as components of double hybrids.
Results/Recommendations :The significant hybrids vigour in all the three foundation crosses and marginal improvement in double hybrids. The foundation crosses are very promising and high yielding with high survival.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Exploitation of heterosis-Polyhybrid testing-Foundation crosses among the approved races.
Project Period :1982-1983
Objectives :To study the feasibility of including foundation crosses among the current approved races viz., KA, NB7, NB4D2 and NB18.
Results/Recommendations :The hybrid between KA x NB7 showed significant heterosis in survival, yield and cocoon characters, while the NB4D2 x NB18 hybrid did not yield any heterotic response.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Exploitation of heterosis-Feasibility of using bivoltine polyhybrids and foundation hybrids with Pure Mysore.
Project Period :1982-1983
Objectives :To study the comparative performance of bivoltine foundation hybrids and polyhybrids as male component for Pure Mysore hybrids.
Results/Recommendations :There were no significant differences among the different foundation hybrids or polyhybrids. The foundation hybrids were not inferior to pure races as male component of Pure Mysore hybrid.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of superior multivoltine strains-MN (YP) series.
Personnel :Jolly MS, Datta RK, Noamani MKR, Subramaniam RK, Nagaraju J, Rama Mohan Rao P, Premalatha V
Project Period :1982-1983
Objectives :To evolve superior multivoltine races over the existing Pure Mysore.
Results/Recommendations :Improvement in larval duration (21:06) is superior over PM and for Nistari in cocoon weight, shell weight and SR%.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of superior multivoltine strains-NH (YP) series.
Personnel :Jolly MS, Datta RK, Noamani MKR, Subramaniam RK, Nagaraju J, Rama Mohan Rao P, Premalatha V
Project Period :1982-1983
Objectives: To study evolution of superior multivoltine strains-NH (YP) series.
Results/Recommendations :Shorter larval duration, hardiness and non-hibernating characters were introduced to HM.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of superior multivoltine strains-MHMP series.
Project Period :1982-83
Objectives: To evolve superior multivoltine strains-MHMP series.
Results/Recommendations :PM was improved by introducing better economic characters of HM and Mysore Princess. All the economic characters except ERR were found superior to the parents.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Personnel :
Project Title :Evolution of superior multivoltine strains-MH-11 series.
Project Period :1982-1983
Objectives: To evolve superior multivoltine strains-MH-11 series.
Results/Recommendations :Improvement of PM by introducing good characters of MH and PA11.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of superior multivoltine strains-HN7 and MHN7 series.
Project Period :1982-83
Objectives: Evolution of superior multivoltine strains-HN7 and MHN7 series.
Results/Recommendations :HM was improved by introducing hardiness of Nistari and good characters of NB7 by using 3 way cross breeding.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Multivoltine breeding-Breeding for shorter larval duration strains-Evolution of new multivoltine breeds, MY1 and MY2.
Personnel :Datta RK, Noamani MKR, Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1982-1988
Objectives :To isolate a few multivoltine breeds with shorter larval duration compared to that in Pure Mysore.
Results/Recommendations :Two lines namely MY1 & MY2 have been isolated. Out of these, MY1 has been selected for large scale field trials. As the selected lines have crossed more than 30 generations, the same are maintained as breeding stock and utilized for field trials.
MY1 producing light greenish yellow cocoons, similar to PM and MY2 with dark greenish yellow cocoon similar to HM were isolated. Economic characters like pupation rate, cocoon weight, shell weight and SR percentage were superior.
Source of Information :Annual Report:1983-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Improvement and isolation of multivoltine strains with better qualitative and quantitative characters-Breeding for longer filament length and better fiber characters.
Personnel :Vijayaraghavan K, Rama Mohana Rao P, Premalatha V, Ravindra Singh, Gupta SK
Project Period :1982-1987
Objectives : To evolve breeding of longer filament length and better fiber characters.
Results/Recommendations :Five lines viz., MW1, HMN7, MHN7, MHMP(Y) and MHMP(W) were selected and showed filament length of 771-990 m.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Improvement and isolation of multivoltine strains with better qualitative and quantitative characters-Breeding for shorter larval duration.
Personnel :Vijayaraghavan K, Rama Mohana Rao P, Premalatha V, Ravindra Singh, Gupta SK
Project Period :1982-1987
Objectives : To breed shorter larval duration multivoltine races.
Results/Recommendations :MY1 was selected for large scale field trial.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Improvement and isolation of multivoltine strains with better qualitative and quantitative characters-Breeding for strains with higher cocoon weight and shell weight.
Personnel :Vijayaraghavan K, Rama Mohana Rao P, Premalatha V, Ravindra Singh, Gupta SK
Project Period : 1982-1987
Objectives : To breed strains with higher cocoon weight and shell weight.
Results/Recommendations :Six lines viz., MHMP(Y), HMN7, MY3, P2D1 and P4D1 were isolated. Four breeds selected for farm testing.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Breeding for superior multivoltine strains-Breeding for shorter larval duration strains.
Personnel :Nagaraju J, Premalatha V, Ravindra Singh, Virendra Kumar
Project Period :1982-1987
Objectives :Breeding of multivoltine lines for shorter larval duration.
Results/Recommendations :Two silkworm breeds MY1 and MY2 recorded four days shorter larval duration with significant improvement in economic characters.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Breeding for superior multivoltine strains-Breeding for strains with high cocoon and shell weight.
Personnel :Nagaraju J, Premalatha V, Ravindra Singh, Virendra Kumar
Project Period :1982-1987
Objectives : To breed multivoltine strains with high cocoon and shell weight.
Results/Recommendations :Seven lines viz., MH11, HMN7, MHN7, MHMP(W), MHMP(Y), MW1 and MW2 isolated showed an overall improvement of 43.2% in cocoon weight, 60.24% in shell weight, 20.61% in shell ratio over Pure Mysore.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Isolation of multivoltine strains with better qualitative and quantitative characters compared to Pure Mysore-Breeding for strains with higher cocoon and shell weight.
Personnel :Vijayaraghavan K, Nagaraju J, Premalatha V, Ravindra Singh, Gupta SK
Project Period :1982-1987
Objectives : To breed for strains with cocoon and shell weight.
Results/Recommendations :Out of six lines isolated, MHN7 was identified for multilocational trial.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Isolation of multivoltine strains with better qualitative and quantitative characters compared to Pure Mysore-Isolation of improved multivoltine strains with white cocoon.
Personnel :Vijayaraghavan K, Nagaraju J, Premalatha V, Ravindra Singh, Gupta SK
Project Period :1982-1987
Objectives : To Isolate improved multivoltine strains with white cocoons.
Results/Recommendations :Five lines biz., MW1, MW2, MW3, MHMP(W) and TM1 showed improvement of 6.1 to 46% in cocoon yield, 33.98%, 46.40 in cocoon weight, 57.97 to 71.70% in shell weight and 20.13 to 25.69% in shell ratio over control.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Isolation of multivoltine strains with better qualitative and quantitative characters compared to Pure Mysore-Breeding for longer filament length and better fiber quality.
Personnel :Vijayaraghavan K, Nagaraju J, Premalatha V, Ravindra Singh, Gupta SK
Project Period :1982-1987
Objectives : Isolation of multivoltine lines for higher filament length for better fiber quality.
Results/Recommendations :Five lines viz., HMN7, MHN7, MHMP(W), MHMP(Y) and MW1 with longer filament length were isolated.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Bivoltine breeding-Improvement of bivoltine breeds-Breeding of Chinese type of bivoltine breeds.
Personnel :Iyengar MNS, Basavaraja HK, Vindhya GS, Naseema Begum, Rama Mohana Rao P, Bharadwaj NG
Funding Source :Indo-Swiss Bilateral Proj.
Project Period :1983-1987
Objectives :To evolve superior Chinese type bivoltine breeds.
Results/Recommendations :CA2 (F-28) and CC1 (F-26) are the two new bivoltine breeds. Compared to NB7, CC1 is better in ERR% (3.1%), Shell weight (8.3%) and shell ratio (3.3%). These races were subjected to multilocational trial at Bidadi, Bidaraguppe and Dharmapura.
Source of Information :Annual Report:1983-87
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Bivoltine breeding-Improvement of bivoltine breeds-Breeding of Japanese bivoltine breeds.
Project Period :1983-1987
Objectives :To improve the combining ability of Chinese type races NB7 and KA with Japanese type breeds.
Results/Recommendations :
· NB18 (control) tops in fecundity (639).
· There was not much difference of larval duration.
· NCD recorded 5.6% improvement in ERR (No.) over NB18 and 3.5% over NB4D2.
· JJ1 showed 1.6% improvement over NB4D2 in ERR (weight)
· JK1 recorded 2.9% improvement over NB18 in shell weight.
Source of Information :Annual Report:1983-87
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding of high temperature tolerant breeds-Evolution of hardy bivoltine breeds.
Project Period :1983-1987
Objectives :To evolve bivoltine breeds suitable for the warmer zones of South India.
Results/Recommendations :Five lines viz., CDC2 (F22), DD1 (F22), DD2 (F22), DD3 (F22), KD3 (F22) were reared. Among these lines CDC2, DD2, DD3 are found promising in viability but cocoon characters are poor.
Source of Information :Annual Report:1983-87
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding of high temperature tolerant breeds-Identification of hybrids.
Project Period :1983-1986
Objectives :Screening of suitable hybrids for high temperature conditions.
Results/Recommendations :Hybrids of PCN with approved bivoltine (NB18 and NB4D2) were reared. PCN x NB18 was better by 22.1% in pupation and NB18 x PCN was better by 19.5% in cocoon yield over NB18 under high temperature conditions (32±1°C).
Source of Information :Annual Report:1983-86
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Screening of races-Yield trial of promising bivoltine races- Chinese type and Japanese type.
Project Period :1983-1987
Objectives :To identify productive breeds for isolation of vigorous bivoltine hybrids.
Results/Recommendations : CA2, NBJ, NB7, NB4D1, NB4B1, pure races and NBJ x NB4B, CA2 x NB4B, NB7 x NB18 were reared. NBJ x NB4B fared better than NB7 x NB18 only in respect of shell weight and shell ratio. The hybrid CA2 x NB4B is better in viability (90%) but the control hybrids tops in viability with 95.5%.
Source of Information :Annual Report:1983-87
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title : Supply of breeding stock.
Project Period :1983-1986
Objectives :To rear and supply breeder's stock of approved races
Results/Recommendations :KA, NB4D2, NB7 and NB18 were maintained in 4 seasons to meet the basic seed supply programme.
Source of Information :Annual Report:1983-86
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Multivoltine breeding-Breeding for shorter larval duration strains-Further improvement of indigenous breed Pure Mysore through mutation breeding.
Personnel :Datta RK, Noamani MKR, Nagaraju J, Rama Mohan Rao P, Premalatha V, Ravindra Singh
Project Period :1983-1985
Objectives :Improvement of the breed PM-X evolved earlier through PM egg irradiation for further selection.
Results/Recommendations :PM-X has 2 day's shorter larval duration than that of Pure Mysore. This line was further subjected to selection for early moulting larvae during 4th and 5th instars. A line PMS2 has been isolated with further reduction in larval duration by 2 days. Thus on an average it has 4-5 days shorter larval period than that of Pure Mysore.
Source of Information :Annual Report:1983-85
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Multivoltine breeding-Breeding for shorter larval duration strains-Evolution of superior multivoltine breeds, MW1 and MW2.
Personnel :Datta RK, Noamani MKR, Nagaraju J, Rama Mohan Rao P, Premalatha V, Ravindra Singh
Project Period :1982-1989
Objectives :To evolve multivoltine breeds with higher cocoon and shell weight coupled with better commercial characters.
Results/Recommendations :Five lines namely, MW1, MW2, MW3, MHMP(W) and TM have been isolated from a series of single and three way crosses. MW1 and MW2, superior white multivoltine lines with better quantitative characters over PM were evolved.
Source of Information :Annual Report:1983-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Comparative studies on the performance of bivoltine, multivoltine and traditional hybrids.
Project Period :1982-1983
Objectives :To evaluate the performance of different breeds of silkworm races.
Results/Recommendations :The data collected for 18,635 dfls of multi x bivoltine and 23,100 dfls of traditional races for comparison. The overall economic benefit of bivoltines was Rs.352-31 and Rs.818-19/100 dfls over multi x bivoltine and traditional races respectively.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Performance of Foundation hybrids (PPC Dharmapura).
Project Period :1982-1983
Objectives :To assess the performance of foundation hybrids.
Results/Recommendations :Foundation cross rearings were conducted and an average cocoon yield/100 dfls obtained was 58.9 kg and 7021 cocoons harvested for 10,000 larvae brushed. Average cocoon weight was 1.73 gm, shell weight was 0.358 and average shell ratio was 20.1%.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Bivoltine programme.
Project Period :1982-1983
Objectives :To popularize the bivoltines among the sericulturists.
Results/Recommendations :A quantum of 6614 dfls were distributed and suitable technical guidance in managing the crop was rendered. The average yield was of the order of 28.624 kg/100 dfls. The scheme benefited 43 rearers.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Adoption of rearers for bivoltine popularization.
Project Period :1982-1983
Objectives :To adopt a few rearers and offer technical guidance for a minimum period of one year.
Results/Recommendations :The bivoltine rearings of adopted rearers were frequently inspected and the guidance was rendered. This centre supervised 23,847 dfls of bivoltine rearings, which recorded an average yield of 36.5 kg/unit of 100 dfls reared.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Introduction of new bivoltine hybrids.
Project Period :1982-1983
Objectives: To introduce new bivoltine hybrids in the field.
Results/Recommendations :A total quantity of 3,952 disease free bivoltine layings has been distributed among 53 rearers in 5 taluks. An average yield of 25.87 kg/100 dfls has been obtained fetching a total return for 100 dfls Rs.1,202-18.
Source of Information :Annual Report:1982-83
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Breeding for higher cocoon weight and shell weight in multivoltine breeds-Evolution of multivoltine for better quantitative and qualitative traits.
Personnel :Datta RK, Noamani MKR. Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1982-1989
Objectives :To evolve multivoltine hybrids for better quantitative and qualitative traits.
Results/Recommendations :Two lines, MHN7 and HMN7 showing light greenish yellow cocoons with less floss were isolated.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Breeding for higher cocoon weight and shell weight in multivoltine breeds-Isolation of MHMP(Y) and MHMP(W) lines.
Personnel :Datta RK, Noamani MKR. Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1982-1989
Objectives :To Isolate multivoltine lines with higher cocoon and shell weights.
Results/Recommendations :Two lines one with greenish yellow oval-MHMP(Y) and another white-MHMP(W) lines were isolated.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Breeding of strains for shorter larval duration-Evolution of new multivoltine breeds MY1 and MY2.
Personnel :Datta RK, Noamani MKR. Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1982-1987
Objectives : To evolve new multivoltine breeds MY1 and MY2.
Results/Recommendations :Two silkworm breeds MY1 and MY2 recorded four days shorter larval duration, 100% non-hibernation, with significant improvement in economic characters. The hybrids with bivoltine yielded 18.0-20.0 kg cocoons/10,000 larvae.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Breeding of strains with high cocoon and shell weight-Isolation of superior white multivoltine breeds.
Personnel :Datta RK, Noamani MKR, Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1982-1989
Objectives : To isolate superior white multivoltine breeds.
Results/Recommendations :Two lines MW1 and MW2 showed improvement in cocoon weight (43.69 and 45.77%), shell weight (74.4 and 75.19%) and shell ratio (20.04 and 22.6%) respectively over PM.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Breeding of strains with high cocoon and shell weight-Evolution of superior yellow multivoltine breeds.
Personnel :Datta RK, Noamani MKR. Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1982-1989
Objectives :To evolve of superior yellow multivoltine breeds.
Results/Recommendations :MY3 showed improvement in cocoon weight, shell weight and SR% to the tune of 45.98% and 11.49% respectively over PM.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Breeding of strains with high cocoon and shell weight-Evolution of MHMP(Y) and MHMP(W) multivoltine lines.
Personnel :Datta RK, Noamani MKR. Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1982-1989
Objectives : To evolve MHMP(Y) and MHMP(W) multivoltine lines.
Results/Recommendations :Two lines MHMP(Y) and MHMP(Y) have crossed 13 generations.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Breeding of strains with high cocoon and shell weight-Isolation of multivoltine breeds with better quantitative and qualitative characters.
Personnel :Datta RK, Noamani MKR. Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1982-1989
Objectives :To Isolate multivoltine breeds with better quantitative and qualitative characters.
Results/Recommendations :The lines MHN7 and HMN7 were crossed for 10 generations.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Breeding of strains with high cocoon and shell weight-Isolation of promising multivoltine lines out of ‘AP-PA’ series.
Personnel :Datta RK, Noamani MKR. Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1982-1989
Objectives :To evolve multivoltine lines with higher cocoon and shell weight.
Results/Recommendations :Fourteen ‘AP-PA’ lines were reduced to 4 and are under fixation.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Multivoltine breeding-Breeding for shorter larval duration strains-Isolation of promising lines out of AP-PA series.
Personnel :Datta RK, Noamani MKR, Nagaraju J, Rama Mohan Rao P, Premalatha V, Ravindra Singh
Project Period :1983-1985
Objectives :To identify some promising lines of AP-PA series.
Results/Recommendations :14 lines of the AP-PA series are grouped into 4 lines in total, by interline crossings. The average values in respect of single cocoon weight, shell weight, shell ratio, ERR and yield were 1.55 g, 0.24 g, 15.5% and 9279 and 14.37 kg respectively.
Source of Information :Annual Report:1983-85
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Multilocational trials-Screening of improved multivoltine hybrids.
Project Period :1983-1986
Objectives :To study the performance of improved multivoltine hybrids through multilocational trials.
Results/Recommendations :Under this programme, 10 hybrid combinations of CB1 to CB6 and CB9 to CB12 were studied for their rearing performance. Except for the CB5, CB6 and CB11, 90% ERR was recorded in all the remaining races.
Source of Information :Annual Report:1983-86
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Biometrical genetics studies-Exploitation of heterosis among multivoltine races.
Personnel :Pershad GD, Vijayakumar HV, Bhargava SK
Project Period :1983-1985
Objectives :To analyze biometrically the performance of nine multivoltine races which included both indigenous and evolved multivoltine races during four rearing seasons for six independent characters.
Results/Recommendations :Six multivoltines races were evaluated Mysore Princess for fecundity, cocoon yield, shell percentage and filament length, PCN for shorter larval duration and Nistari for pupation rate are better over other races studied.
Source of Information :Annual Report:1983-85
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Biometrical genetics studies-Genotype x Seasonal interaction studies.
Personnel :Pershad GD, Vijayakumar HV, Bhargava SK
Project Period :1983-1984
Objectives: To study biometrical genetics -Genotype x Seasonal interaction.
Results/Recommendations :17 economic characters were used to select robust races for different seasons. Highly significant seasonal variations were found for pupation rate in Pure Mysore, Mysore Princess, Nistari, PCN, NN6D and Mora. All the characters showed highly significant interaction for season and races individually and highly significant race x season interactions were observed for yield/10,000 larvae by number and weight and shell percentage.
Source of Information :Annual Report:1983-84
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Combining ability analysis in multivoltine races.
Personnel :Pershad GD, Vijayakumar HV, Bhargava SK
Project Period :1983-1985
Objectives :To analyze combining ability of the nine multivoltine silkworm races viz., Pure Mysore, Hosa Mysore, Kollegal Jawan, Mysore Princess, Nistari, PCN, NN6D Sarupat and Moria in a 9 x 9 diallel for six important economic characters in three seasons.
Results/Recommendations :Quantities for both general and specific combining ability were significant at 1% level for all the traits. However, the Baker's ratio ranged from 0.91 to 0.97 except for fecundity indicating sufficient GCA effect in these races to make successful selection for cocoon yield and higher survival rate. Most of the indigenous and exotic multivoltine races proved good specific combiner. Positive reciprocal effects in Hosa Mysore suggests the accumulation of cytoplasmic genes.
Source of Information :Annual Report:1983-85
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on sex-linked cocoon characters in multivoltine races.
Project Period :1983-1984
Objectives :To determine differences in sex, race and race x sex interactions.
Results/Recommendations :Multivoltine males showed higher heritability than females for single shell weight and raw silk content but for floss percentage, females have higher heritability than males.
Source of Information :Annual Report:1983-84
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Heritability and genetic advance studies in multivoltine races.
Project Period :1983-1984
Objectives: To study the heritability traits and genetic advance in multivoltine races.
Results/Recommendations :Heritability and genetic advance studies among 9 multivoltine races for their economic characters were made. High heritability estimates were observed for total larval duration, 5th age larval duration, yield by weight, single cocoon weight, single shell weight and raw silk content. The high genetic advance estimates were obtained for single shell weight, raw silk content, filament length and low genetic advance estimates for total larval duration, 5th age larval duration, yield/10,000 larvae (by wt) and single cocoon wt.
Source of Information :Annual Report:1983-84
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Field trial of the new hybrids-Field trial of PCN hybrids.
Personnel :Nagaraja CS, Basavaraja HK, Rama Mohana Rao P
Project Period :1983-1988
Objectives :To test the new hybrids at different locations.
Results/Recommendations :
· PCN pure and its hybrids were continued to be tested at different centres and field performance, in rainfed areas of Karnataka viz., Chamarajanagar and Mugur.
· PCN hybrids 3,73,489 (dfls) 20.22 yld/100 dfls (kg), 50.10 rate/Karnataka (Rs), 1013.68 return/100dfls (Rs).
Source of Information :Annual Report:1986-87, 1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Multilocational tests of newly evolved multivoltine silkworm breeds.
Project Period :1983-1985
Objectives : To test newly evolved multivoltine silkworm breeds at different test centers.
Results/Recommendations :Among the yellow cross breeds, CB4 was found to be significantly superior showing shortest larval duration (26 days) with 93.5% survival, prominently good cocoons (1.457 g cocoon wt and 19.35% shell ratio). Among white cross breeds, CB5 found to be good with larval duration of 26 days and 93.35% survival, cocoon weight, shell ratios were 1.480 g and 20.13% respectively.
Source of Information :Annual Report:1983-85
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title : Supply of foundation crosses (Coonoor).
Project Period :1983-1984
Objectives :To obtain crop stability through high degree of heterosis.
Results/Recommendations : A total quantity of 160 dfls was reared and an average yield of 60.3 kg and 61.9 kg were obtained for KA x NB7, NB4D2 x NB18 respectively.
Source of Information :Annual Report:1983-84
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Evaluation of silkworm races for pre and post cocoon and other characters-Evaluation of multivoltine breeds.
Personnel :Pershad GD, Vijayakumar HV, Bhargava SK
Project Period :1983-1984
Objectives : To evolve multivoltine breeds.
Results/Recommendations :Performance of 5 multivoltine races (Mysore Princess, Hosa Mysore, Kollegal Jawan, Nistari and PCN) was analysed out of which Mysore princess was found to be superior.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Bivoltine Breeding-Evolution of sex-limited bivoltine breeds.
Project Period :1984-1987
Objectives :To evolve viable bivoltine breeds with sex-limited larval marking.
Results/Recommendations : Among Chinese type sex-limited races, TC1 fared better in respect of all traits. Among Japanese types NN2 showed better viability and shell ratio %.
Source of Information :Annual Report:1984-87
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine Breeding-Multilocation trials of the newly evolved breeds and their hybrids.
Personnel :Datta RK, Noamani MKR, Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1983-continued
Objectives :To evaluate the multivoltine hybrids for MLT.
Results/Recommendations :The evolved breeds and their hybrids were tested at RSRS, Salem and at farmers level. An average yield of 70.6 kg and 66.8 kg for 100 dfls were recorded by MW1 x CA2 and MW1 x NB4D2 respectively.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Multilocational trial of newly evolved multivoltine breeds and their hybrids
Personnel :Datta RK, Noamani MKR, Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1983-continued
Objectives :To evaluate the multivoltine hybrids for MLT.
Results/Recommendations :Out of the new breeding plans initiated in 1982, 4 promising multivoltine breeds viz., MY1, MY2 and MW2 and their hybrids with 2 controls were tested in Karnataka and Tamil Nadu.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Breeding for higher cocoon weight and shell weight in multivoltine breeds-Further improvement of ‘A’ plan lines.
Personnel :Datta RK, Noamani MKR. Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1983-1986
Objectives :Breeding of multivoltine lines for higher cocoon and shell weights.
Results/Recommendations :Twelve ‘A’ plan lines were grouped into 2 lines.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Breeding of strains for shorter larval duration-Improvement of the breed PM-X through selection.
Personnel :Datta RK, Noamani MKR. Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1983-1986
Objectives :To evolve multivoltine breeds for shorter larval duration.
Results/Recommendations :The isolated line PMS2 showed 4-5 days shorter larval duration compared to PM.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Bivoltine Breeding-Evaluation of multivoltine and bivoltine silkworm races for pre and post harvest cocoon and other characters-Combining ability analysis in MV x BV races.
Personnel :Pershad GD, Vijayakumar HV, Bhargava SK
Project Period :1984-1987
Objectives :To study the combining ability quantities for six characters among hybrids of five multivoltine races and three bivoltine races in a 8 x 8 partial diallel crosses including reciprocals and selection of the best combiners in replacing the existing hybrids as well as in the utilization in heterosis breeding programme.
Results/Recommendations :Hybrid rearing trials of seven improved multivoltine with NB7 and NB18 were conducted. Hybrids P4D1 x NB18 and MHMP (W) x NB18 excelled the better parent for most of the characters. HMN7 x NB18, MHN7 x NB18 were superior to better parent only for ERR.
Source of Information :Annual Report:1984-87
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title : Evaluation of multivoltine and bivoltine silkworm races for pre and post harvest cocoon and other characters-Exploitation of heterosis-(a) Among multivoltine hybrids.
Personnel :Pershad GD, Vijayakumar HV, Bhargava SK
Project Period :1984-1985
Objectives :Heterosis studies for nine selected indigenous, exotic and evolved multivoltine races to identify high yielding hybrids in the breeding programme and assessment against the best parent for percentage gain in heterosis during different rearing seasons.
Results/Recommendations :Repeatability for higher yielding hybrids for heterosis were not uniform during all the rearing seasons and they must be exploited for each season.
GCA and SCA was analysed using 9 multivoltine races in a 9 x 9 diallel for 6 characters in 3 seasons. Mysore Princess followed by Kollegal Jawan were found to be good combiners.
Source of Information :Annual Report:1984-85
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evaluation of multivoltine and bivoltine silkworm races for pre and post harvest cocoon and other characters-Exploitation of heterosis-b) Among Multivoltine x Bivoltine Hybrids.
Personnel :Pershad GD, Vijayakumar HV, Bhargava SK
Project Period :1984-1985
Objectives :Heterosis studies for five multivoltine and three bivoltine races to identify high yielding multi x bivoltine hybrids and assessment against the best parent for percentage gain in heterosis.
Results/Recommendations :Five multivoltines and three bivoltine in a 8 x 8 diallel crosses were analyzed. GCA estimates indicated that HM, MP and NB7 were good combiners. Nistari x NB7, PCN x NB7 and MH x NB4D2 had better SCA. Heterosis was evaluated multivoltine hybrids, MV x BV the hybrids and (multi x multi) x BV (3-way crosses). The 3 way crosses were found to be not significantly better than multi x bi hybrids.
Source of Information :Annual Report:1984-85
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evaluation of multivoltine and bivoltine silkworm races for pre and post harvest cocoon and other characters-Exploitation of heterosis-c) Among (Multi x Multi) x Bivoltine hybrids.
Personnel :Pershad GD, Vijayakumar HV, Bhargava SK
Project Period :1984-1985
Objectives :Heterosis studies in three-way crosses (multi x multi) x bivoltine hybrid in selected multivoltine hybrids with three bivoltine races, to evaluate their performance.
Results/Recommendations :Cocoon yield performance of any of the three way hybrids was not significant compared to multi x bi crosses. However, (Kollegal Jawan x Sarupat) x NB18, (HM x Nistari) x NB18 and (Mysore Princess x Nistari) x NB18 showed significant (at 1% level) heterosis.
Source of Information :Annual Report:1984-85
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title : Studies on isolation of improved multivoltine strains with white cocoons.
Project Period :1984-1987
Objectives :To isolate superior white multivoltine breeds.
Results/Recommendations :Five lines namely MW1, MW2, MW3, MHMP (w) and TM were isolated as superior white multivoltines.
Source of Information :Annual Report:1986-87
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Screening of bivoltine varieties in rainfed conditions-Studies on the performance of popular bivoltines reared on rainfed mulberry.
Project Period :1984-1985
Objectives :To assess the silkworm rearing performance, in different seasons on rainfed mulberry.
Results/Recommendations :Two races viz., NB7 and NB18 were reared on K2 variety of mulberry. The average cocoon yield/100 dfls in NB7 and NB18 was 48.1 kg and 43.6 kg respectively.
Source of Information :Annual Report:1984-85
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance of popular bivoltines.
Project Period :1984-1985
Objectives :To maintain the germplasm as well as to evaluate the rearing performance in successive generations under rainfed conditions.
Results/Recommendations :The station has started the maintenance of germplasm with 2 popular bivoltines namely NB7 and NB18. The average yields recorded was 12.179 kg and 9.287 kg/10,000 larvae for NB7 and NB18 respectively with 1.493 and 1.535 gm cocoon wts. & 18.96 and 20.32% shell ratios.
Source of Information :Annual Report:1984-85
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Screening of multi x bi hybrids. (RSRS, Salem)
Personnel :Vijayaraghavan K, Srinivasa Murthy K, Das PK
Project Period :1984-1985
Objectives : To screen multi x bi hybrids for their performance.
Results/Recommendations : CB1 and CB12 hybrid combinations were prepared and the rearing performance was studied in 5 seasons. The performance of all the combinations were better with more than 80% ERR during all the seasons and the yield of cocoons ranged from 35 to 55 kg/100 dlfs.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Studies on evaluation of silkworm races for pre ad post cocoon and other characters-Performance of multivoltine races.
Personnel :Pershand GD, Vijayakumar HV, Bhargava SK
Project Period :1984-1985
Objectives : To evaluate the rearing performance of multivoltine races during different seasons.
Results/Recommendations :Performance of 9 multivoltine races during four seasons for 6 characters was analyzed. Mysore Princess was evaluated assuperior for fecundity, cocoon yield, shell percentage and filament length. PCN was found to be superior for shorter larval duration and Nistari for pupation rate.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine Breeding-Study on the post cocoon parameters in the evolved breeds.
Personnel :Datta RK, Noamani MKR, Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1984- continued
Objectives : To study the post cocoon parameters in the evolved multivoltine breeds.
Results/Recommendations :MY2 recorded highest reelability (76.7%) and MW2 recorded lowest renditta (8.2), MW2 x NB18 recorded highest filament length (1140 mt); PA11 x NB4D2 recorded highest reliability (90.8%) and MN1 x NB7 recorded highest neatness (94.5)
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Breeding of strains with high cocoon and shell weight-Evolution of white multivoltine breeds.
Personnel :Datta RK, Noamani MKR. Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1984-1989
Objectives : To evolve white multivoltine breeds spinning white coloured cocoons.
Results/Recommendations :The experiment was initiated by crossing yellow multivoltines with white multivoltines to evolve white multivoltine breeds.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Breeding of strains with high cocoon and shell weight-Improvement of ‘A’ plan lines.
Personnel :Datta RK, Noamani MKR. Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1984-1989
Objectives : To breed strains with high cocoon and shell weight.
Results/Recommendations :Twelve ‘A’ plan lines reduced to 4 were under fixation.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding for superior multivoltine strains-Breeding for higher filament length and better fibre characters.
Personnel :Nagaraju J, Premalatha V, Ravindra Singh, Virendra Kumar
Project Period :1985-1988
Objectives :To improve filament length and fibre quality of promising multivoltine breeds.
Results/Recommendations :Five lines namely, MW1, HMN7, MHN7, MHMP(Y) and MHMP(W) have been selected and subjected to cold reeling for 13 generations. The filament length ranges from 691-801m in MHN7, 831 m in MHMP (W), 631-731m in MW1, 656-782 m in MHMP(Y).
Source of Information :Annual Report:1985-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evaluation of Pure lines for combining ability and heterosis.
Personnel :Nagaraju J, Premalatha V, Ravindra Singh
Project Period :1985-1989
Objectives :To evaluate some multivoltine pure lines for combining ability with bivoltine male parents.
Results/Recommendations :Six multivoltine breeds viz., MY1, MY2, MW1, MW2, PM and HM were evaluated through Line x Tester analysis. Among hybrids MY2 x NB7, PM x NB1 and MY1 x NB18 were best specific combiners for pupation rate.
Source of Information :Annual Report:1985-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Multilocational trial of promising pure lines and their hybrids.
Personnel :Nagaraju J, Premalatha V, Ravindra Singh, Virendra Kumar
Project Period :1985-1988
Objectives :To evaluate the performance of new hybrid combinations at different locations.
Results/Recommendations :MY1 x Bivoltine hybrids are being tested systematically in large scale with farmers of Karnataka, Tamil Nadu and Andhra Pradesh through CSR&TI Research Extension Centres. So far 1.2 lakh dfls have been reared.
Source of Information :Annual Report:1985-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Silkworm Genetics-Evolution of commercially important characters of multivoltine and bivoltine breeds and their hybrids-Biometric evaluation of performance estimates of 6 promising bivoltine breeds (NB4D2, NB7, NB18, KA, CC1 & CA2) and their hybrids by following 6 x 6 full diallel system.
Personnel :Pershad GD, Vijayakumar HV, Bhargava SK
Project Period :1985-1986
Objectives :To evaluate the statistical significance of the difference of the performance of 6 breeds and to determine the scope of exploitation of heterotic vigour.
Results/Recommendations :Diallel analysis for the 6 characters of the rearing performance of 6 bivoltine breeds viz., NB7, NB18, KA, CC1 and CA2 was made and the data revealed the superiority of NB4D2 and NB7 for cocoon yield and viability. Analysis of the rearing performance of 30 F1 hybrids shows that following hybrids are superior for one or more characters. For example, NB18 x CC1 and NB7 x CA2 showed higher cocoon yield (18.714 kg) and viability when compared to the hybrids being exploited at field level (17.0 to 17.5 kg). Diallel analysis revealed that greater amount of genetic variability can be generated through hybridization indicating the scope of broadening the genetic base through hybridization.
Source of Information :Annual Report:1985-86
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Line x Tester analysis.
Personnel :Pershad GD, Vijayakumar HV, Bhargava SK
Project Period :1985-1986
Objectives :To analyze combining ability of multivoltine and bivoltine races line x tester analysis was done using three multivoltine races, as lines and two bivoltine races as testers.
Results/Recommendations :High GCA estimates were observed in Hosa Mysore and CC1 for cocoon yield, pupation rate and single cocoon weight, whereas high GCA estimates were obtained for shell ratio (%) in Hosa Mysore and NB4D2. Hosa Mysore x NB4D2 (97.9%), Mysore Princess x CC1 (97.6%), Pure Mysore x CC1 (96.6%), Pure Mysore x NB4D2 (95.4%) all for viability.
Source of Information :Annual Report:1985-86.
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Combining ability analysis in bivoltine breeds.
Personnel :Pershad GD, Sudhakaran M, Bhargava SK
Project Period :1985-1986
Objectives :To analyze combining ability in 6 x 6 diallel system (6 bivoltine races and their 30 F1 hybrids).
Results/Recommendations :High GCA estimates were observed in CA2 for cocoon yield, pupation rate (%) and shell ratio % in NB18 for single shell weight, single cocoon weight and shell ratio (%), in CC1 for fecundity and pupation rate (%) in KA for fecundity and single cocoon weight and in NB4D2 for cocoon yield.
Source of Information :Annual Report:1985-86
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Improvement of Bivoltine breeds-Plan CH1 (F13), CPC1 (F10), CAC (F10).
Personnel :Nagaraj CS, Basavaraja HK, Rama Mohana Rao P
Project Period :1985-1987
Objectives :To evolve bivoltine breeds of Chinese type (Oval).
Results/Recommendations :There is a need to improve viability/cocoon traits in respect of CPC1 and CAC as their performance are of lower order compared to NB7 and KA.
Source of Information :Annual Report:1986-87
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Field trial of the new hybrids - CC1 hybrids.
Personnel :Nagaraj CS, Basavaraja HK, Rama Mohana Rao P
Project Period :1985-1987
Objectives :To test the performance of the new bivoltine hybrids in the laboratory.
Results/Recommendations :CC1 x NB4D2 has fared well in cocoon characters.
Source of Information :Annual Report:1986-87
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Large scale testing of new bivoltine hybrids.
Project Period :1985-1986
Objectives :To evaluate the performance of the newly evolved bivoltine hybrids (of CSRTI, Mysore).
Results/Recommendations :The rearing trials were conducted with five different new bivoltine hybrids and revealed that the hybrids 3 x 9 and 6 x 12 are better yielders (i.e., 70.9 and 70.7 kg/100 dfls respectively).
Source of Information :Annual Report:1985-86
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Large scale field trials of PCN hybrids.
Project Period :1985-1989
Objectives :To popularize the rearing of PCN hybrids in rainfed areas.
Results/Recommendations :The station through its five chawki rearing centres has chawki reared and distributed 53,044 PCN hybrid dfls and obtained an average yield of 19.50 kg/100dfls. On the other hand, 9040 PCN hybrid dfls were directly distributed among the farmers which showed an average yield of 19.93 kg/100dfls compared to general rearing data of 64805 dfls of traditional crosses (PM x C-Nichi) which resulted in an average yield of 16, 127 kg/100 dfls.
Source of Information :Annual Report:1985-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Screening of improved multivoltine hybrids.
Project Period :1985-1986
Objectives :To study the performance of improved multivoltine hybrids through multilocational trials.
Results/Recommendations :10 hybrid combinations of CB1 to CB6 and CB9 to CB12 were prepared and their rearing performance was studied under the farm and field conditions. Except for the CB5, CB6 and CB11, 90% ERR was recorded in all the remaining races.
Source of Information :Annual Report:1985-86
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Production and supply of new hybrids for field test.
Personnel : Biram Saheb NM, Ramesh Babu M, Negi BSS
Project Period :1985-1986
Objective: To produce and to supply new hybrids for field test.
Results/Recommendations :PCN, a new hardy bivoltine race specific to rainfed mulberry and two new Chinese type bivoltine races like CA2 & CC1 these two for commercial field test, a total quantity of 27,950 hybrid dfls supplied as loose eggs. 52,455 dfls involving PCN cross with NB18, NB4D2 and their reciprocals were prepared and supplied for field test.
Source of Information :Annual Report:1985-86
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Introduction of sex-limited larval markings in promising multivoltine breeds-Evolution of sex-limited breeds.
Personnel :Datta RK, Noamani MKR. Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh
Project Period :1985-1989
Objectives : Breeding of sex-limited lines.
Results/Recommendations :For the evolution of promising sex-limited lines, breeding was initiated by using PM and AP1(SL).
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Improvement and isolation of multivoltine strains with better qualitative and quantitative characters-Isolation of sex-limited multivoltine breeds.
Personnel :Vijayaraghavan K, Rama Mohana Rao P, Premalatha V, Ravindra Singh, Gupta SK
Project Period :1985-1988
Objectives : To isolate sex-limited multivoltine breeds.
Results/Recommendations :Three breeds were reared and study of sex-ratio indicated no significant difference between normal and sex-limited strains.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Isolation of multivoltine strains with better qualitative and quantitative characters compared to Pure Mysore-Introduction of sex-limited character in multivoltine silkworm breeds.
Personnel :Vijayaraghavan K, Nagaraju J, Premalatha V, Ravindra Singh, Gupta SK
Project Period :1985-1989
Objectives : To introduce sex-limited characters in multivoltine silkworm breeds.
Results/Recommendations :Sex-limited character was introduced into MY1 and MY2 (SL) was evolved. PM(SL) was selected for field trial.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Silkworm crop improvement-Introduction of sex-limited larval markings in multivoltines-Evolution of sex-limited larval marker strains.
Personnel :Vijayaraghavan K, Kannantha V, Nagaraju J, Rama Mohana Rao P Premalatha V, Ravindra Singh, Gupta SK
Project Period :1985-1990
Objectives : To evolve sex-limited larval marker strains of multivoltine.
Results/Recommendations :Two sex-limited multivoltine silkworm breeds PM(SL) and MY(SL) evolved earlier were continued.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Breeding for superior multivoltine strains-Introduction of sex-limited larval markings in promising breeds.
Personnel :Nagaraju J, Premalatha V, Ravindra Singh, Virendra Kumar
Project Period :1985-1989
Objectives : To introduce of sex-limited larval markings in promising breeds.
Results/Recommendations :A new multivoltine larval sex-limited breed PM(SL) was isolated.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on test reeling cocoons and quality assessment of raw silk.
Project Period :1985-1986
Objective: To study the post-cocoon parameters of new hybrids.
Results/Recommendations :The average renditta obtained for bivoltine cocoons and multi x bi cocoons ranged from 7.1 to 10.1 and from 7.8 to 14.8 respectively. Among the bivoltine races CA2 x JA2 and CC1 x JA2 were observed to be much promising as they registered 6.3 and 6.9 renditta. Multi x bi hybrids viz., MY1 x KA, HM x CA2 & MW2 x NB18 have yielded higher quantity of raw silk recording 7.1, 6.8 and 7.4 renditta as compared to pure multivoltines.
Source of Information :Annual Report:1985-86
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Screening of races-Yield trials.
Personnel :Nagaraj CS, Basavaraja HK, Rama Mohana Rao P
Project Period :1986-1987
Objectives :To identify productive bivoltine breeds.
Results/Recommendations :CA2, NBJ, NB7, NB4D2, NB4B, pure races were reared. Hybrids of NBJ x NB4B, CA2 x NB4B, NB7 x NB18 were also reared. NBJ x NB4B fared better than NB7 x NB18 only in respect of shell weight and shell ratio. The hybrid CA2 x NB4B is better in viability (90.0%) but the control hybrids tops in viability with 95.5%.
Source of Information :Annual Report:1986-87
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Shell weight improvement by using sex-limited mates. CC1 x TC1(F3), NB7 x NC1 (F3) NB4D2 x HN1 (F3).
Personnel :Nagaraj CS, Basavaraja HK, Rama Mohana Rao P
Project Period :1986-1989
Objectives :To improve the shell weight of the promising breeds.
Results/Recommendations :Various lines viz., CAC, CPC and CPP1 were evolved. These two lines are not showing any significant improvement over NB7.
Source of Information :Annual Report:1986-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evaluation of sex limited strains for larval and cocoon colour.
Personnel :Nagaraj CS, Basavaraja HK, Rama Mohana Rao P
Project Period :1986-1988
Objectives :To evolve sex limited cocoon coloured breeds.
Results/Recommendations :The sex-limited females of WYP of Golden yellow colour were crossed with CC1 and NB4D2 males to introduce sex-limited character in these two breeds (CC1& NB4D2) the sex-limited character has been achieved and now the attempts are to develop the robustness of the breeds. The two breeds i.e., CC1 and NB4D2 are sex-limited at cocoon stages.
Source of Information :Annual Report:1986-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Chinese type viability improvement-CSV1 (F5), CSV2 (F5), CSC3 (F5).
Personnel :Nagaraj CS, Basavaraja HK, Rama Mohana Rao P
Project Period :1986-1988
Objectives :To improve pupation rate in Chinese type breeds.
Results/Recommendations :The overall performance of the breeds was not remarkably higher than that of NB7 and as such the productivity/viability of the breeds are to be improved through selection. However, the ERR% of CAC was higher (2.2%) to that of NB7 and the SR% was also higher (4.9%).
Source of Information :Annual Report:1986-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Japanese type viability improvement JSV1 (F6), JSV2 (F5), JSV5 (F4), JSV6(F5), JSV7 (F4), JHS2(F6).
Project Period :1986-1988
Objectives :To improve the viability in Japanese type breeds.
Results/Recommendations :Among the seven breeds, JSV7 showed higher viability (12.8 and 15.6%) when compared to NB18 and NB4D2 respectively. But the SR% was lower when compared to the popular breeds. Although the cocoon characters are on par with NB18 and NB4D2, the ERR% of JSV2 is higher than that of the controls.
Source of Information :Annual Report:1986-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Improvement of hardy bivoltine PCN.
Personnel :Nagaraj CS, Basavaraja HK, Rama Mohana Rao P
Project Period :1986-1988
Objectives :To improve the commercial characters of PCN.
Results/Recommendations :The overall performance of the breed is better than PM.
· Fecundity is higher in PCN (16.5%) than PM.
· ERR is higher in PCN (16.8%) than PM.
· Cocoon weight is higher in PCN (20%) than PM.
· Shell weight is higher in PCN (15.2%) than PM.
Source of Information :Annual Report:1986-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Genetic divergence studies.
Personnel :Nagaraj CS, Basavaraja HK, Rama Mohana Rao P
Project Period :1986-1987
Objectives :To know the genetic divergence of the available bivoltine breeds.
Results/Recommendations :As per the recommendations, the analysis of 49 bivoltine strains were conducted. Canonical vector values indicated that the importance of yield/10000 larvae, eggs/dfls and larval duration largely contributed to genetic divergence.
Source of Information :Annual Report:1986-87
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on induced mutation in silkworms-Utilization of induced mutation in multivoltine silkworm.
Personnel :Vijayaraghavan K, Nagaraju J, Premalatha V, Kannantha V, Rama Mohan Rao P, Ravindra Singh, Gupta SK
Project Period :1986-1989
Objectives :To generate desirable variability and introduce specific characters which may be lacking in parents of productive breeds.
Results/Recommendations :The experiment was conducted with C-Nichi. Five radiation (gamma) doses 500, 1000, 1500, 2000 and 2500R have been tried. Two embryonic stages 48 and 144 hours old eggs have been utilized. The treated lines were continued for four generations.
Source of Information :Annual Report:1986-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on improved multivoltine x bivoltine hybrid performance.
Personnel :Vijayaraghavan K, Nagaraju J, Premalatha V, Ravindra Singh, Chatterjee GK
Project Period :1986-1987
Objectives :To evaluate some multivoltine pure lines for combining ability with bivoltine male parents.
Results/Recommendations :Hybrids viz., P4D1 x NB18 and MHMP (W) x NB18 excelled the better parent for most of the characters. HMN7 x NB18 and MHN7 x NB18 were superior to better parent only for ERR.
Source of Information :Annual Report:1986-87
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on three way crosses.
Personnel :Vijayaraghavan K, Nagaraju J, Premalatha V, Ravindra Singh, Chatterjee GK
Project Period :1986-1988
Objectives :To study the comparative performance of viability and other qualitative traits.
Results/Recommendations :
· The statistical analysis indicate no significant differences between three way and single cross. Single cross was better for shell weight and shell ratio.
· Three way crosses involving (multi x bi) x bivoltine were also tried at CSRTI. The results are fecundity, hatching %. LD, ERR is high in this combination (MY1 x NB7) x NB18.
Source of Information :Annual Report:1986-87, 1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Multilocational trial of new multivoltine strains MY1.
Personnel :Vijayaraghavan K, Nagaraju J, Premalatha V, Ravindra Singh, Chatterjee GK
Project Period :1986-1989
Objectives :To evaluate the performance of newly evolved multivoltine strains MY1 at different locations.
Results/Recommendations :1.2 lakh dfls have been reared. The performance of MY1 hybrids at different centres-overall average is as follows:
· MY1 hybrids - 167734 (dfls), 57061.75 (yield in kg), 34.00 (yield/100dfls), 82.96 [rate/kg (Rs)], 2820.65 [Return/100dfls (Rs)].
· PM hybrids-167734 (dfls), 57061.75 (yield in kg), 31.60 (yield/100dfls), 77.66 (Rate/kg), 2454.10 [Return/100dfls (Rs)].
Source of Information :Annual Report:1986-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Biometrical genetic studies in multivoltine and bivoltine silkworms-Analysis of phenotypic and genotypic variance in multivoltine and bivoltine silkworms.
Personnel :Chatterjee SN, Shivakumar GR, Bhargava SK, Damodara Naidu W, Chatterjee GK
Project Period :1986-1990
Objectives :To estimate the genetic variability, heritability and genotypic environmental interactions.
Results/Recommendations : Both multivoltine and bivoltine silkworms were involved in the study. The heritability estimates were done through parent offspring regression. The broad sense heritability estimates were calculated for larval period (18-22%), larval weight (15-20%), survival (22-26%), cocoon yield (58-62%) and filament length (63-70%).
Source of Information :Annual Report:1989-90
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Genetic Cocoon colour-Inheritance of cocoon colour in multivoltine crosses.
Personnel :Chatterjee SN, Shivakumar GR, Rao CGP, Damodara Naidu W, Chatterjee GK
Project Period :1986-1988
Objectives : To analyze the inheritance of cocoon colour vis-a-via blood colour.
Results/Recommendations :Multivoltine races, Pure Mysore showed the highest activity whereas Nistid the lowest and the enzyme concentration ranges from 0.695-0.340 in multivoltines. This variation in the enzyme activity from race to race can be attributed to genotypic differences.
Source of Information :Annual Report:1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Genetical studies on voltinism-Inheritance of voltinism in multivoltine x bivoltine and bivoltine x bivoltine races.
Personnel :Chatterjee SN, Shivakumar GR, Bhargava SK
Project Period :1986-1987
Objectives :To study the genetics of voltinism in relation to eco-climatic variation.
Results/Recommendations :The analysis of the data revealed that KA x NBH (PO) and its reciprocal showed 100% hibernating character when F1 and F2 layings were observed. It was also noted that in F3 47.8% were hibernating and 52.2% non-hibernating layings, out of which 36.5% were white egg and 14.4% were yellow eggs.
Source of Information :Annual Report:1986-87
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Biochemical genetics-Screening of bivoltine and multivoltine races for haemolymph protein and amylase activity.
Personnel :Chatterjee SN, Shivakumar GR, Bhargava SK
Project Period :1986-1988
Objectives : To provide a new dimension towards recombination breeding.
Results/Recommendations :The Enzyme concentration in bivoltines ranges from 0.175-0.370. Among multivoltine races, Pure Mysore showed the highest activity whereas Nistid the lowest and the enzyme concentration ranges from 0.695-0.340 in multivoltines. This variation in the enzyme activity from race to race can be attributed to genetic differences.
Source of Information :Annual Report:1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Improvement and isolation of multivoltine strains with better quantitative and qualitative characters-Studies on induced mutation in silkworm.
Personnel :Vijayaraghavan K, Ram Mohana Rao P, Premalatha V, Kannantha V, Nagaraju J, Ravindra Singh, Gupta SK
Project Period :1986-1989
Objectives :To generate desirable variability and introduce specific characters which may be lacking in parents of productive breeds.
Results/Recommendations :The experiment was conducted with C-Nichi. Five radiation (gamma) doses: 500, 1000, 1500, 2000 and 2500R have been tried. Two embryonic stages 48 and 144 hours old eggs have been utilized. The treated lines were continued for four generations.
Source of Information :Annual Report:1987-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance of approved Bivoltine races.
Project Period :1986-1986
Objectives :To maintain stock races for utilization in different experiments.
Results/Recommendations :Four approved bivoltine races, viz, KA, NB7, NB18 and NB4D2 were reared in four batches during the period and the average yield/100 dfls varied from 50.9 kg to 58.1 kg. The highest ERR recorded was in NB7.
Source of Information :Annual Report:1986-87
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Testing of newly evolved silkworm hybrids (RSRS, Kodathi).
Personnel :Ramesh SP, Narasimhamurthy N
Project Period :1986-1988
Objectives :To recommend suitable hybrid for commercial exploitation.
Results/Recommendations :It was observed that PCN hybrids recorded higher ERR of 95.3% and its reciprocal showed 82.2% with yields of 12.6 and 11.2 kg/1000 larvae respectively. But PM cross yielded much higher upto 14.5 kg followed by MY1 14.3 kg/10000 larvae. However, there was no significant variation in SR%.
Source of Information :Annual Report:1986-87, 1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on the use of bivoltine F1 hybrids as male parent in the multivoltine cross layings preparation.
Project Period :1986-1988
Objectives :To study the performance of F2 hybrids when multivoltine female is crossed with F1 bivoltine hybrid.
Results/Recommendations :Two trials were conducted and clear difference in yield was observed between single and double crosses and the use of bivoltine hybrids as male parent in cross breed preparation has not shown any adverse effect on the yield and quality of cocoons.
Source of Information :Annual Report:1986-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Large scale field trials of PCN hybrids.
Personnel :Gururaj R, Dandin SB, Parthasarathy BS, Tripathi PM, Ashwath SK, Shivareddy, Raghavendra M, Raje Urs.
Project Period :1986-1989
Objectives :To popularize the rearing for PCN hybrids in rainfed areas.
Results/Recommendations :PCN hybrid was put under trial to replace PM x C.Nichi the traditional hybrid. 1.52 lakh dfls of PCN hybrid were supplied to the sericulturists and compared it to the performance of CB and the traditional hybrid.
9040 PCN hybrid dfls were directly distributed among the farmers which showed an average yield of 19.930 kg.100 dfls compared to general rearing data of 64805 dfls of traditional crosses (PM x C.Nichi) which resulted in an average yield of 16.127 kg/100 dfls.
Source of Information :Annual Report:1986-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Improving the sericultural productivity under rainfed/semi irrigated condition-Development of package of practices for mulberry-Production of two/three way cross. (RSRS, Kodathi)
Personnel :Saratchandra B, Ramesh SP, Narasimha Murthy N
Project Period :1986-1988
Objectives : To develop package of practices for mulberry production using two/three way cross.
Results/Recommendations :Multiple hybrids of PM, HM and bivoltine races were prepared, two crops of pure races and their hybrids were reared.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Improving the sericultural productivity under rainfed/semi irrigated condition-Development of package of practices for mulberry-Screening of certain races of the germplasm of CSR&TI, Mysore. (RSRS, Kodathi)
Personnel :Saratchandra B, Ramesh SP, Narasimha Murthy N
Project Period :1986-1988
Objectives : To screen some races of the germplasm of CSR&TI, Mysore for their suitability.
Results/Recommendations :Ten trials were conducted in both multivoltine and bivoltine races to study their performance for multiplication. Two races of multivoltine (Nong 51 and Rong D) and 3 bivoltine races (C120, C130 and N4) were maintained. The Nong 51 and Rong D performed very well with higher survival rate of 91%. The race C130 recorded highest SCW (1.283) and race C120 recorded highest SR (22.2%).
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Behaviour of some silkworm races and their performance in Salem district in different seasons. (RSRS, Salem)
Personnel :Thangavelu K, Veeraiah TM, Nagaraja, Gangwar SK
Project Period :1986-1987
Objectives : To study the behaviour of some silkworm races and their performance in Salem district in different seasons.
Results/Recommendations :Bivoltine layings of different combinations were distributed in the field. NB4D2 has given better results (66 kg/100dls) compared to other races.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine Breeding-Studies on induced mutations in silkworm.
Personnel :Vijayaraghavan K, Nagaraju J, Premalatha V, Ravindra Singh, Chatterjee GK
Project Period :1986
Objectives : To induce mutations in silkworm.
Results/Recommendations :Three polyvoltine silkworm breeds viz., C.Nichi, Hosa Mysore and MY1 (Ci) were exposed to 2.5, 3.0 and 3.5 KR gamma rays. They were advanced to F5 generation.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine breeding-Studies on induced mutation in silkworm.
Personnel :Vijayaraghavan K, Rama Mohana Rao P, Premalatha V, Ravindra Singh, Gupta SK
Project Period :1986
Objectives : To induce mutations in multivoltine breeds.
Results/Recommendations :Three breeds viz., PM, HM and C.Nichi were exposed to different doses of gamma radiation. Gamma radiation caused 56-82% reduction in fecundity. HM was found to be highly sensitive.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multilocational trial of multivoltine breeds/hybrids-Multilocational trials of Mysore University breeds.
Personnel :Vijayaraghavan K, Kannantha V, Nagaraju J, Rama Mohana Rao P Premalatha V, Ravindra Singh, Gupta SK
Project Period :1986-1990
Objectives : Multilocational trials of silkworm breeds developed by Mysore University.
Results/Recommendations :Mysore University strains were reared 5 times and found better than Pure Mysore in cocoon yield, shell weight and SR%.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multilocational trial-Multilocational trial of multivoltine breeds/hybrids-Multilocational trial of MY1 hybrids.
Personnel :Vijayaraghavan K, Kannantha V, Nagaraju J, Rama Mohana Rao P Premalatha V, Ravindra Singh, Gupta SK
Project Period :1986-1990
Objectives : Multilocational trial of rearing performance of MY1 hybrids.
Results/Recommendations :MY1 hybrids were tested in Karnataka, Andhra Pradesh and Tamil Nadu. An average yield of 34.0 kg/100 dfls was recorded as against 31.6 kg in PM hybrids. The rate per kg was Rs.82.96 in MY1 hybrid and Rs.77.66 in PM hybrids.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of highly productive bivoltine breeds-Breeding oval type bivoltine breeds.
Personnel :Nagaraj CS, Misri SS, Ratna Sen
Project Period :1987-1989
Objectives :To evolve superior Chinese (oval) type bivoltine breeds.
Results/Recommendations :Two lines CC1 and CA2 have been evolved and found promising for hybrid testing at laboratory level. The committee for organizing multilocational trials proposed that CC1 and CA2 breeds should be propagated in large scale. Significant differences were noticed in respect of fecundity, cocoon weight, shell weight and shell ratio in CC1 and CA2 as compared to NB7.
Source of Information :Annual Report:1987-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Viability improvement through breeding plans.
Personnel :Nagaraj CS, Misri SS, Ratna Sen
Project Period :1987-1988
Objectives :To evolve viable (dumbell) Japanese type bivoltine races.
Results/Recommendations :Among the seven breeds, JSV7 showed higher viability (12.8 and 15.6%) when compared to NB18 and NB4D2 respectively. But the SR% was lower when compared to the popular breeds. Although the cocoon characters are on par with NB18 and NB4D2, the ERR% of JSV2 is higher than that of the controls.
Source of Information :Annual Report:1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Improvement of cocoon characters by using sex-limited males.
Personnel :Nagaraj CS, Misri SS, Ratna Sen
Project Period :1987-1989
Objectives : To improve the shell weight of promising breeds.
Results/Recommendations : The males of sex-limited breeds viz., TC1 and HN1 having high shell weight were crossed with females of CC1 and NB4D2 respectively to improve their shell weights. Initially the shell weight of CC1 and NB4D2 were improved but in later generation, it was inconsistent.
Source of Information :Annual Report:1987-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of hardy yellow bivoltine.
Personnel :Nagaraj CS, Misri SS, Ratna Sen
Project Period :1987-1989
Objectives : To evolve an improved variety over PCN in respect of cocoon yields and other traits indicating quality.
Results/Recommendations :Various lines viz., CAC, CPC and CPP1 were evolved. These two lines are not showing any significant improvement over NB7.
Source of Information :Annual Report:1987-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of sex-limited strains of bivoltine silkworms-Evolution of Sex-limited cocoon colour lines.
Personnel :Nagaraj CS, Misri SS, Ratna Sen
Project Period :1987-1989
Objectives :To develop races with sex-limited cocoon colour for easy sex identification in cocoon stage in grainage.
Results/Recommendations :Females of WYP (a sex limited strains) were crossed with CC1 and NB4D2 males. Sex limited yellow cocoon character was transferred to CC1 and NB4D2. Attempts are being made to improve robustness of sex-limited breeds.
Source of Information :Annual Report:1987-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of sex-limited strains of bivoltine silkworms.
Personnel :Nagaraj CS, Misri SS, Ratna Sen
Project Period :1987-1989
Objectives :To evolve lines with sex-limited larval markings for easy separation of sexes at larval stage.
Results/Recommendations :Overall performance of NC1, TC1 and HN1 are not better as compared to NB7 and NB18. Attempts are being made to improve robustness of sex-limited breeds.
Source of Information :Annual Report:1987-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance of breeders stock of popular bivoltine stocks KA, NB7, NB18 and NB4D2.
Project Period :1987-1990
Objectives : To rear and supply breeders stock of approved races.
Results/Recommendations : A total of 50 seed cocoon lots were processed to achieve the target. Four popular breeds namely KA, NB7, NB18 and NB4D2 which are in current use were maintained in the laboratory and supplied to the multiplication centres as and when required as fresh stock.
Source of Information :Annual Report:1987-90
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breed Testing-Multilocational trials of CC1 and its hybrids.
Project Period :1987-1990
Results/Recommendations :The multilocational trial of 17 breeds selected by the bivoltine cataloguing committee of CSB was taken up 18 different locations of Karnataka, AP, TN and West Bengal. Considering the effective rate of rearing in different locations, 2 ovals namely CC1 and NN6D and 3 dumbell breeds S2, JSV6 and P5 have been identified. The future plan of the laboratory is to conduct multilocational trial with identified hybrids in RSRS at different locations and also with adopted farmers.
Source of Information :Annual Report:1989-90
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Performance of Mysore university strains at CSR&TI, Mysore.
Personnel : Vijayaraghava K, Rama Mohana Rao P, Premalatha V, Ravindra Singh K Gupta SK
Project Period :1987-1989
Objectives :To assess the performance of the three new multivoltine strains of Mysore University at CSR&TI.
Results/Recommendations :Mysore University strains viz., MU1, MU11 and MU303 does not differ much in ERR, but better in cocoon yield (weight), cocoon and shell weight and shell ratio % compared to PM.
Source of Information :Annual Report:1988-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Genetic dissection of hardiness in bivoltine and multivoltine silkworm races-Hardiness Vs digestion.
Project Period :1987-1990
Objectives : To pave the way for genetic manipulation by conventional breeding and by genetic engineering.
Results/Recommendations :Haemolymph amylase activity was analyzed in one bivoltine and twelve bivoltine races. Among bivoltines, CC1 showed highest and NB7 had lowest activity, while PM had highest and Nistid had the lowest activity among multivoltines. Further, the digestive amylase activity was analyzed in 7 bivoltines and 11 multivoltine races, which was found to be higher in multivoltines than bivoltines. The amylase activity in the digestive juice for 170 breeds/races of multi and bivoltine was analyzed after 10th and 15th feedings in 5th instar. The results showed a significant positive correlation between amylase activity ad ERR on one hand had negative correlation with weight of larva, cocoon and shell on the other. The development profile in 3 hrs and 3 multivoltines was analyzed in different days from 3rd moult to spinning stage. PCN and NB18 have highest activity in the larvae out of 3rd moult. The amylase activity in the hybrids using Nistari as female and males of 8 multivoltine and 4 bivoltine showed higher heterosis for Nistari x Nistid cross even with low parent value.
Source of Information :Annual Report:1989-90, Directory of Concluded Projects, CSRTI, Mysore 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Scanning electron microscopic study of egg shell surface in silkworm Bombyx mori.
Project Period :1987-1989
Objectives :To compare the variation in the fine structure of egg shell surface in bivoltine and multivoltine races.
Results/Recommendations :During the period, the follicular imprint analysis for tasar eggs have been complemented and observations were compared with the earlier microscopic studies by Sen and Jolly et al. The general surface scanning for several multivoltines have been done.
Source of Information :Annual Report:1988-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance of approved bivoltine pure races.
Project Period :1987-1988
Objectives :To maintain stock races for utilization in different experiments while observing their performance.
Results/Recommendations :Four bivoltine races namely KA, NB7, NB18 and NB4D2 were reared 4 times during the year. It was observed that average yield for 100 dfls varied from 45-47 kg. The highest ERR was recorded in NB4D2 (67%) and yield 9.715 kg/10000 larvae followed by KA.
Source of Information :Annual Report:1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Testing of newly evolved silkworm hybrids.
Project Period :1987-1988
Objectives :To recommend suitable hybrids for commercial exploitation.
Results/Recommendations :PCN hybrids recorded higher ERR of 95.3% and its reciprocal showed 82.2% with yields of 12.6 and 11.2 kg/10,000 larvae respectively. But PM cross yielded much higher upto 14.5 kg followed by MY1 14.3 kg/10000 larvae. However, there was no significant variation in SR%.
Source of Information :Annual Report:1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Rearing of NB18 under PCN programme.
Project Period :1987-1988
Objectives :To supply seed cocoons to CSR&TI, Mysore in production of PCN hybrid layings for field trials.
Results/Recommendations :Four rearings were conducted and 1.8 lakh cocoons were harvested against 563 dfls brushed and were supplied to CSRTI, Mysore for seed preparation.
Source of Information :Annual Report:1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Production of HM and PM and their hybrid.
Project Period :1987-1988
Objectives :To supply seed cocoons to CSR&TI, Mysore in preparation of multiple hybrids of PM, HM and their bivoltine hybrids.
Results/Recommendations :Two crops of pure race and two crops of hybrids were tested. A total of 225 dfls were reared and 1.08 lakh seed cocoons were produced and supplied to CSRTI, Mysore.
Source of Information :Annual Report:1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance and testing of hardy silkworm race suitable for rainfed conditions.
Project Period :1987-1989
Objectives :To find out the suitable hardy race for rainfed conditions.
Results/Recommendations :During the year, three trials were conducted with PCN hybrids in different seasons which showed an average yield of 33.648kg/100 dfls with ERR of 8209.
Source of Information :Annual Report:1987-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Testing of PCN silkworm races as an hardy race to suit the rainfed condition.
Project Period :1987-1988
Objectives :To popularize the rearing of PCN hybrids in rainfed areas.
Results/Recommendations :During the year 3 laboratory trials conducted in different seasons showed an yield of 28.669 kg/100 dfls and ERR 70.2%.
Source of Information :Annual Report:1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evaluation of hardy silkworm race for crop suitability and higher yield.
Project Period :1987-1988
Objectives: To evolve hardy silkworm races for crop suitability and higher yield.
Results/Recommendations :A comparison of the data with initial lab trial on different parameters indicate that HM x PCN race appears "better" suited for this area which recorded an average yield of 63.40 kg/100 dfls with dfls of 85.14% and SR% of 14.97.
Source of Information :Annual Report:1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance of silkworm germplasm.
Personnel :Puttaswamy Gowda, Ramesh Babu M, Singh K
Project Period :1987-1988
Objectives :To maintain silkworm germplasm of 29 different breeds and monitoring of their programme.
Results/Recommendations :29 different breeds are maintained in germplasm bank. Maximum ERR was recorded in J122 and SPJ2 races (96.67%) and a minimum in Cevensi yellow (82.0). Highest and lowest silk ratios were recorded in SPJ2 (23.7%) and J122 and J112 (16.0%) respectively.
Source of Information :Annual Report:1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Relative performance of pure race and cross breeds in tropical conditions in Tamil Nadu.
Personnel :Thangavelu K, Veeraiah TM, Nagaraj, Rajkumar
Project Period :1987-1988
Objectives :To study the performance of pure race and cross breed in Tamil Nadu.
Results/Recommendations :Cross breeds' yield ranged from 17.60 to 55.70 kg (mean 47.07 kg)/100 dfls, bivoltines yield ranged from 4.80 to 45.90 kg/100dfls and multivoltine pure race's yield ranged from 8.00 to 39.20 kg/100 dfls. Range for single cocoon weight for cross breed varied from 1.24 to 1.50g for bivoltine it varied from 1.47 to 1.73g and for multivoltine pure races, it varied from 0.91 to 1.02g. The study indicates that cross breeds recorded better range for cocoon yield.
Source of Information :Annual Report:1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Preparation of hybrids under multilocational trial programme.
Project Period :1987-1988
Objectives :To prepare and supply dfls for MLT.
Results/Recommendations :For the field evaluation of new multivoltine strains, MY1 and the hardy bivoltine strains PCN, hybrid layings were produced in all the seasons and supply effected to different stations. The entire production was made in loose form.
Source of Information :Annual Report:1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Production of miscellaneous hybrids.
Project Period :1987-1988
Objectives :To produce different hybrids for evaluation.
Results/Recommendations :Miscellaneous hybrids involving various parents were prepared and supplied for initial evaluation. A total quantity of 3017 dfls were produced involving 13 combinations.
Source of Information :Annual Report:1987-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multivoltine Breeding-Improvement and isolation of multivoltine strains with better quantitative and qualitative characters-Identification of silkworm breeds for relative susceptibility to diseases.
Personnel :Vijayaraghavan K, Rama Mohana Rao P, Premalatha V, Ravindra Singh, Gupta SK
Project Period :1987
Objectives : To evolve disease tolerant multivoltine breeds.
Results/Recommendations :Eight multivoltine races were screened for pebrine disease. Infection rate ranged from 3.2 to 6.7% at larval stage and 75 to 100% at moth stage.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multilocational trial-Multilocational trial of multivoltine breeds/hybrids-Multilocational trial of selected multivoltine breeds.
Personnel :Vijayaraghavan K, Kannantha V, Nagaraju J, Rama Mohana Rao P Premalatha V, Ravindra Singh, Gupta SK
Project Period :1987-1989
Objectives : Multilocational trial of selected multivoltine breeds.
Results/Recommendations :Seven multivoltine breeds viz., GNP, KW1, KW2, AP2, P2D1, PA11, RD1 and PM were tested in Karnataka, Andhra Pradesh, Tamil Nadu, West Bengal and Jammu and Kashmir.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Multilocational trials of promising bivoltine breeds-Multilocational trials of promising breeds.
Project Period :1988-1990
Objectives :To evaluate the performance of promising bivoltine breeds.
Results/Recommendations :Two oval breeds namely CC1 and NN6D and 3 dumbell breeds: S2, JSV6 and P5 have been identified. The future plan of the laboratory is to conduct multilocational trial with identified hybrids in RSRS at different locations and also with adopted farmers.
Source of Information :Annual Report:1988-90
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Multilocational trial of bivoltine breeds suited to rainfed area (PCN and its hybrids).
Project Period :1988-1989
Objectives :To test the performance of PCN hybrid in rainfed areas.
Results/Recommendations :Testing of PCN pure and its hybrids has been continued at different centres. The farmers who reared PCN hybrids got Rs.19/- more per kg of cocoons (Rs.280 more returns/100 dfls reared).
Source of Information :Annual Report:1988-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of productive breeds-Evolution of productive oval type bivoltine breeds.
Project Period :1988-1989
Objectives :To evolve productive oval type bivoltine breeds.
Results/Recommendations : Significant differences were noticed in respect of fecundity, cocoon weight, shell weight and shell ratio in CC1 and CA2 as compared to NB7. Further breeding programme of CC1 and CA2 has been discontinued and will be maintained as stock races.
Source of Information :Annual Report:1988-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of superior multivoltine breeds-Evolution of superior multivoltine breeds.
Personnel :Vijayaraghavan K, Kannantha V, Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh, Gupta SK
Project Period :1988-1992
Objectives :To evolve multivoltine breeds with high viability and good cocoon characters.
Results/Recommendations : Anova indicated significant differences between the breeding lines and all showed better performance than Pure Mysore with respect to all the economic characters studied. Improvement noticed in the breeding line ranged from 62-98% in cocoon shell weight (0.17-0.21g) and 12 to 44% in cocoon shell ratio (15.0-19.28%) over control (0.107g and 13.38%). Survival rate (85-94%) and cocoon weight (1.075-1.291g) of the breeding lines were significantly higher than that of the control, Pure Mysore (77% and 0.802 g).
Source of Information :Annual Report:1988-92
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title : Combining ability studies-Identification of heterotic hybrids.
Personnel :Vijayaraghavan K, Kannantha V, Nagaraju J, Rama Mohana Rao P, Premalatha V, Ravindra Singh, Gupta SK
Project Period :1988-1989
Objectives :To identify promising multi x bi heterotic hybrids for commercial exploitation.
Results/Recommendations : RD1 and three Mysore University’s strains MU1, MU1 and MU303 were utilized. The results indicated no significant difference between PM and RD1 hybrids with regards to ERR and other cocoon characters. RD1 hybrids have shown 4 days shorter larval duration.
Source of Information :Annual Report:1988-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Improvement of viability in white multivoltine breeds-Viability improvement in white multivoltine breeds.
Personnel :Vijayaraghavan K, Kannantha V, Nagaraju J, Rama Mohaa Rao P, Premalatha V, Ravindra Singh, Gupta SK
Project Period :1988-1989
Objectives : To improve viability of white multivoltine breeds of high shell and cocoons weight but low viability.
Results/Recommendations :MW2 and MW3 which are low in viability have been selected. Cocoons with average and nearest to average weight were selected for further multiplications as suggested by Ujigawa. Three trials were conducted and mean data is as follows.
Fecundity
ERR
SC wt. (g)
SS wt. (g)
SR%
No.
Wt. (kg)
MW2
481
8941
11.27
1.260
0.196
15.5
Control
526
8485
11.32
1.334
0.202
15.1
MW3
527
9012
12.591
1.397
0.222
15.9
Control
542
8616
12.541
1.455
0.238
16.3
Source of Information :Annual Report:1988-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Germplasm maintenance of silkworm races.
Project Period :1988-1988
Objectives :To maintain and study the rearing performance for multiplication.
Results/Recommendations :So far 3-4 trials have been conducted with two multivoltine (Nong 51 and Rong D) and four bivoltines (N4, M10, C120 and C132). All races were fared well except N4 which showed high mortality in 5th age and pupal stage. In multivoltine races Rong D performed well than Nong51.
Source of Information :Annual Report:1988-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Conducting multilocational trials (MLT) of multi and Bivoltine silkworms.
Project Period :1988-1989
Objectives :To study the rearing performance under regional conditions.
Results/Recommendations :Three trials have been conducted with nine races of multivoltine namely, KJ, RD, GNP, AP2, PA11, P2D1, PM, KW1 and KW2 and twelve races of bivoltine namely NB7, NB18, NB4D2, KA, JSV6, NN6D, S2, SH6, NB1, CC1, 36PC and CP1B. Among multivoltines RD1 gave better ERR. In bivoltine SH6, CP1B and S2 showed more mortality than other races.
Source of Information :Annual Report:1988-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance of silkworm germplasm.
Project Period :1988-1989
Objectives :To maintain different silkworm races and to meet the requirement of parental races for various breeding programme.
Results/Recommendations :
· The silkworm germplasm was enriched with 78 races during 1988-89. Analysis of various racial characters were carried out as per the Research Extension Centre commendations of the race cataloguing committee. Among the old 29 races under germplasm J1 (m) and J191 (M) races showed a maximum ERR of 94.6% and 78.6% respectively.
· SPC1 recorded a maximum silk ratio of 16.7%. Of 36 races reared for first generation, highest ERR of 96.1% and lowest ERR of 65.0% were noticed in PBL1 and SH2 races respectively. SSOP and 4792 races showed maximum (23.6%) and minimum (11.7%) silk ratios respectively.
· In addition, 12 more races were added to the germplasm of late, Barapat (Boropolu) race was also included, in the germplasm and its racial characters are being assessed.
Source of Information :Annual Report:1988-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on the management and crop results of multivoltine and bivoltine breeds under eco-climatic condition prevailing in Southern States.
Project Period :1988-1990
Objectives :To impart training on sericulture to international trainees.
Results/Recommendations :The orientation programme in sericulture was conducted for planners/executives, technocrats of eight countries (Kenya, Thailand, Malaysia, Bangladesh, Vietnam, Philippines, Indonesia and Zambia). The participants were invited under ICTRETS programme and various aspects of sericulture were dealt for a period of 10 days.
Source of Information :Annual Report:1988-90
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Improving the sericultural productivity under rainfed/semi irrigated condition-Development of package of practices for mulberry-Testing of new multivoltine and bivoltine races under MLT programme. (RSRS, Kodathi)
Personnel : Ramesh SP, Narasimha Murthy N
Project Period :1988-1990
Objectives : To test new multivoltine and bivoltine races under MLT programme.
Results/Recommendations :Eight multivoltine races and 14 bivoltine races were screened during the period.
Data recorded highest survival rate of 89% in RD1 race. However, highest CW and SR% was recorded in KW2 among multivoltine. NB7 and CC1 were found superior compared to others.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Improving the sericultural productivity under rainfed/semi irrigated condition-Development of package of practices for mulberry-Testing of newly evolved silkworm hybrids of CSR&TI, Mysore. (RSRS, Kodathi)
Personnel :Ramesh SP, Narasimha Murthy N
Project Period :1988-1990
Objectives : To test newly evolved silkworm hybrids of CSR&TI, Mysore.
Results/Recommendations :9 hybrid combinations were evaluated during the period. PCN hybrids registered higher survival than PM hybrids.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multilocational trial of multivoltine silkworm races. (RSRS, Salem)
Personnel :Sikdar AK, Nagaraja, Somasundaram P, Rajkumar
Project Period :1988-1989
Objectives : To evaluate multivoltine silkworm races under Multilocational trial.
Results/Recommendations :Out of 8 races tested viz., PM, RD1, P2D1, AP2, PA11, KW1, KW2, GNP all the races had 5 days lesser larval duration than Pure Mysore. The ERR, SCW, SSW, SR% were better in these races than PM. RD1 was having hibernating character.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Preparation of hybrids under multilocational trial programme.
Project Period :1988-1989
Objectives :To prepare dfls for MLT programme.
Results/Recommendations :For the purpose of field evaluation of new multivoltine, MY1 and the hardy bivoltine PCN, hybrid layings were produced so as to cover all the seasons and supply effected to different stations of CSRTI. The entire production and supply was made as loose grains.
· PCN x NB18 : 54,545
· NB18 x PCN : 11,866
· NB4D2 x PCN : 5,763
· MY1 x PCN : 55,035
Source of Information :Annual Report:1988-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title : Production of experimental hybrids.
Project Period :1988-1989
Objectives :Grainage activities for production of experimental hybrids.
Results/Recommendations :Experimental hybrids, as required by various laboratories of CSRTI comprising of 44 combinations were prepared to the tune of 9103 dfls.
Source of Information :Annual Report:1988-89
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Genetic dissection of hardiness in multi and bivoltine silkworm races-Screening of breeds for esterase isozyme variability of free amino acids in blood.
Personnel :Chatterjee SN, Nagaraju J, Nirmal Kumar S, Patnaik AK, Rao CGP, Chatterjee GK, Abraham EG, Tewary SK, Parthasarathy G, Somashekara D, Maheswari B
Project Period :1988-1990
Objectives :To analyse the esterase enzyme of silkworm hybrids through PAGE.
Results/Recommendations :Anodic esterase isozyme were analysed by gel electrophoresis in 58 multivoltine, 31 bivoltines and 24 hybrids. Twelve bands were identified, of which band 8 and 9 were most active. Here denaturation studies showed that heat shock completely obliterates the activity of band 9 and makes the band more active.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Genetic dissection of hardiness in multi and bivoltine silkworm races-Studies on genetic variability of free aminoacids in blood.
Personnel :Chatterjee SN, Nagaraju J, Nirmal Kumar S, Patnaik AK, Rao CGP, Chatterjee GK, Abraham EG, Tewari SK, Parthasarathy G, Somashekara D, Maheswari B
Project Period :1988-1990
Objectives :Analysis of free amino acids in new silkworm breeds.
Results/Recommendations :Free aminoacids in the blood pool of 14 silkworm races was analyzed. Some races had both Theonine and Serine, while others had only one of the two. The quantitative estimation of 19 amino acids in different developmental stages from 3rd moult to pre-pupa in 4 breeds showed that 4 amino acids viz., Aspartic acid, Theonine, Serine and Ornithine have the lowest concentration during spinning and pre-pupal stages. Effect of temperature revealed changes in glycine, alanine, valine and isoleucine-leucine block, which must be playing some role in bioconversion process initiated due to heat shock.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Silkworm crop improvement-Improvement in productivity of cross breeds-Improvement of non-hibernating female parent in the cross breed strains.
Personnel :Vijayaraghavan K, Kannantha V, Rama Mohana Rao P, Premalatha V, Ravindra Singh, Gupta SK, Sabita N
Project Period :1989-1990
Objectives :
Results/Recommendations :Two new breeding programs were initiated involving PM, GNP, Nistari, P4D1, PA11, RD1 and MHMP(W) and 7 lines were identified. HP3 hybrids were found better with 97% survival and 18 kg cocoon yield for 10,000 larvae compared to other crosses.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Silkworm crop improvement-Improvement in productivity of cross breeds-Evaluation of the hybrids in the laboratory.
Personnel :Vijayaraghavan K, Kannantha V, Rama Mohana Rao P, Premalatha V, Ravindra Singh, Gupta SK, Sabita N
Project Period :1989-1990
Objectives :
Results/Recommendations :Line x Tester analysis was conducted with 9 non-hibernating breeds using NB7 and NB18 as testers.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Silkworm crop improvement-Improvement in productivity of cross breeds-Testing of cross breeds at farmers level.
Personnel :Vijayaraghavan K, Kannantha V, Rama Mohana Rao P, Premalatha V, Ravindra Singh, Gupta SK, Sabita N
Project Period :1989-1994
Objectives :Field performance of new multi x bi hybrids.
Results/Recommendations :MY1 x NB18 and PCN x BV were tested in the field. An improvement in yield by 3 kg for 100 dfls and a higher return of Rs.5 per kg was found in MY1 x BV, compared to PM x BV. PCN x BV showed 11.25% improvement in cocoon yield/100 dfls, 50.1% in rate/Kg over the cross PM x C.Nichi.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding for improvement of productivity of Indian silkworm breeds-Breeding for survival improvement in bivoltine hybrids (Approach-I).
Personnel :Mallikarjuna, Kalpana GV, Chatterjee SN, Datta RK, Sudhakar Rao P, Jayaswal KP
Project Period :1990-1993
Objectives : To improve upon the survival and adoptability of bivoltine hybrids.
Results/Recommendations : Based on the line x tester results six promising sublines viz., 915A, 9147A3 (ovals), 912B3, 916A1, [916A and (16B (dumbell)] were identified which were characterized by survival >85% and shell ratio >19%.
Source of Information :Annual Report:1992-93
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding programme for improvement of shell ratio.
Project Period :1990-1993
Objectives : Evolution of highly productive bivoltine races/hybrids and their adoption for commercial rearing in potential zones.
Results/Recommendations : Out of twenty nine hybrids tested, ten hybrids have recorded above 23.0% cocoon shell ratio. The hybrid, A21A x NB4D2 has registered 97.0% survival, 2.1g cocoon weight, 49.7 cg cocoon shell weight, 23.3% cocoon shell ratio, 1238 in filament length, 19.4% raw silk and 87 p+ neatness. Similarly, the hybrid B21B x A20A has shown 24.5% cocoon shell ratio, 19.85% raw silk, 134m filament length and 86 p+ neatness. It is planned to test these hybrids in RSRS and REC units and also in large scale during favourable season at farmers level. Popularization of these hybrids in the field will enable to reduce the renditta in reeling units.
Source of Information :Annual Report:1992-93
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Testing of new bivoltine hybrids in laboratory.
Personnel :Nagaraj CS, Nirmal Kumar S, Sudha VN
Project Period :1990-1992
Objectives : To identify the hybrids for different seasons.
Results/Recommendations : Evaluation was done on the basis of average index for the traits, survival, cocoon weight, shell weight, shell ratio and hatchability (average index for all the traits-average index of all the hybrids, divided by SD x 10+50). As could be seen from the hybrid H2 and H3 have registered the highest index as compared to other hybrid. Similarly, in rainy season, H4 and H3 and H6 (KA x NB4D2) have shown highest evaluation value. Whereas, H5 (NB7 x NB18) hybrid has recorded low performance in all the seasons (below 50).
Source of Information :Annual Report:1991-92
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Identification of parents to raise base population for the breeding plans.
Personnel :Jayaswal KP, Rama Mohana Rao P
Project Period :1990-1991
Objectives :To estimate GCA and SCA and also to identify parents for adopting definite breeding plans.
Results/Recommendations :Based on the GCA effects for ERR, Fr (p), C.Nichi G and A14dy were selected to raise the base population for the breeding plan to improve ERR (>90%). Similarly, Hua-204, GNP and G were identified on the basis of GCA effects for the desired traits in order to raise the base population for the breeding plan to improve shell weight (20-25 cg) and shell ratio (17-18%). Anova indicated significant differences between the breeding lines and all showed better performance than Pure Mysore with respect to all the economic characters studied.
Source of Information :Annual Report:1990-91
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Genetical studies towards strengthening of silkworm breeding-Developmental profiles of amylase activity in certain strains of mulberry silkworm (Bombyx mori L).
Personnel :Chatterjee SN, Patnaik AK, Chatterjee GK
Project Period :1990-1993
Objectives :Detailed study on the activity profile of amylase enzyme in blood and digestive juice of six Indian races of mulberry silkworm (Bombyx mori L.)
Results/Recommendations :Both additive and dominant gene action was noticed for amylase and larval weight, while predominantly additive effect was seen for cocoon and shell weight. While predominantly duplicate type of epistasis was observed for amylase and larval weight complementary interaction was not seen for any character.
Source of Information :Annual Report:1992-93
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Genetic variability of amylase enzyme activity in mulberry silkworm (Bombyx mori L) and its significance.
Personnel :Chatterjee SN, Ashwath SK, Rao CGP
Project Period :1990-1994
Objectives :To study the variability of amylase enzyme in Indian races and breeds of mulberry silkworm Bombyx mori and its role on the manifestation of yield components.
Results/Recommendations :The genetic divergence observed in terms of digestive amylase isozymes and its association with yield traits offers scope of its use as a marker for mapping of quantitative trait loci and in breeding. Digestive juice samples were drawn from the individual larvae of both F1 and F2 progeny of all the three crosses and analyzed for amylase isozyme pattern by cathodic PAGE.
Source of Information :Annual Report:1993-94
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Multivariate analysis of yield and biochemical parameters.
Personnel :Chatterjee SN, Patnaik AK, Ashwath SK
Project Period :1990-1994
Objectives : To investigate the relationship between carbohydrate and protein metabolism and to identify whether any other enzyme like digestive amylase is having a direct bearing on various yield components.
Results/Recommendations :Results showed that among the four parameters, only the relationship of amylase is conspicuous as it is correlated with all the traits except ERR by weight and the association was positive with ERR by number and negative with the others. The activity of other enzymes did not show significant correlations with most of the yield parameters except alkaline phosphate with ERR by number, invertase with SR% and protease with cocoon and shell weight.
Source of Information :Annual Report:1993-94
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Use of biochemical markers along with yield parameters for grouping of different strains.
Personnel :Chatterjee SN, Patnaik AK, Ashwath SK
Project Period :1990-1994
Objectives :To use biochemical parameters for grouping of different strains.
Results/Recommendations :Using the activity of amylase as a surrogate marker for improving survival, 5 medium yielding hibernating breeds were reared for two generations. The performance of the pure races and also hybrids clearly indicates not only the better adoption of the breeds under field conditions but also substantiates the utility of biochemical parameters as surrogate markers for improving the yield.
Source of Information :Annual Report:1993-94
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on molecular basis for immunity in silkworm Bombyx mori.
Personnel :Nagaraju J, Abraham EG, Sethuram BN
Project Period :1990-1992
Objectives :To study the molecular basis for immunity in silkworm Bombyx mori.
Results/Recommendations : Bacterial infections are known to trigger the synthesis of immune proteins in various insects. Injection of live bacteria into the silkworm induced anti-bacterial activity in the haemolymph which was detected by petridish zonal inhibition assay and bacterolytic assay.
· The induced antibacterial protein was purified from the infected haemolymph of Bombyx mori through column chromatography. The purified protein was checked for its antibacterial activity of gel over lay and petridish zonal inhibition assay techniques. The antibacterial protein of Bombyx showed at least sixteen times higher bactericidal activity than that of Antheraea mylitta.
· The results indicated that BmNPV treated with RFP had no infectivity while in control NPV treated with either BSA or Buffer revealed 100% infectivity.
· Recently RFP having 28 kDa mol.wt. has also been isolated. It showed a high protease activity which is different from the earlier reported PLC enzyme like activity.
Source of Information :Annual Report:1991-92
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Digestive juice and haemolymph amylase isozyme pattern variability of silkworm strains.
Personnel : Patnaik AK, Chatterjee SN, Rao CGP
Project Period :1990-1992
Objectives :To analyse the digestive enzymes’ isozyme pattern for grouping of silkworm strains.
Results/Recommendations :Isozyme markers have been used for mapping quantitative trait loci in various crop plants which could further help in directional breeding.The haemolymph amylase isozyme pattern was totally different from the digestive amylase but was same in all the hibernating and non-hibernating races. Three anodic isozyme bands were present in all the races. Wide genetic variability in the digestive juice amylase activity in contrast to the haemolymph amylase activity. The amylase isozyme pattern of digestive juice and haemolymph in different strains also yield a similar picture.
Source of Information :Annual Report:1991-92
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Improvement of productivity in silkworm breeds for dry zone farming and others-Studies on genetic variability.
Personnel : Jayaswal KP, Rama Mohana Rao P, Ravindra Singh, Chatterjee SN
Project Period :1990-1994
Objectives :To evolve breeds with better survival (90%) which are required to scale up productivity in dry zone farming.
Results/Recommendations :51 silkworm breeds were subjected to ‘Cluster analysis’. 7 clusters were identified. Majority of the evolved breeds like Nong 51, Nong 42, Dao 9, Rangadazao were clustered with Diazo. PM appeared as isolated cluster.
Source of Information :Annual Report:1993-94, Directory of Concluded Projects, CSRTI, Mysore 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Shuttle breeding for hotter zones. (RSRS, Salem)
Personnel :Nagaraja, Somasundaram P, Sikdar AK
Project Period :1990-1993
Objectives : To evaluate silk worm races under Shuttle breeding programme for hotter zones.
Results/Recommendations :Evaluation of 290 and 490 multivoltine lines were done for 14 generations with PM as control. Results indicated 290 and 490 had better economic value than PM in survival (ERR, SCW and SSW) as evidenced by index value >5.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity of Indian silkworm breeds-Breeding for improvement of productivity of bivoltine breeds-Breeding for the improvement of survival in bivoltine breeds/hybrids (Approach II).
Personnel :Naseema Begum A, Mal Reddy N, Suresh Kumar N, Chatterjee SN, Raghavendra Rao D, Rosemond
Project Period :1990-1995
Objectives :To evolve breeds and to identify hybrid combinations with survival comparable to multi x bi hybrids with superior quantitative characters.
Results/Recommendations :At F12 generation, the evolved lines were evaluated utilizing KA and NB4D2 as testers. Based on Line x Tester analysis 5 lines namely 933A, 934A2, 934B, 934D and 935E with survival above 80% with moderate productivity traits were identified. Based on general combining ability results, the following lines were identified, 934D1, 934B, 934A2 for yield by number, 934D1, 935E and 933A for yield by weight, 935E for single cocoon weight, 934B, 935E and 933A for single shell weight and 934B, 934A2 and 933A for shell ratio.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Genetical studies towards strengthening silkworm breeding- Contributory/interactive co-relationship between yield parameters and biochemical traits.
Personnel :Chatterjee SN, Chinya PK, Nagaraju J, Patnaik AK, Ashwath SK, Rao CGP, Chatterjee GK, Abraham EG, Morrison MN, Nagaraju GM, Sethuraman N, Ramesh Kumar S
Project Period :1990-1994
Objectives :To analyse the digestive amylase activity in popular silkworm breeds of germplasm.
Results/Recommendations :Developmental pattern of amylase activity on low and high yielding groups of races showed no variability in blood but inter and intra-group variability in the digestive juice. Digestive amylase activity was highest in Indian traditional multivoltine followed by Indian evolved and Chinese evolved breeds with low yield, high yielding bivoltine of India and lowest in similar stocks from Europe and Japan. Digestive amylase activity was significantly (p>0.001) positively correlated with ERR percentage, while negatively correlated with weight of larva, cocoon and cocoon shell. For realization of survival, out of 6 biochemical parameters (amylase, invertase, alkaline phosphatase, protease at pH 7 and pH 10, blood trehalase level) the contribution of amylase alone was significant. While alkaline phosphatase and invertase affected the relationship of amylase with larval, cocoon and shell weight. The dominance of high over low amylase activity was indicated by the analysis of parents F1, F2 and BC progeny. However, a significant non-allelic interaction for amylase as in case of larval cocoon and shell weight was revealed by scaling test and components of generation means. A test breeding plan was adopted using amylase as one of the breeding parameter. Some of the promising lines were tested in field stations for identifying breeds for front line demonstration. Only anodic isozymes were found for haemolymph amylase but digestive juice has both cathodic and anodic amylase isozymes. While most high amylase activity stocks had either 4 or 5 cathodic bands all high yielding stocks were of cathodic ‘null’ type. Out of the 12 haemolymph esterase fractions shown by the anodic PAGE in 75 stocks, A1 band was detected only in one race, A3 in two races and A2 showed association with diapause, which could be used as markers. Haemolymph esterase band B1 was heat labile and B2 hyperactive after heat tolerant, which may be important for realization of hybrid vigour in terms of thermo-tolerance. Induction of heat shock proteins of 70, 56, 45 and 29 kDa were revealed in response to 41, 43, 45 and 46 C in NB18, but were not observed despite similar treatment in C.Nichi. However, an extra band of 36 kDa was observed. Clustering by UPGMA using Eucledian distance of 54 stocks resulted in 7 clusters whereas addition of biochemical parameters led to the realization of two broad groups with significant differences in yield potentials, thus highlighting the contribution of biochemical parameters. Result of partitioning the stocks by K-means method into 5 groups further corroborates the association between yield and biochemical traits especially amylase activity.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Silkworm crop improvement-Improvement of productivity in silkworm breeds for dry zone farming and others-Identification of parents to rear base population for the breeding plans.
Personnel :Jayaswal KP, Rama Mohana Rao P, Ravindra Singh, Chatterjee SN
Project Period :1990-1994
Objectives :To raise base population in silkworm breeds to improve ERR.
Results/Recommendations :Nine breeds identified on the basis of genetic divergence analysis. Fr(P) showed positive GCA effect for fecundity, cocoon yield both by number and weight, cocoon weight and shell weight. (Dong 34 x Moria) showed positive SCA effect for fecundity yield, by weight and cocoon weight. Based on the GCA effects for ERR, Fr(P), C.Nichi, G and A14DY were selected to raise base population for the breeding plan to improve ERR.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Silkworm crop improvement-Improvement of productivity in silkworm breeds for dry zone farming and others-Evolution of hybrid component with improvement of ERR.
Personnel :Jayaswal KP, Radhakrishna PG, Chatterjee SN
Project Period : 1990-1994
Objectives :Improvement of silkworm’s productivity for dry zone farming.
Results/Recommendations :Nine breeding resource materials were studied to diallel analysis based on evaluation of GCA and SCA. 6 F1 hybrids were selected for breeding programme to evolve breeds with better survival. 83A performed best in respect of survival (97.3%) and total cocoon yield (12.5 kg). 82D showed highest cocoon weight (1.355g) and shell weight (0.225 g).
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Silkworm crop improvement-Improvement of productivity in silkworm breeds for dry zone farming and others-Evolution of hybrid component with improvement in cocoon shell weight and cocoon shell ratio.
Personnel :Rama Mohana Rao P, Ramakrishna S, Chatterjee SN
Project Period :1990-1994
Objectives :To improve cocoon and shell weight in new silkworm breeds.
Results/Recommendations :Parents were selected on the basis of diallel matings. Hu204, G, GNP, C.Nichi and A14DY were selected as base breeding material. Significant differences between the breeding lines were observed and the lines showed better performance than Pure Mysore. The lines showed improvement of 62.98% in shell weight, 44.4% in shell ratio over the control.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Improvement of productivity in silkworm breeds for dry zone farming and others-Breeding low yielding silkworm breeds with good fibre characters (neatness and raw silk %).
Personnel : Rama Mohana Rao P, Jayaswal KP, Chatterjee SN
Project Period :1991-1994
Objectives :Fifty one low yielding breeds were analyzed for their fibre characters. Based on the data, 6 parents were selected to evolve breeds with better neatness (85%). In order to improve fibre quality of hybrid combinations.
Results/Recommendations :Results indicate the superiority of the new lines over control breeds PM and C-Nichi, FC5B fared better for survival rate (91%) and yield by weight (12.4kg) while FC1 for cocoon shell weight (0.222g) and cocoon shell ratio (18.23%).
Source of Information :Annual Report:1991-94
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Field testing of the new hybrid combinations.
Personnel : Jayaswal KP, Rama Mohana Rao P, Mondal KC, Premalatha V
Project Period :1991-1992
Objectives :To study the new hybrids for field performance.
Results/Recommendations : Under this component, the new hybrid combinations are being tested at farmers level through RSRS. 4,327 dfls of RD1 x NB18 have been distributed to the farmers of the rainfed zone in Chamarajanagar from July 91 to April 1992.Data collected from farmers in 21 villages for 5000 dfls of each hybrid indicate significant difference in the yield/100 dfls and average return/100 dfls. There is an improvement of 80% in yield (26.2 kg) and 160% in average return/100 dfls (Rs.3581.00/) in RD1xNB18 as compared to PM x C-Nichi (14.4 kg and Rs.1369/).
Source of Information :Annual Report:1991-92
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Improvement of productivity in silkworm breeds for dry zone farming and others-Basic studies on the heritability of denier in silkworm Bombyx mori.
Personnel : Rama Mohana Rao P, Jayaswal KP
Project Period :1991-1992
Objectives :Calculating the heritability of denier of the filament in the silkworm to serve as reference in silkworm breeding programme.
Results/Recommendations :This experiment PMS2 (high denier) and C.Nichi (low denier) have been selected. Parents F1s, F2s and back cross populations have been reared together. Parent-offspring regression method has been used to compute heritability estimates. Heritability in narrow sense of denier was 54%.
Source of Information :Annual Report:1991-92
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Improvement of productivity in silkworm breeds for dry zone farming and others-Studies on the correlation of digestive enzymes (amylase and invertase) with food utilization on different breeds of the silkworm Bombyx mori.
Peronnel :Radhakrishna PG
Project Period :1991-1992
Objectives :To establish correlation between food utilization and digestive enzymes, viz., amylase and invertase.
Results/Recommendations :Among the high yielding breeds, NB4D2 and KA larvae consumed highest amount of 6600 mg of food, assimilated 45.7% and converted 23.3% of assimilated food to body weight, whereas the CC1 larvae consumed 32% less food (4500 mg), assimilated and converted 13.9% more food into body than NB4D2 and KA. Among low yielding breeds, PM and C-Nichi larvae consumed 3600 mg of food through their larval durations differ by 3 days. KW2 larvae consumed 4,500 mg of food; however, its assimilation and conversion of consumed food were found to be at par with other low yielding breeds and amounted to 55% and 27.5% respectively.
Source of Information :Annual Report:1991-92
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Genetical studies towards strengthening of silkworm Breeding-Genetic diversity of haemolymph esterases in silkworm.
Personnel : Chatterjee SN, Ashwath SK
Project Period :1991-1992
Objectives : To generate basic information on the variability of important enzymes in different strains/races of silkworm and its significance in relation to geographic distribution.
Results/Recommendations : Out of 75 strains 31 are multivoltine while the rest lay regularly diapause eggs. The electrophoretic analysis by anodic PAGE in the haemolymph of 5th instar (4th day) larvae has resolved 12 anodic fractions for esterase. B1 & B2 bands were the most prominent of all other bands due to their very dark staining appear to be the basic fractions, as they were detected in all the 75 breeds. The only other fraction which showed 100% presence is the band D3, which stains very lightly. The remaining bands vary in frequency from 24 to 88%. The hierarchial clustering after Ward’s method resulted in 5 clusters and possibility of classifying stocks on the basis of esterase polymorphism was tested.
Source of Information :Annual Report:1991-92
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Heat shock response in the silkworm.
Personnel : Nagaraja GM, Chatterjee SN
Project Period :1991-1992
Objectives : To find out if such heat stock proteins (HSP) are anyway associated with the differential thermo tolerance shown by the traditional non-hibernating and the high yielding hibernating stock.
Results/Recommendations :
· A temperature shock of 33, 36 and 39°C for two hrs did not induce synthesis of any novel proteins in either of the strains. However, in case of the hibernating strains NB18 extra protein band of 70 kDa, 56 kDa and 29 kDa were observed in response to the exposure to 41, 43, 45 and 47°C.
· The non-hibernating race C-Nichi did not produce these novel proteins despite of similar treatment, instead, a single extra band of 36kDa protein was observed. None of such HSPs were found in the fat body samples of the heat shocked animals.
· It is possible that the newly synthesized proteins were immediately transported to other tissues via haemolymph to counter the heat shock stress. Further, in NB18 the temperature range of 41-47°C dramatically accelerated the synthesis of non-heat shock proteins, also which might have played a role in thermal tolerance.
Source of Information :Annual Report:1991-92
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on DNA restriction fragment length polymorphism (RFLP) in silkworm Bombyx mori.
Personnel : Nagaraju J, Abraham EG, Datta RK
Project Period :1991-1995
Objectives :Discrete RFLPs have been observed in the genome of thirteen silkworm strains using five available probes.
Results/Recommendations :Hybridizing with genomic DNA by DIG labeling method, 37 numbers of low/single copy clones were identified on the basis of low intensity in hybridization signal, screening for more low copy clones is under progress. The low copy clones will be used to study the RFLP in 2 different silkworm races by Southern hybridization technique.
Source of Information :Annual Report:1994-95
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Improving the sericultural productivity under rainfed/semi irrigated condition-Development of package of practices for mulberry- Testing of newly evolved silkworm hybrids of CSR&TI, Mysore. (RSRS, Kodathi)
Personnel :Koundinya PR, Shantala R
Project Period :1991-1993
Objectives :To test newly evolved silkworm hybrids.
Results/Recommendations :3 hybrid combinations were evaluated during the period. NB7 x NB18 performed better.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Satellite breeding for selection of specific genetic material (silkworm) suitable for Tamil Nadu. (RSRS, Salem)
Personnel :Somasundaram P, Gururaj R, Sikdar AK
Project Period :1991-1992
Objectives : To evaluate silkworm races under Shuttle breeding programme for Tamil Nadu area.
Results/Recommendations :Multivoltine line 290 has shown higher ERR and yield over 490. The above two multivoltine lines were crossed with bivoltine component to exploit hybrid vigour. The combination 290 x KA and 490 x KA have shown better performance in survival than other combinations.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :RFLP mapping in Bombyx mori.
Personnel :Datta RK, Chatterjee SN, Nagaraju J, Chinya PK, Rao CGP
Project Period :1991-1994
Objectives :To study the RFLP mapping in silkworm Bombyx mori.
Results/Recommendations :From the genetically divergent silkworm strains available at CSR&TI, Mysore, 13 strains were selected on the basis of quantitative and qualitative characters. On the basis of isozyme pattern pure inbred lines has been raised by full sib mating in NB1, Nistari and PM races and raised F1, F2 and BC progenies for RFLP and RAPD studies. Partial genomic library of NB18 in plasmid (pUC18) vector was constructed and more than 200 recombinant clones were raised for using as probes, in addition to different probes collected from different sources to detect RFLPs. Using random primers, PCR based RAPD studies on 13 selected silkworm strains revealed significant polymorphic bands which differ among the strains, suggesting that random primers could be used to generate genetic markers.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Silkworm crop improvement-Improvement of productivity in silkworm breeds/hybrids for dry zone farming-Improving productivity of silkworm breeds, hybrids in semi arid conditions.
Personnel :Jayaswal KP, Shanthi R, Manjunth DS, Radhakrishna PG, Chatterjee SN
Project Period :1991-1994
Objectives :To improve new silkworm breeds for semi-arid conditions.
Results/Recommendations :New hybrids combinations were selected on the basis of MST analysis. The improvement in new breeds ranged from 26-39% in yield, 29-42% in cocoon weight, 60-89% in shell weight and 23-44% for shell ratio. The improvement in the new hybrids ranged from 17-49% in yield. 31-45% in cocoon weight, 41-68% shell weight, 2-16% in shell ratio and 30-72% in raw silk recovery over PM x C.Nichi.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Silkworm crop improvement-Improvement of productivity in silkworm breeds/hybrids for dry zone farming-Improving productivity for medium yield zone.
Personnel :Rama Mohana Rao P, Sudha VN, Chatterjee SN
Project Period :1991-1994
Objectives :To develop new silkworm breeds for medium yield zone.
Results/Recommendations :Improvement in the new lines over PM ranged from 7-27% in yield, 7-16% in cocoon weight, 6-37% in shell weight and 2-28% in shell ratio. Improvement in new combinations (hybrids) ranged from 7-9% in yield, 5-12% cocoon weight, 8-11% in shell weight, 3% in shell ratio and 10-21% in raw silk recovery percentage.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Silkworm crop improvement-Improvement of productivity in silkworm breeds/hybrids for dry zone farming-Improving productivity without additional input by way of improving fiber characters.
Personnel :Rama Mohana Rao P, Premalatha V, Jayaswal KP, Manjunatha DS, Chatterjee SN
Project Period :1991-1994
Objectives :Improvement of post-cocoon parameters in new silkworm breeds.
Results/Recommendations :Among the 5 lines, FC fared better for filament length (500 mts) and raw silk percentage (13%). Improvement in neatness for the new lines ranged from 12-22%. Improvement in fiber characters did not affect survival of yield
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Silkworm crop improvement-Improvement of productivity in silkworm breeds/hybrids for dry zone farming-Evolution of hybrid component with improvement in survival.
Personnel :Jayaswal KP, Premalatha V, Shanthi R
Project Period :1991-1994
Objectives :Development of silkworm breeds for better survivability.
Results/Recommendations :The improvement noticed in the new lines ranged from 10-29% cocoon yield, 28-44% in cocoon shell weight and 13-28% in shell ratio over the controls. The improvement in new hybrids ranged from 3-12% in yield, 10-28% in shell weight, 4-20% in shell ratio over PM x C.Nichi and PM x NB4D2.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Silkworm crop improvement-Improvement of productivity in silkworm breeds/hybrids for dry zone farming-Evolution of hybrid component with improvement in cocoon shell weight and cocoon shell ratio.
Personnel :Rama Mohana Rao P, Sudha VN, Chatterjee SN
Project Period :1991-1994
Objectives :To improve cocoon and shell weights in new breeds of silkworm.
Results/Recommendations :Six lines were selected on the basis of MST analysis. The improvement in new lines ranged from 12-49% in yield, 25-91% in shell weight and 10-48% in shell ratio over control. Improvement in new hybrids ranged from 4-10% in yield, 12-46% in shell weight and 6-21% in shell ratio over the control PM x NB18.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Silkworm crop improvement-Improvement of productivity in silkworm breeds/hybrids for dry zone farming-Improvement of fiber quality (neatness).
Personnel :Premalatha V, Rama Mohana Rao P, Rosemond, Jayaswal KP
Project Period :1991-1994
Objectives :To improve silkworm breeds for dry zone farming.
Results/Recommendations :The neatness in the new lines reached upto 85%. The results indicated the superiority of the new lines over PM and C.Nichi; FC5(b) fared better for survival (91%) and yield by weight (12.4 kg). While FC1 for cocoon shell weight (0.222 g) and SR 18.2%.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-Evolution of multivoltine for cross breed with higher productivity in rainfed zone.
Personnel :Ahsan MM, Jayaswal KP, Rama Mohana Rao P, Premalatha V, Sudha VN, Rosemond, Shanthi R
Project Period :1991-1994
Objectives :Development of new silkworm breeds for rainfed zone.
Results/Recommendations :The improvement in the new hybrids BL23 x NB4D2, BL25 x NBD2, BL26 x NB4D2 ranged from 45-54% in yield. 120-136% in shell weight and upto 41-52% in shell ratio, absolute silk content improved by 100-130% and renditta reduced by 38-43% compared to control PM x C.Nichi.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-Evolution of multivoltine for crossbreed with higher productivity and fiber quality in irrigated areas.
Personnel :Rama Mohana Rao P, Premalatha V, Sudha VN, Rosemond, Majumdar SK, Jayaswal KP, Ahsan MM, Shanthi R
Project Period :1991-1994
Objectives :To develop superior multivoltine breeds with better fibre qualities for irrigated conditions.
Results/Recommendations :Improvement in the new F1 hybrids BL24 x NB4D2, BL26 x NB4D2 and BL27 x NB4D2 ranged from 8-14% in cocoon yield, 7-27% in cocoon shell weight, 15% in SR%, 10% in neatness and 30% in filament length over PM x NB4D2.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-On farm/field trial of multi x bi hybrids.
Personnel : Rama Mohana Rao P, Raghavendra Rao D, Premalatha V, Ahsan MM
Project Period :1991-1998
Objectives :To evaluate the field performance of new silkworm hybrids.
Results/Recommendations :Two multi x bi hybrids BL23 x NB4D2 for rainfed and BL24 x NB4D2 for irrigated areas were authorized by CSB for commercial exploitation. 5000 dfls of new hybrids were supplied to DOS, Andhra Pradesh and an average yield of 45-56 kg/100 dfls against 35-45 kgs in PM x NB4D2 was recorded. A new set of 5 new multi x bi hybrids (BL62 x CSR5, BL64 x CSR2, BL65 x CSR5, BL67 x CSR5 and BL68 x CSR5) with shell ratio >20% have been identified in the laboratory.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-On farm /field trial of multi x bihybrids.
Personnel :Premalatha V, Raghavendra Rao D, Rama Mohana Rao P, Ahsan MM, Kariappa BK, Ravindra Singh
Project Period :1991-1998
Objectives :To study the field performance of new multi x bi hybrids.
Results/Recommendations :BL23 x NB4D2 and BL24 x NB4D2, which were authorized in 1997 for rainfed and irrigated areas respectively have recorded an average yield of 43.3 kg against 35-42 g/100 dfls in PM x NB4D2. BL24 x C.Nichi performed on par with PM x C.Nichi in survival but has given a renditta of 11.5 against 13 in PM x C.Nichi. 16443 dfls BL24 x NB4D2 was tested in 3 districts of Karnataka – Mandya, Mysore and Kolar. An average yield of 61.92 kg, 47.48 kg and 55.5 kg against 41.15 kg, 38.95 kg and 48.656 kg/100 dfls in PM x D2 in Mandya, Mysore and Kolar district respectively. BL43 x NB4D2 was tested under Race Authorisation Programme at all India levels.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding for high germ load tolerance.
Personnel : Ratna Sen, Maheswari M, Nataraju B
Project Period :1992-1997
Objectives : To identify specific family which can be utilized for actual breeding work for introgressing the high tolerance to NPV in the specific high yielding stocks.
Results/Recommendations : Two BmNPV tolerant stocks which showed 40-51% less mortality as compared to the control when challenged with a fixed concentration of BmNPV have been selected. The LC50 of the hybrids have been determined which reveal that about ten times more BmNPV concentration is required to kill 50% of the hybrids population when compared to control. The economic characters of the hybrid are almost on par with the control hybrid.
Source of Information :Annual Report:1996-97
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :High temperature studies.
Personnel : Suresh Kumar N, Basavaraja HK, Mal Reddy N
Project Period :1992-1994
Objectives :To study the thermotolerance in silkworm hybrids.
Results/Recommendations : Five Japanese hybrids (high temperature tolerance) along with 15 Indian hybrids were tested at 28, 32 and 35°C in the precision incubators imported from Japan. Among the two Indian hybrids, NB4D2 x CC1 has recorded 82.0% survival at 36°C. The cocoon characters have been considerably reduced as compared to room temperature rearing. The parental lines, hybrid evaluation will be conducted and promising combinations will be tested in high temperature areas.
Source of Information :Annual Report:1993-94
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding for improving productivity with medium input zones mostly rearing crossbreed layings.
Personnel : Chatterjee SN, Mallikarjuna B, Kalpana GV
Project Period :1992-1995
Objectives : To identify nearer and distant sub lines, so that convergence can be done accordingly.
Results/Recommendations :Line x Tester analysis involving 22 sub lines with moderate cocoon traits and their hybrids was carried out during the year. Based on the line x tester results, six promising sublines viz., 915A, 9147A3 (ovals) 912B2, 916A1, 916A and 916B (dumbells) were identified which were characterized by survival >85% and shell ratio >19%. The identified lines will be subjected to hybrids evaluation both at laboratory and farm level after diallel analysis.
A F12 generation, the evolved lines were evaluated utilizing KA & NB4D2 as testers. Line x Tester analysis indicated 5 lines namely 933A, 934A2, 934B, 934D and 935E to have survival about 80% and moderate cocoon characteristics. The lines found to be superior for different traits based on general combining ability effects are as follows.
· 934D1, 934B, 934A2 for survival by number.
· 934D1, 935E and 933A for yield by weight.
· 935E for single cocoon weight.
· 934B, 935E and 933A for single shell weight and 934B, 934A2 and 933A for shell ratio.
Source of Information :Annual Report:1994-95
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Analyzing breeding resource materials available at CSR&TI, Mysore.
Personnel : Chatterjee SN, Suresh Kumar N, Ratna Sen
Project Period :1992-1994
Objectives :To analyse the breeding resource materials thorugh biochemical markers.
Results/Recommendations : To test the validity and performance of 157 resource materials having regular diapause were subjected to agglomerative hierarchial clustering, considering also the amylase enzyme marker. The breeding lines, NK25 and NK31 have registered cocoon shell ratio of 22% and 21.6% respectively. All the lines have shown survival above 85% except NK23. These breeding lines will be subjected for hybrid testing during September '94. The selected hybrids will be tested at RSRS units of CSR&TI.
Source of Information :Annual Report:1993-94
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Genetical studies towards strengthening of silkworm breeding-Analysis of inheritance of digestive amylase vis-à-vis yield traits.
Personnel : Ashwath SK, Patnaik AK, Chatterjee SN
Project Period :1992-1996
Objectives :The important correlation of digestive amylase with survival and other characters has already been demonstrated and test breeding programme using amylase as a marker was also adopted.
Results/Recommendations :During the period, the breeding of the evolved line NNB was completed from BC5 to BC9. The mean estimates of the five crops data indicated an overall increase of 7% in survival in the evolved lines over its recurrent parent without any deterioration in the yield traits.
Source of Information :Annual Report:1995-96
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Genetic variability of G-6 PD activity and its relation with yield attributes in Bombyx mori L.
Personnel : Nagaraja GM, Chatterjee SN, Ashwath SK
Project Period :1992-1993
Objectives :To analyse the genetic variability of G-6 PD activity and its correlation with yield traits.
Results/Recommendations : G-6-PD bears important relevance to the energy metabolism and the need for its study was earlier stressed. Further, the use of G-6-PD as a marker was amply demonstrated for various genetical studies in higher organisms.The simple correlation analysis of G-6-PD with seven yield parameters revealed strong positive correlation of the enzyme activity with weight of mature larva, cocoon and cocoon shell, while r-values for total larval span, survival and yield weight were found to be non-significant.
Source of Information :Annual Report:1992-93
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evaluation of a few improved multivoltine silkworm breeds developed with digestive amylase as marker and their hybrid performance in the laboratory.
Personnel :Nair GS, Rao CGP, Chatterjee SN
Project Period :1992-1993
Objectives :To evaluate hybrid performance of the breeds combination with NB18 and PM x NB18 as check hybrid.
Results/Recommendations :With regard to the absolute shell weight, three of the new hybrids showed little increase in shell weight, whereas PM x NB18 showed 9.8% heterosis. No positive heterosis could be realized for shell ratio and it supports our knowledge on the genetic architecture available on this particular trait. The data thus indicates that need for further trials of the hybrids in large scale during summer as also in other seasons with lesser agro climatic conditions.
Source of Information :Annual Report:1992-93
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Development of package of practices for silkworm rearing suitable to Andhra Pradesh-Identification of silkworm hybrids suitable to Andhra Pradesh-Identification of multi x bivoltine silkworm hybrids suitable to Andhra Pradesh. (RSRS Ananthapur)
Personnel :Sivarami Reddy N, Murthy BN, Vidyunmala S
Project Period :1992-1997
Objectives :To identify multi x bivoltine silkworm hybrids suitable to Andhra Pradesh.
Results/Recommendations :Several combinations of multi x bivoltine silkworm hybrids have been tested and multi-bivoltine silkworms viz., MY1, P2D1, RD1, BL24 and BL26 in combination with bivoltines have been found suitable to Andhra Pradesh conditions. These crosses have given significantly more yield over the control (PM x NB4D2).
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Development of package of practices for silkworm rearing suitable to Andhra Pradesh-Identification of silkworm hybrids suitable to Andhra Pradesh-Identification of bi x bivoltine silkworm hybrids suitable to Andhra Pradesh. (RSRS Ananthapur)
Personnel :Sivarami Reddy N, Murthy BN, Vidyunmala S
Project Period :1992-1997
Objectives :To identify bi x bivoltine silkworm hybrids suitable to Andhra Pradesh.
Results/Recommendations :Bivoltine silkworm combinations like CSR2 x CSR4 and CSR2 x CSR5 have been found suitable to Andhra Pradesh.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Development of bivoltine sericulture for hill areas-Breeding of bivoltine for improvement of survival rate and shell ratio. (RSRS, Coonoor)
Personnel :Bhargava SK, Ramesh Babu, Chauhan TPS, Rajalakshmi E, Lakshmanan V, Kamble CK
Project Period :1992-1997
Objectives :
· To evolve bivoltine silkworm races for better production and survival rate.
· To develop better bivoltine silkworm races for hill areas.
Results/Recommendations :Six CNR hybrids namely, CNR4 x CNR3, CNR4 x CNR10, CNR5 x CNR3, CNR7 x CNR3, CNR14 x CNR3 and CNR15 x CNR1 were identified combining with shell ratio breeds evolved in the another experiment, with a shell ratio ranging from 22.53 to 23.17%, AVFL-1044 to 1296 m and of reelability 83.10 to 95.50%.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-On farm/field trial of multi x bi hybrids.
Personnel :Rama Mohana Rao P, Raghavendra Rao D, Premalatha V, Jayaswal KP
Project Period :1992-1998
Objectives :To improve cocoon productivity in multivoltine breeds.
Results/Recommendations :BL24 x NB4D2 gave an yield of 44 kg/100 dfls as compared to 36.85 kg in PM x NB4D2 in Karnataka; 41 kg as against 34.85 g in Tamil Nadu and 45.6 kg a against 38.89 kg in Andhra Pradesh. BL23 x NB4D2 recorded an yield of 26.26 kg as against 20.62 kg in PM x C.Nichi.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Silkworm crop improvement-Improvement of productivity of silkworm breeds/hybrids for dry zone farming-Characterization of breeding resource material.
Personnel :Shanthi R, Rama Mohana Rao P, Chatterjee SN, Jayaswal KP
Project Period :1992-1993
Objectives :To characterize the breeding resource material through biochemical analysis.
Results/Recommendations :Ten basic stocks were utilized. Quantitative, qualitative and biochemical analysis were carried out. Variability was more for larval length, weight of newly hatched larvae and volume of larvae.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore-2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Utilisation of breeding resource materials from germplasm (CSR&TI, Mysore).
Personnel : Nirmal Kumar S, Mal Reddy N, Suresh Kumar N
Project Period :1993-1994
Objectives :To improve the productivity by improving the cocoon shell ratio (above 2%) with medium cocoon weight.
Results/Recommendations : The breeding lines, NK-25 and NK-31 have registered cocoon shell ratio of 22.1% and 21.6% respectively. All the lines have shown survival above 85% except NK-23.
Source of Information :Annual Report:1993-94
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Improving the sericultural productivity under rainfed/semi irrigated condition-Development of package of practices for mulberry- Testing of newly evolved silkworm hybrids of CSR&TI, Mysore. (RSRS, Kodathi)
Personnel :Koundinya PR, Shantala R
Project Period :1993-1994
Objectives : To test newly silkworm hybrids evolved at CSR&TI, Mysore.
Results/Recommendations : 21 bivoltine hybrids were evaluated during the period. KS x KA for survival and AT x KA for SR were found superior.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Three way cross breed testing. (RSRS, Salem)
Personnel :Somasundaram P, Suresh AH, Kapila ML
Project Period :1993-1994
Objectives : To test three way crosses evolved at CSRTI, Mysore.
Results/Recommendations :22 bivoltine combinations of three-way cross were reared. Highest ERR was recorded in NC x KA (82.7), SRT in KS x KA (24.48%) and SCW in SS x KA (1.94 g). During 1994, 20 combinations of three-way cross breeds were reared. Among them, FT x NB4D2 was better on cocoon yield (76% ERR) followed by FT x KA (21.7%) and TC x CC1 (21.6%).
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Multi x bi hybrid testing under AICES programme. (RSRS, Salem)
Personnel :Somasundaram P, Punithavathy G, Shekar MA, Kapila ML
Project Period :1993-1994
Objectives : To test Multi x bi hybrids under AICES programme.
Results/Recommendations :4 multivoltine hybrids RD1 x NB18, P2D1 x NB18 performed better than other hybrids. (55.768 kg/100 dfls).
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Test of amylase isozymes as marker to improve survival potential of a commercial breed by backcross breeding.
Personnel :Patnaik AK, Morrison MN, Ashwath SK
Project Period :1994-1997
Objectives :To analyse the amylase isozymes in commercial breeds.
Results/Recommendations : The commercial breed NB18 with 'null' type of cathodic amylase was used as the recurrent parent and a donor with '4 band' type was selected. The NB18 stock was introgressed with 4 band amylase isozyme from MV donor (PM) from BC1 to BC9, the data indicated significant improvement in survival in the evolved line as compared to the recurrent parent. The mean estimates of the five crops data indicated an overall increase of 7% in survival in the evolved line over its recurrent parent, without any deterioration in the yield traits.
Source of Information :Annual Report:1995-97
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolving high shell ratio percentage, high survival breed using amylase isozyme as a surrogate parameter.
Personnel :Patnaik AK, Morrison MN, Ashwath SK
Project Period :1994-1997
Objectives :Breeding of high shell ratio and survival bearing breeds using amylase as biochemical marker.
Results/Recommendations :The NC2 line developed using the high shell ratio breed CSR2 as recurrent parents was similarly introgressed with '4 band' amylase and the bed selections with the desired isozyme type.The breeding scheme involving the CSR2 and CSR5 stocks was completed from BC1 to BC9 by introgressing 4 band and 5 band amylase isozymes from PM and Nistari respectively. The data showed that the evolved lines had better survival over their respective recurrent parents, without any significant deterioration in cocoon traits.
Source of Information :Annual Report:1996-97, Directory of Concluded Projects, CSRTI, Mysore 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Molecular biology approach to strengthen silkworm breeding-Isolation and purification of antiviral proteins from the gut juice of silkworm, Bombyx mori.
Personnel : Ramesh Kumar, Chinya PK, Datta RK
Project Period :1994-1996
Objectives :To generate information towards the genetical background of higher germ load tolerance shown by specific multivoltine races and better understanding of insect immunity at molecular level.
Results/Recommendations :The results revealed that 88, 12.6 and 94% pupae survived in fraction A, fraction B and fraction C treated batches respectively. Whereas 100% mortality was observed in positive control batch.
Source of Information :Annual Report:1994-96
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Development of silkworm breeding technology-Development of hybridization technique-Identification of productive bivoltine hybrids with high raw silk recovery.
Personnel : Basavaraja HK, Mal Reddy N, Datta RK
Project Period :1994-2000
Objectives : To develop productive single hybrids with high raw silk recovery for commercial exploitation.
Results/Recommendations : The authorized productive hybrids viz., CSR2 x CSR4, CSR2 x CSR5, CSR3 x CSR6, CSR12 x CSR6 and CSR16 x CSR17 were reared five times during the period. Significant differences were observed for survival, cocoon shell weight, cocoon shell ratio, raw silk % and filament length when compared to KA x NB4D2.
Source of Information :Annual Report:1994-2000
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Field testing of elite bivoltine hybrids.
Personnel : Niramal Kumar S, Ramesh Babu M, Ahsan MM
Project Period :1994-1996
Objectives : Improving the productivity of raw silk and fibre quality, 5 hybrids viz., CSR1 x CSR4, CSR2 x CSR4, CSR2 x CSR5, CSR3 x CSR6 and CSR10 x CSR11 were identified based on evaluation index for field testing.
Results/Recommendations :The quantity of leaf fed at fifth age (>1200kg/100dfls) showed significant positive effect in getting higher cocoon yield. Precisely, the dependent factor, cocoon yield/100 dfls is thus influenced significantly by the independent factors namely, temperature and humidity (at the rearing place), bed spacing, quantity of leaf fed at 5th stage, incidence of diseases (%) and disease control measures.
Source of Information :Annual Report:1994-96
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Genetical studies in aid of silkworm breeding-Estimation of penetrance of mutants in silkworm marker stocks and their characterization for yield traits/Location and mapping of the major loci for cocoon weight, shell weight and SR%.
Personnel : Ashwath SK, Patnaik AK, Morrison MN, Pallavi SN, Datta RK
Project Period :1994-1998
Objectives :To study the linkage analysis of QTLs for cocoon and shell weight.
Results/Recommendations :Representative markers of all the available linkage groups are to be used for the linkage analysis of quantitative traits, especially cocoon weight and shell weight. The results of three trials revealed the significant effects of eleven linkage groups out of the twenty two analyzed for the cocoon weight, shell weight and shell ratio, Interestingly, out of these eleven markers, ten showed positive QTL effects of the wild type parent while in the case of the 24th linkage group represented by 'Sel' marker, negative effects were found for cocoon weight and shell weight.
Source of Information :Annual Report:1997-98
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Development of multi-marker stocks and raising of inbred lines.
Personnel : Ashwath SK, Patnaik AK, Chatterjee GK
Project Period :1994-1996
Objectives :Identification of linkage groups influencing the quantitative traits especially cocoon weight and shell weight.
Results/Recommendations :The non-significance of contingency X2 test confirmed that the estimated map distances were in agreement with the established linkage map, for cutting down the number of crosses to identify linkage groups influencing quantitative traits. So far, five multimarker stocks carrying representative markers from 25 linkage groups have been synthesized.
Source of Information :Annual Report:1994-96
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Improvement of fibre quality in cross-breeds.
Personnel : Raghavendra Rao D, Premalatha V
Project Period :1994-1998
Objectives : To improve the fibre quality along with the other important economic traits.
Results/Recommendations : The 9 lines have shown boil-off loss ratio of 23.9 to 25% and a neatness of 86p. Hybrid evaluation was done to identify the suitable hybrid combination. The identified hybrids such as 96A x CSR5, 96C x CSR2 and 96E x CSR5 have shown >85% pupation, >22 cg shell wt and >20.0% SR and neatness of >85p, with a boil-off loss of <25%.
Source of Information :Annual Report:1997-98
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Testing of new multi x bi hybrids of CSR&TI, Mysore. (RSRS, Chamarajanagar)
Personnel : Vindhya GS, Dayananda
Project Period :1994-1996
Objectives : To test new multi x bi hybrids evolved at CSR&TI, Mysore.
Results/Recommendations :BL23 x NB4D2 recorded 13.69 kg/10000 larva, 84.4% survival, 1.583 g cocoon weight, 18.19% shell ratio. BL53 x NB4D2 recorded 14.851 kg/10000 larvae, 86% survival, 1.709 g cocoon weight, 17.80% shell ratio. BL20 x BL21 (Control hybrid) recorded 10,498 kg/10000 larva, 94.02% survival, 1.169 g cocoon weight and 12.17% shell ratio.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Testing of new multi x bi hybrids. (RSRS, Chamarajanagar)
Personnel :Dayananda, Vindhya GS
Project Period :1994-1996
Objectives : To test new multi x bi hybrids evolved at CSR&TI, Mysore.
Results/Recommendations :BL23 x NB4D2 recorded a maximum cocoon yield of 13.659 kg/10,000 larva with cocoon weight of 1.587 gm, shell weight 0.289 gm and shell ratio of 18.19%. While control BL20 x BL21 recorded a cocoon yield of 10,498 kg/10,000 larvae with cocoon weight 1.169 gm, shell weight of 0.154 gm and shell ratio of 13.17%.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Genetics of quantitative traits of commercial importance in silkworm-Genetics of cocoon shell parameters.
Personnel :Majumder PP, Patnaik AK, Ashwath SK, Manjunath DS
Project Period :1994-1996
Objectives :To analyse the commercial parameters in new breeds of silkworm.
Results/Recommendations :The cocoon and shell parameters have been analysed for the breeding groups, sex wise in top, middle and bottom categories in PM and NB4D2 stocks from four cycles of rearing. Under the 2nd set of experiments, data was collected from additional two cycles of rearing NB4D2.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Genetics of quantitative traits of commercial importance in silkworm-Genetics of post cocoon parameters.
Personnel :Majumder PP, Patnaik AK, Ashwath SK, Manjunath DS
Project Period :1994-1996
Objectives :To study the post cocoon parameters of new silkworm breeds.
Results/Recommendations :The data on post cocoon parameters was compiled in the top, middle and bottom categories of the measured groups in PM and NB4D2 stocks in both sexes by conducting four cycles of rearing. Further data was collected from two additional cycles in NB4D2 under the II set of experiment.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-Breeding for isolation of silkworm breed with low denier and size deviation in single cocoon filament.
Personnel :Rama Mohana Rao P, Vasumathi, Premalatha V, Jayaswal KP, Ahsan MM
Project Period :1994-1998
Objectives :To evolve multivoltine breeds with finer denier and lower size deviation in silk filament.
Results/Recommendations :Twenty eight bivoltine breeds were analyzed for size deviation. In some breeds it was a sudden decrease, while in others it was a gradual decrease.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore-2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-Improvement of silk content in cross breeds through hybridization.
Personnel : Premalatha V, Raghavendra Rao D, Sudha VN, Rama Mohana Rao P
Project Period :1994-1998
Objectives :Development of multivoltine breeds with high content of raw silk.
Results/Recommendations :Breeding programme was initiated using multivoltine female parent with high shell ratio and CSR male parent with high shell ratio and SR% (10 lines).
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-Improvement of fiber quality in multivoltine silkworm.
Personnel :Sudha VN, Premalatha V
Project Period :1994-1998
Objectives :Development of multivoltine breeds with lesser boil-off loss ratio.
Results/Recommendations :Boil off loss in 23 polyvoltine breeds and 16 multi x bi hybrids were estimated. It ranged from 21.83 to 29.8% in pure races and 23.2 to 28.9 in hybrids.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-On farm/field trial of new multivoltine hybrids.
Personnel :Rama Mohana Rao P, Raghavendra Rao D, Premalatha V, Ahsan MM
Project Period :1994-1998
Objectives :To evaluate the rearing performance of new silkworm hybrids at field level.
Results/Recommendations :Three multi x bi hybrids for irrigated areas viz., BL43 x NB4D2, BL44 x NB4D2 and BL45 x NB4D2 and 2 hybrids for rainfed areas viz., BL51 x NB4D2, BL53 x NB4D2 were tested. BL43 x NB4D2 indicated superiority in cocoon yield (19%), shell weight (13%), filament length (13%) and renditta reduced by 12% in irrigated areas. The improvement in new hybrids ranged from 37-42% in yield, 100% in shell weight, 31-37% in SR and renditta reduced by 60% compared to control, PM x C.Nichi.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-Improvement of silk content in cross breeds through hybridization.
Personnel : Premalatha V, Raghavendra Rao D, Sudha VN, Rama Mohana Rao P
Project Period :1994-1998
Objectives :Development of superior multivoltine hybrids suitable for tropics.
Results/Recommendations :Ten lines were continued. 95A recorded high survival (97.6%), cocoon yield (14.7 kg) for 10,000 larvae, cocoon weight (1.48 gm) and shell weight (0.26g).
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-Improvement of fiber quality in multivoltine silkworm.
Personnel : Premalatha V, Raghavendra Rao D, Sudha VN
Project Period :1994-1998
Objectives :Development of multivoltine breeds with lesser boil-off loss ratio.
Results/Recommendations :Breedng programme was initiated by crossing productive multivoltine and bivoltine with high neatness and low boil off loss.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-Studies on improvement of silk content in cross breeds through hybridization.
Personnel : Premalatha V, Raghavendra Rao D, Rama Mohana Rao P
Project Period :1994-1998
Objectives :Development of multivoltine breeds with high silk content intheirhybrids.
Results/Recommendations :Five new hybrids were significantly superior to PM x NB4D2 and BL24 x NB4D2 in shell weight (38-48g), shell ratio 20.9-21.6%, filament length 942-961 mts and renditta 7.2-7%
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-Improvement in silk content in cross breeds through hybridization.
Personnel : Premalatha V, Raghavendra Rao D, Rama Mohana Rao P, Thimma Reddy
Project Period :1994-1998
Objectives :To improve the silk content in cross breeds of new multi and bivoltine races.
Results/Recommendations :Five lines BL62, BL65, BL67, BL68 and BL69 were identified. (BL62 x CSR2, BL65 x CSR5, BL67 x CSR5, BL68 x CSR5, BL69 x CSR5) based on hybrid evaluation. The lines were significantly superior to PM and BL24 and they have recorded shorter larval duration (22-23 days) compared to PM (28-29 days). The new hybrids were significantly superior in shell weight, SR%, filament length and renditta.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-Improvement of fiber quality in cross breeds.
Personnel :Raghavendra Rao D, PremalathaV, Ramaswamy G
Project Period :1994-1998
Objectives :Development of multivoltine breeds with lesser boil-off loss ratio.
Results/Recommendations :The lines have shown a boil off loss 23.9 to 25% and neatness of 90 points, pupation>85%, >22 cg shell weight and >20% shell ratio.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-Improvement of silk content in cross breeds through hybridization.
Personnel :Premalatha V, Raghavendra Rao D, Ravindra Singh, Kariappa BK, Ahsan MM
Project Period :1994-1998
Objectives :To evaluate the rearing performance of new bivoltine hybrids.
Results/Recommendations :Out of the 6 evolved multivoltine lines, 5 hybrid combinations viz., BL62 x CSR2, BL65 x CSR5, BL67 x CSR5, BL68 x CSR5 and BL69 x CSR5 were tested in the laboratory. BL67 x CSR5 and BL68 x CSR5 excelled over the two control hybrids BL24 x NB4D2 and PM x NB4D2. BL67 x CSR5 recorded an ERR 9146, yield by weight 16.681 kg, shell weight>35 cg, SR>20%, filament length >950m, raw silk percentage 15% and renditta <7.5.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Evaluation of silkworm hybrids-On farm/field trial of multi x bi hybrids.
Personnel :Premalatha V, Raghavendra Rao D, Ravindra Singh, Mohapatra HC, Kariappa BK, Ahsan MM
Project Period :1994-1999
Objectives :To evaluate the new cross breeds at field level.
Results/Recommendations :
· A third set of 5 new multi x bi hybrid viz., BL62 x CSR2, BL65 x CSR5, BL67 x CSR5, Bl68 x CSR5 and BL69 x CSR5 were tested at RSRSs. BL67 x CSR5 excelled over two control hybrids BL24 x NB4D2 and PM x NB4D2.
· BL24 x NB4D2 was tested under PAD programme in 3 districts of Karnataka. The results of 21,425 dfls reared with 165 farmers has given an average yield of 50.850 kg/100 dfls against 43.514 kg in PM x NB4D2. An average return of Rs.7027.62 against Rs.5665.62 in PM x NB4D2.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity in Indian Silkworm breeds (AIB 3073)-Improvement of productivity in multivoltine silkworm breeds/hybrids-Improvement of fibre quality in silkworm.
Personnel : Raghavendra Rao D, Premalatha V, Ravindra Singh, Ramaswamy G
Project Period :1994-1998
Objectives :Evolution of new multivoltine races with lesser boil-off loss ratio.
Results/Recommendations : Three hybrid combinations 96A x CSR4, 96C x CSR2 and 96E x CSR4 were identified with a boil off loss <25% neatness >85 points, pupation rate >90%, shell weight > 35 cg and shell ratio >20%
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Assessment of quality of silk in breeds/hybrids-Breeding for special character (thin denier).
Personnel : Ramesh Babu, Kishore Kumar CM, Suresh Kumar N
Project Period :1995-1998
Objectives :To develop breeds with thin denier (2.0-2.2) for specific requirement.
Results/Recommendations :
· Out of the 9 breeding lines initiated, 5 parents i.e., JPN7, JPN8, A24, A20C and MBC2 have shown positive response for thin denier. By utilizing the 9 breeding lines identified for thin denier and one for thick denier, fifteen hybrids were prepared and evaluated.
· After hybrid evaluation, the hybrids, JPN7 x B63, BC2 x B63 and JPN8 x B63 were selected for longer filament length (>1300 m) and thin denier (2.1 d-2.4 d), significant differences (P<0.05) were observed among the hybrid for all the metric traits.
Source of Information :Annual Report:1995-98
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding for improvement of productivity of Indian silkworm breeds-Evaluation of the genetic material for identifying promising F1 hybrids.
Personnel : Naseema Begum A, Sudhakara Rao P, Kalpana GV
Project Period :1995-1995
Objectives : To identify hybrids which could be reared successfully in farmers dwellings.
Results/Recommendations : The economic and reeling characters indicated increase in single cocoon weight (2.81 to 9.50%), single shell weight (9.77 to 15.35%), shell ratio (5.89 to 6.83%), raw silk % (4.67 to 6.50) and reelability (3.74 to 6.4%).
Source of Information :Annual Report:1995-96
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Improvement of productivity of multivoltine breeds/hybrids-Breeding for isolation of silkworm breeds with low denier and size deviation in single cocoon filament.
Personnel :Rama Mohan Rao P, Vasumathi, Premalatha V
Project Period :1995-1995
Objectives :Breeding of multivoltine races for lower denier and lesser size deviation in silk filament.
Results/Recommendations : Twenty-eight bivoltine breeds were analyzed for their size deviation. In each breed, filament size was assessed for every 100 m2 from the beginning to the end. Average filament length of the breed studied ranged from 900-1400 m, mean filament size ranged from 2.39 to 3.43 m and the maximum filament size ranged from 4.33 to 2.88. Slope of the denier curve was calculated by regression analysis. Relationship between filament length Vs slope, filament size Vs slope and maximum filament size Vs slope was calculated based on regression analysis.
Source of Information :Annual Report:1995-96
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Multiplication of CSR parental breeds for hybrid production.
Personnel : Bhargava SK, Basavaraja HK, Nirmal Kumar S
Project Period :1995-1996
Objectives :To carry out the multiplication of CSR parental breeds for hybrid production.
Results/Recommendations : The multiplication of CSR parental breeds was carried out to produce quality seed cocoons for preparation of CSR bivoltine hybrids. The average cocoon yield/100 dfls recorded for CSR2, CSR4 and CSR5 during the period under report was 61.9, 62.6 and 63.0 kg respectively. CSR2 has recorded the highest cocoon shell ratio of 22.6%. The average fecundity of CSR2, CSR4 and CSR5 was 554, 536 and 537 respectively.
Source of Information :Annual Report:1996-97
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of bivoltines for stress condition using polyvoltine breeds.
Personnel : Ravindra Singh, Sudhakara Rao P, Kalpana GV
Project Period :1995-1998
Objectives : To evolve robust bivoltines with medium productivity.
Results/Recommendations : Hybrid evaluation was carried out for F14 in the laboratory. Hybrids having survival >90%, SR% >21% and a renditta of <6 were short listed for field trials.
Source of Information :Annual Report:1997-98
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Field performance of CSR bivoltine hybrids.
Personnel : Nirmal Kumar S, Ramesh Babu M, Mal Reddy N
Project Period :1995-1996
Objectives :To evaluate the performance of CSR hybrids at field level.
Results/Recommendations : The field performance of the two productive bivoltine hybrids namely, CSR2 x CSR4 and CSR2 x CSR5 was evaluated for their quality oriented yield potentiality. The results reveal that hybrids, CSR2 x CSR4 and CSR2 x CSR5 have recorded an average filament length of 935 and 1002m, raw silk of 15.5 and of 15.0% renditta of 6.46 and 6.63 and neatness of 96.2 and 95.8p respectively. A total quantity of 723.3 kg cocoons were purchased by KSIC. These cocoons have recorded renditta of 6.2-6.5. The raw silk is graded 3A to 4A.
Source of Information :Annual Report:1996-97
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Testing of new multi x bi hybrids of CSR&TI, Mysore. (RSRS, Chamarajanagar)
Personnel : Vindhya GS, Dayananda
Project Period :1995-1996
Objectives : To test new multi x bi hybrids evolved at CSR&TI, Mysore.
Results/Recommendations :BL53 and NB4D2 recorded a maximum cocoon yield of 14.851 kg/10000 larva with an ERR of 86.0%, single cocoon weight of 1.70 gm, shell weight of 0.305 gm and silk ratio of 17.80%, while control BL20 x BL21 recorded cocoon weight of 1.16 gm, shell weight of 0.15 gm and shell ratio of 13.17%.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Improving the sericultural productivity under rainfed/semi irrigated condition-Development of package of practices for mulberry- Testing of newly evolved silkworm hybrids of CSR&TI, Mysore. (RSRS, Kodathi)
Personnel :Koundinya PR, Shantala R
Project Period :1995-1996
Objectives : To test new multi x bi hybrids evolved at CSR&TI, Mysore.
Results/Recommendations :5 BL hybrids evaluated during the period. PM x NB4D2 recorded higher survival and BL44 x NB4D2 higher SR%.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Studies on behaviour of improved multi x bi hybrids. (RSRS, Salem)
Personnel : Punithavathy G, Shekar MA, Veeraiah TM
Project Period :1995-1996
Objectives : To study the behaviour of new multi x bi hybrids evolved at CSR&TI, Mysore.
Results/Recommendations :7 trials with 6 multi x bi hybrids viz., BL24 x NB4D2 BL26 x NB4D2, BL43 x NB4D2, BL44 x NB4D2, BL45 x NB4D2 and PM x NB4D2, BL43 x NB4D2 has exhibited higher cocoon weight (1.71 g) and shell weight (0.310 g) while BL44 x NB4D2 exhibited the highest SR% (18.95%).
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Studies on behaviour of improved bivoltine hybrids. (RSRS, Salem)
Personnel : Punithavathy G, Shekar MA, Veeraiah TM
Project Period :1995-1996
Objectives : To study the behaviour of improved bivoltine hybrids.
Results/Recommendations : 2 trials with CSR2 x 4, CSR3 x 6, CSR13 x 5, CSR12 x 6 and KA x NB4D2. Maximum ERR of 98.4% was recorded in CSR2 x 4, CSR12 x 6 recorded the highest SR% (24).
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity of Indian silkworm breeds-Improvement of productivity in bivoltine silkworm-Breeding for thermo-tolerant bivoltine breeds/hybrids.
Personnel :Naseema Begum A, Ahsan MM
Project Period :1995-1999
Objectives :Breeding of thermotolerant bivoltine races for silkworm Bombyx mori.
Results/Recommendations :Four thermo-tolerant bivoltine silkworm lines viz., AHT, BHT (Oval) and FHT, GHT (Dumbell) were crossed with eleven productive breeds and a total of forty-four hybrids were evaluated at 31±1°C and relative humidity of 85%. Ten hybrids were short-listed based on multiple trait evaluation index. These selected hybrids were tested 3 times simultaneously at 25±1°C and 31±1°C. Of the 10 hybrids, two hybrids viz., AHT x FHT and BHT x GHT were found promising. The performance of the two hybrids were found significantly superior than control KA x NB4D2. In the hybrid, AHT x FHT, the yield/10,000 larvae by number was 9256 and weight 13.24 kg, shell weight 0.302 g and filament length 959 m. In the hybrid BHT x GHT, the corresponding values were 9122 and 12.31 kg, 0.283 g and 913 m respectively. In control hybrids, KA x NB4D2, the values were found to be 7533 and 8.94 kg, 0.282 g and 830 m respectively.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Molecular genetics of silkworm:Fundamental studies and its application to sericulture-Isolation, purification and characterization of antiviral protein in gut juice and induced VIF in haemolymph of silkworm and Cloning of robustness genes.
Personnel :Datta RK, Jain AK, Ponnuvel KM, Chitra S
Project Period :1995-1998
Objectives :To analyse the biochemical parameters in new breeds of silkworm.
Results/Recommendations :A positive correlation was observed between alkaline protease activity and higher tolerance to BmNPV tolerant and susceptible silkworm breed. Infectivity of BmNPV in the midgut of silkworm breed was studied through EM. Luciferase assay revealed that differential response for tolerant to NPV could be primarily due to epithelial cell barrier. The isolation and purification of antiviral protease has identified the most probable sequence for 28 and 66 kDa. Genomic library of silkworms was constructed in EMBL3 lambda phage. From primary screening of the library with heterologous probes collected from different sources, positive clones that contains (cercopin) gene encoding the antibacterial protein were identified.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on the post cocoon parameters in the cross breed with special reference to size deviation in single cocoon filament.
Personnel :Lakshmi H, Rama Mohana Rao P
Project Period :1995-1996
Objectives :Evaluating the new hybrids for important economic traits especially post cocoon parameters to identify superior cross breeds for commercial exploitation.
Results/Recommendations :Based on the mean performance of quantitative and qualitative traits four hybrids viz., BL33 x NB4D2, BL27 x NB4D2, BL24 x NB4D2 and BL23 x NB4D2 were found to e promising hybrids for commercial exploitation.
Source of Information :M.Sc.Dissertation,1996
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Cloning of robustness genes-Construction of Bombyx genomic libraries.
Personnel : Jain AK, Chitra S, Datta RK
Project Period :1996-1998
Objectives :To construct the Bombyx genomic libraries.
Results/Recommendations :Genomic DNA was extracted and purified from the 3 day old 5th instar larvae of Nistari (multivoltine). High molecular weight genomic DNA of Nistari was used to standardize for partial digestion using mbo I restriction enzyme.
· Genomic library was plated on NZY agar using XL1 blue A (P2) strain of E.coli. The plates were incubated at 37°C for 18h and the plaques were lifted on nylon membrane. The membranes were processed and hybridized with the above said radiolabelled clones.
· Prominent hybridization signals were obtained with BmcccB 19 and PCP 9D1 clones. The clones that showed signal were eluted in SM buffer, purified and stored at 80°C in DmSO.
Source of Information :Annual Report:1996-1998
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Identification of productive F1 hybrids foundation cross and double hybrids with high raw silk recovery.
Personnel : Mal Reddy N, Suresh Kumar N, Ahsan MM
Project Period :1996-2000
Objectives : To develop productive single hybrids with high raw silk recovery for commercial exploitation.
Results/Recommendations : Authorized productive hybrids viz., CSR2 x CSR4, CSR2 x CSR5, CSR3 x CSR6, CSR12 x CSR6 and CSR16 x CSR17 were reared five times during the period under report. Significant differences were observed for survival, cocoon shell weight, cocoon shell ratio, raw silk % and filament length when compared to KA x NB4D2.
Source of Information :Annual Report:1997-2000
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of homozygous lines of the productive breeds by amylase isozyme selection.
Personnel : Morrison MN, Ashwath SK, Datta RK
Project Period :1996-2000
Objectives :To study the egg index in CSR strains of silkworm and their foundation crosses.
Results/Recommendations :For improving better digestibility and survival of commercial breeds, the backcross breeding using NB18 as the recurrent parent and selection of progeny with 4 bonds digestive amylase isozyme pattern by electrophoretic screening was continued.
The results have clearly shown the prospects of employing the new strategy of isozyme marker assisted selection in silkworm breeding for improving the survival and overall performance of the breeds, using multivoltine donors, without sacrificing the productivity traits.
Source of Information :Annual Report:1997-2000
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on egg index in CSR bivoltine silkworm strains and their foundation crosses.
Personnel : Srinivasaprasad, Nirmal Kumar S
Project Period :1996-1997
Objectives :To study the egg index in CSR strains of silkworm and their foundation crosses.
Results/Recommendations :To estimate, three important egg yield traits i.e., the number of eggs/laying, number of eggs/gm and total egg yield/kg of cocoons and analyzed in 12 parental breeds and 8 foundation crosses.
Evaluation index for the three egg yield parameters studied revealed that among parental breeds CSR27 (oval) CSR6 (dumbell) ranked first with higher index values of 61.17, 53.87 respectively. Similarly among foundation crosses (CSR29 x CSR17) (oval) and (CSR6 x CSR30) (dumbell) ranked first with values of 55.45 and 56.01 respectively.
Source of Information :M.Sc. Dissertation, 1997
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on cocoon size uniformity for selection of hybrids in silkworm Bombyx mori L.
Personnel : Ramesh Babu P, Basavaraja HK
Project Period :1996-1997
Objectives :To study the significance of uniformity of cocoons for selection of hybrids in Bombyx mori.
Results/Recommendations :To study the cocoon uniformity in 14 pure breeds (7 ovals and 7 dumbells), four single hybrids, six foundation crosses (3 ovals and 3 dumbells) and three double hybrids developed at CSR&TI, Mysore. The overall results indicate less standard deviation in single hybrids (7.2-7.8) and oval foundation crosses (7.2-7.5) followed by dumbell foundation crosses (7.1-9.5), double hybrids (8.1-10.9), oval pure breeds (9-10.5) and dumbell pure breeds (8.9-13.9)
Source of Information :M.Sc. Dissertation, 1997
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Testing of multi x bi hybrids under race authorization. (RSRS, Chamarajanagar)
Personnel : Vindhya GS, Dayananda
Project Period :1996-1996
Objectives : To test multi x bi hybrids under race authorization programme.
Results/Recommendations :BL23 x NB4D2 recorded maximum cocoon yield of 15.692 kg/10,000 larvae with an ERR of 95.02% single cocoon of 1.651 gm, single shell weight of 0.348 gm and shell ratio of 21.05%. CB5 x P5 and Nistari x YB recorded cocoon yield of 13.942 kg/10000 larvae and 12.935 kg/10000 larvae respectively.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Improvement of sericultural productivity under rainfed/semi irrigated condition-Development of package of practices for mulberry- Testing of newly evolved silkworm hybrids of CSR&TI, Mysore. (RSRS, Kodathi)
Personnel :Koundinya PR, Shantala R
Project Period :1996-1996
Objectives : To test new bivoltine hybrids evolved at CSR&TI, Mysore.
Results/Recommendations :6 new hybrids were evaluated at race authorization programmes. N x YB indicated higher survival and CSR2 x CSR4 higher SR%.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Improving the sericultural productivity under rainfed/semi irrigated condition-Development of package of practices for mulberry-Testing of efficacy of artificial diet on chawki silkworm. (RSRS, Kodathi)
Personnel : Shantala R, Koundinya PR
Project Period :1996-1996
Objectives : To test the efficacy of Artificial Diet on chawki silkworms.
Results/Recommendations :One rearing trial was conducted during the period. Survival percentage of diet fed batch (upto 2nd moult) was 80.2% compared to leaf control which was 89.7%.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Breeding for improvement of productivity of Indian silkworm breeds-Evaluation of silkworm hybrids-On-farm /field trial of bi x bi hybrids.
Personnel :Naseema Begum A, Sudhakara Rao P, Basavaraja HK, Mal Reddy N, Kalpana GV, Raghavendra Rao D, Ashok Kumar K, Ahsan MM
Project Period :1996-1998
Objectives :To develop bivoltine silkworm hybrids for rearing throughout the year and to identify the promising hybrids for commercial exploitation.
Results/Recommendations :Seven promising hybrids were identified based on mono’s evaluation index (index value>50). These hybrids were reared six times in the laboratory and indicated superiority of control hybrids KA x NB4D2 and PM x NB4D2 in majority of the rearing and reeling characters. However, two hybrids viz., A3 x 935E (HSP1) and A3 x 916B (HSP2) were shortlisted and evaluated three times at RSRS, Salem (TN), Anantapur (AP) and Kodathi (Karnataka) during 1997-98. HSP1 and HSP2 indicated significant percentage improvement for pupation rate (8.20 and 20.3 respectively over KA x NB4D2 and PM x NB4D2). Yield/100 dfls in HSP2 was 50 kg as against 48 kg in KA x NB4D2.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Genetical studies in aid of silkworm-Analysis of enzymes for association with specific response to NPV for use as markers.
Personnel :Patnaik AK, Ratna Sen, Nataraju B, Maheswari B
Project Period :1996-1996
Objectives :To analyse the alkaline protease enzyme with specific response to NPV for use as markers.
Results/Recommendations :The analysis of alkaline protease activity in the digestive juice revealed differential response subsequent to inoculation of NPV, in the tolerant and susceptible stocks.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Genetical studies in aid of silkworm-Genetics of tolerance to NPV in silkworm-Linkage analysis to the tolerance to NPV.
Personnel :Patnaik AK, Ratna Sen, Nataraju B, Maheswari B
Project Period :1996-1997
Objectives :To study the genetics of tolerance to NPV in silkworm.
Results/Recommendations :Multi marker stocks carrying representative markers from 23 linkage groups were analyzed for their response to NPV and their susceptibility status was confirmed. The F1 progeny raised using the above stocks and the tolerant parent, indicated partial dominant effect of the latter.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding for robustness.
Personnel : Suresh Kumar N, Basavaraja HK, Nirmal Kumar S
Project Period :1997-2000
Objectives :To develop thermo-tolerant bivoltine hybrids suitable for rearing throughout the year.
Results/Recommendations :All the 4 dumbell breeds recorded cocoon shell ratio ranging from 21.7 to 22.9% as against 21.3% for the control, 2HT, Likewise all the 3 oval breeds have recorded shell ratio of 22.5 to 22.7% as against 21.8% for the control 1HT. Besides, the reeling performance indicated that all the new breeds exhibited higher raw silk % and filament length than those of the control.
Source of Information :Annual Report:1997-2000
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding for high silk quality.
Personnel : Suresh Kumar N, Ramesh Babu M, Kalpana GV
Project Period :1997-1998
Objectives :To identify hybrids with better expression for thin denier and longer filament length to meet the industrial requirement.
Results/Recommendations :After hybrid evaluation, the hybrids JPN7 x B63, MBC2 x B63 and JPN8 x B63 were selected for longer filament length (>1300 m) and thin denier (2.1-2.4 d). Significant differences (P<0.05) were observed among the hybrids for all the metric traits.
Source of Information :Annual Report:1997-98
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Promotion of popularizing the practical bivoltine sericulture technology (PPPBST-JICA-II Phase) silkworm race maintenance technology.
Personnel : Basavaraja HK, Nirmal Kumar S, Mal Reddy N
Project Period :1997-2001
Objectives :To popularize the practical bivoltine sericulture technology.
Results/Recommendations :
· The desired targets, pupation rate >80% and cocoon characters confirming to the original breed characteristics, were achieved in all BSFs. During 9th and 10th crop rearing of basic stock, all the breeds at selected BSFs have recorded pupation rate >85%. The other cocoon traits are confirming to original breed characteristics.
· Comparative performance of CSR breeds rearing during 1997 and 2001 at breeders level clearly reveals that there is uniformity in the maintenance of original breed characters. In addition, purity of the breeds is well depicted by the expression of uniform heterosis from the year 1997 to 2001.
Source of Information :Annual Report:1998-2001
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Introgression of NPV to tolerance genes into productive breeds.
Personnel :Ratna Sen, Ashwath SK
Project Period :1997-2000
Objectives :To introgress the NPV tolerance into productive breeds.
Results/Recommendations :The test cross progeny of CSR4 x BC6S1 and CSR5 x BC6S1 were inoculated with a NPV load of 0.5 x 107 PIB/ml at 2nd instar. Out of the different families screened nine families in CSR4 and seven families in CSR5 were identified as homozygous for NPV tolerance, which recorded very low mortality rates resembling that of the NPV tolerant parent 'TX'.
Source of Information :Annual Report:1999-2000
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Test of survival potential of bivoltine breeds introgressed with amylase isozymes from multivoltine donors-Laboratory evaluation and front-line demonstration of selected hybrids.
Personnel : Morrison MN, Ashwath SK, Datta RK
Project Period :1997-2000
Objectives :To evaluate for front-line demonstration of selected hybrids.
Results/Recommendations :The near isogenic lines (NILs), namely NNB, NC2 and NN1 of the popular bivoltine breeds i.e., NB18, CSR2 and CSR5 respectively had already been developed by isozyme selection subsequent to each backcrossing for ten generations.
Using NILs of NB18, CSR2 and CSR5 developed by amylase isozyme selection, 15 hybrids combination were evaluated in the laboratory under 6 crops. 3 hybrids were shortlisted based on the evaluation index values. The selected hybrids were tested at RSRS, Kodathi, Salem and Anantapur under three trials. The rearing trials indicated the superiority of Gen 3 x Gen 2 hybrid over the control, CSR2 x CSR5 in terms of higher survival and yield trials. The results have clearly shown the prospects of employing the new strategy of isozyme marker assisted selection in silkworm breeding for improving the survival and overall performance of the breeds, using multivoltine donors, without sacrificing the productivity traits.
Source of Information :Annual Report:1999-2000, Directory of Concluded Projects, CSRTI, Mysore 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Detection & mapping of the major loci controlling cocoon traits in silkworm-Location and mapping of the major loci for controlling filament length and denier.
Personnel :Ashwath SK, Pallavi SN
Project Period :1997-2000
Objectives :To locate and map the major loci for controlling filament length and denier.
Results/Recommendations : The existing linkage map of 217 loci in Bombyx mori has no information on the quantitative trait loci (QTL) for any of the yield traits.
Analysis of reeling data of the progeny segregating in the backcrosses indicated significant effects of seven linkage groups for filament length and denier. QTLs of wild type parent contributing for the high values. Interestingly, for the marker 'bl' of the 15th linkage group, the effective were negative, due to the higher value of the marker progeny than the wild type, segregating in the BC. This suggests the possibility of either negative effects of one of the QTLs of the wild type parent or due to complementary action of the QTLs of both the parents.
Source of Information :Annual Report:1999-2000, Directory of Concluded Projects, CSRTI, Mysore 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Development of F1, F2 and BC progress from the inbred lines and detection of RFLPs with regard to the shell character and collection of genomic DNA from individual larvae for all the progenies.
Personnel : Rao CGP, Sreekumar S, Datta RK
Project Period :1997-2000
Objectives : For the development of DNA markers for cocoon shell character and near isogonics lines, two silkworm strains, C-Nichi and B20A having contrasting cocoon shell characters were selected.
Results/Recommendations :The cocoon parameters data of the evolved NILs upto BC8 generation indicated that in the NIL of C-Nichi selected for HSR, the cocoon shell ratio increased up to 5% (from 10-15%) than that of the RP C-Nichi (10%). In the NIL of B20A selected for LSR, the shell ratio decreased to 70% (from 22-15%) than that of the RP, B20A (24%) Introgression of the HSR character from B20A character into C-Nichi has been detected in the NIL of C-Nichi at BC8 generation by RFLP analysis.
Source of Information :Annual Report:1997-2000
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Preliminary studies on the utilization of new bivoltine hybrids as male parent in the multi x bi (cross breed) hybrid.
Personnel :Matam Nazeer, Rama Mohan Rao P
Project Period :1997-1998
Objectives :To assess the performance of the three way cross hybrids involving multivoltine female parent and males of bivoltine F1 hybrids of CSR breeds.
Results/Recommendations :The results clearly shows that single cross hybrids have recorded higher survival and yield than the corresponding three-way cross hybrids. It was found that maximum heterosis was recorded for the traits, cocoon yield and cocoon weight in single cross hybrids. Hence F1 hybrids of CSR breeds can be utilized as male parents in the cross breed preparation involving PM as male parents in the cross breed preparation involving PM as female parent.
Source of Information :M.Sc. Dissertation, 1998
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Comparative analysis of the performance of bivoltine and multivoltine hybrids in Karnataka.
Personnel : Rabindra Nath Sarangi, Srinivasa G
Project Period :1997-1998
Objectives :
· To study and to work out the extent of relationship of each socioeconomic character with bivoltine rearing.
· To study the cropping pattern of the sericulturists and to work out the optimum-cropping pattern for CB and CSR rearers.
· To compare the profitability of rearing CSR hybrids vis-à-vis that of rearing cross breeds (multi x bi).
· To study the rearer's perceptions and preferences between bivoltine pure, bivoltine hybrid and multivoltine silkworm races.
· To study the rearer's opinions on advantages of bivoltine hybrid rearing and experience on the price supports of bivoltine and multivoltine hybrid cocoons.
· To study the rearer’s perceptions, experiences and problems in rearing bivoltine silkworm breeds.
· To study the management strategies followed by the farmers.
· To study the attributes of innovations (BV hybrids) in field condition.
· To suggest the policy guide lines for the development of bivoltine sericulture in the state.
Results/Recommendations :
· As most of the educated, middle aged were found adopting bivoltine races, the same way be promoted through this category of farmers.
· For maximizing the farm returns and for more efficient use of resources, the study indicated to take up coconut plantation on an utilized lands. Ways and means of taking mulberry as an intercrop may be thought of.
· To reduce the cost of production of mulberry and cocoons, shoot rearing method, a labour saving technology can be popularized.
· Educating reelers and rearers about the quality and importance of bivoltine will help rearers to get better prices for their produce.
Source of Information :M.Sc.Dissertation,1998
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :On farm trials-Testing of bivoltine hybrids of RSRS Coonoor. (RSRS, Kodathi)
Personnel :Manjunath D, Chandrasekaran K, Sikdar AK
Project Period :1997-1999
Objectives: To evaluate promising bivoltine hybrids evolved at of RSRS Coonoor for their suitability at regional conditions.
Results/Recommendations :Six new bivoltine hybrids were evaluated during the period. CNR5 x CNR3 recorded significantly higher survival rate by number and weight.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Evaluation of first line hybrids. (RSRS, Salem)
Personnel : Punithavathy G, Thirunavukkarasu, Vijayaraghavan K
Project Period :1997-1998
Objectives : To evaluate first line silkworm hybrids at the regional level.
Results/Recommendations : 3 trials with HSP1, HSP2, III x NB4D2 and KA x NB4D2 were conducted. HSP2 recorded the highest ERR (86%: 13.5 kg) and SR (20.44%). HSP1 recorded the maximum cocoon weight (1.59 g).
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :New multi x bi hybrid testing. (RSRS, Salem)
Personnel :Punivathavathy G, Thirunavukkarasu T, Vijayaraghavan K
Project Period :1997-1998
Objectives : To test New Multi x Bi hybrids developed at CSRTI, Mysore.
Results/Recommendations :5 trials conducted with 7 new multi x bi hybrids viz., BL62 x CSR2, BL65 x CSR5, BL68 x CSR5, BL69 x CSR5, BL24 x NB4D2 and BL20 x NB4D2. BL67 x CSR5 performed better over other hybrids considering the combined data on rearing and reeling parameters. Based on multiple traits, evaluation index the hybrids are ranked as follows :BL67 x CSR5 > BL69 x CSR5 > BL62 x CSR5 > BL24 x NB4D2 > BL68 x CSR5 > BL65 x CSR5 > BL20 x NB4D2.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title : CNR bivoltine hybrid testing. (RSRS, Salem)
Personnel :Punivathavathy G, Thirunavukkarasu T, Vijayaraghavan K
Project Period :1997-1998
Objectives :To test CNR bivoltine hybrids.
Results/Recommendations :3 trials conducted with 4 CNR hybrids and their reciprocal crosses. CNR1 x 5 performed better over other hybrids considering the combined data on rearing and reeling parameters based on multiple trait evaluation index. CNR1 x 15 > CNR3 x 7 > CNR4 x 10 > CNR7 x 3, CNR15 x 1 > CNR3 x 5 > CNR5 x 3 > CNR10 x 4.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Further studies on genetic analysis of yield components by conventional and isozyme markers for their use in silkworm breeding-Linkage analysis of the tolerance to NPV in silkworm and development of NPV tolerant breeds-Linkage and mapping of the gene(s) controlling NPV tolerance.
Personnel :Ashwath SK, Ratnasen
Project Period :1997-2000
Objectives :To study the linkage analysis of the gene controlling NPV tolerance in new silkworm breeds.
Results/Recommendations :Linkage analysis of NPV was carried out using conventional markers of 16 linkage groups. Partial dominance of the tolerant parent was observed. Inoculation of BC progeny with NPV showed significant effects of 8th linkage group for NPV tolerance.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Estimation of heterosis in newly evolved CSR bivoltine hybrids of silkworm Bombyx mori L. at room and high temperature.
Personnel : Guruvinder Raj Verma, Basavaraja HK
Project Period :1998-1999
Objectives :To determine heterosis of newly evolved CSR bivoltine hybrids both at room and high temperatures (25± 1°C and 36±1°C).
Results/Recommendations :In the present study, the parents of robust hybrid, CSR18 and CSR19 only survived at 36±1°C whereas parents of productive hybrids did not survive at 36±1°C and the heterosis and heterobeltosis could be calculated only at 25±1°C. Therefore, the present study clearly indicates that, the robust hybrid CSR18 x CSR19 and their parents showed better tolerance to high temperature when compared to the productive hybrids.
Source of Information :M.Sc.Dissertation,1999
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Development of viable sex-limited breeds of silkworm-Breeding for viable sex-limited breeds of bivoltine silkworm with coloured cocoons.
Personnel : Sudhakara Rao P, Ahsan MM, Basavaraja HK
Project Period :1998-2000
Objectives :To evolve productive bivoltine sex-limited breeds, 10 productive breeds were selected and introduced sex-limited cocoon colour with NB4D2, CC1 (SL) as donor parents.
Results/Recommendations :Three promising sex-limited cocoon colour polyvoltine breeds viz., PM (SL)-female golden yellow and male greenish yellow BL27 (SL) and 1 (SL). Female Golden yellow and male white were identified on the basis of combining ability and heterotic studies. Significant GCA effects were observed in MR1(SL) for fecundity, cocoon yield/10,000 larvae both by number and weight and cocoon shell weight and 3L27 (SL) for fecundity, hatching% and yield/10,000 larvae both by number and weight. The identified breeds are being maintained in multivoltine breeding laboratory as breeding material.
Source of Information :Annual Report:1999-2000
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on construction of primers, amplification of DNA by PCR and cloning of DNA fragments.
Personnel : Ponnuvel KM, Sreekumar S, Datta RK
Project Period :1998-1999
Objectives :To study the construction of primers, amplification of DNA by PCR and cloning of DNA fragments.
Results/Recommendations : The amino acid sequences obtained from the above experiment were compared with other lepidopteran proteins and alkaline protease sequences using BLAST analysis at Bioinformatic centre, IISc, Bangalore.
The protein sequences were further analyzed to synthesize suitable up and down arbitrary primers using degenerative codons. Further, these amino acid sequences were back translated into DNA using GCA (wisconsin package) program for codon frequency. These available DNA sequences will be used for designing up and down primers for amplification of DNA.
Source of Information :Annual Report:1998-99
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Testing of multi x bi hybrids. (RSRS, Chamarajanagar)
Personnel :Sudha VN, Mala VR, Subramaniam RK, Kamble CK, Vinod Kumar, Babu GKS, Thiagarajan V
Project Period :1998-2001
Objectives : To test multi x bi hybrids for their suitability at the regional level.
Results/Recommendations :The trial taken at farmers level for 3 years recorded 30.55 kg/100 dfls, Rs.105.06/kg with 1.208 g cocoon and 14.9% for BL24 x C.Nichi hybrid against PM x C.Nichi (control traditional cross) which recorded 27.54 kg/100 dfls, Rs.88.62/kg, 1.061 gm cocoon weight and 12.8% shell ratio.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :On farm trials-Testing of M x B hybrids of CSR&TI, Mysore. (RSRS, Kodathi)
Personnel :Shantala R, Chandrasekaran K, Manjunath D, Sikdar AK
Project Period :1998-1999
Objectives :To evaluate Multi x Biboltine hybrids of CSR&TI, Mysore at regional condition.
Results/Recommendations : Five trials were conducted for 5 new hybrids along with controls. All the combinations have survival ranging from 82 to 86% and BL67 x CSR5 has maximum SR%.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :On farm trials-Testing of bivoltine hybrids under race authorization programme. (RSRS, Kodathi)
Personnel :Shantala R, Chandrasekaran K, Manjunath D, Sikdar AK
Project Period :1998-1999
Objectives : To test bivoltine hybrids under authorization programme.
Results/Recommendations :Four new bivoltine hybrids were evaluated in 2 seasons. Recorded data indicated higher survival in CNR4 x CNR3 and CSR3 x CSR6 hybrids which showed maximum shell weight and SR%.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Development of productive sex limited polyvoltine breeds-Evolution of polyvoltine silkworm breeds with sex-limited cocoon colours-Breeding sex-limited polyvoltine strains with cocoon colours.
Personnel :Ravindra Singh, Premalatha V, Raghavendra Rao D, Ahsan MM
Project Period :1998-2003
Objectives :To evolve sex limited polyvoltine breeds with coloured cocoons.
Results/Recommendations :Three cocoon colour sex-limited polyvoltine silkworm breeds viz., BL27(CSL), MR1(CSL) and PM(CSL) were developed. The females are golden yellow and males are greenish yellow/white. The breeds are being maintained as breeders stock.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding for disease resistant silkworm (AIB3138).
Personnel :Nataraju B, Ratna Sen, Premalatha V
Project Period :1999-2001
Objectives :To evolve productive bivoltine and multi x bi hybrids resistant to BmDNV1. A total of 60 silkworm breeds have been screened for resistance to BmDNV1.
Results/Recommendations :Of the total incidence of flacherie caused by the non-occluded virus, 43% is caused by the synergistic infection of BmIFV and BmDNV1. By utilizing the breeds resistant to BmDNV1, the infection by BmIFV can be avoided indirectly.
Source of Information :Annual Report:1999-2001
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Influence of cocoon weight on the manifestation of hybrid vigour in multivoltine x bivoltine F1 hybrids.
Personnel : Sipra Mondal, Ravindra Singh
Project Period :1999-2000
Objectives :To know the manifestation of hybrid vigour in quantitative characters in polyvoltine x bivoltine F1 hybrids between low, medium and high cocoon weight polyvoltine and bivoltine breeds of the mulberry silkworm Bombyx mori.
Results/Recommendations :
· They show variability in quantitative characters in silkworm breeds and F1 hybrids between low, medium and high cocoon weight polyvoltine and bivoltine silkworm breeds.
· Study on the hybrid vigour demonstrated maximum heterosis in low x medium cocoon weight F1 hybrid.
· This study may be useful in identification of suitable parents/hybrids for breeding/commercial exploitation.
Source of Information :M.Sc. Dissertation, 2000
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Performance of CSR hybrids.
Personnel :Geetha GS
Project Period :1999-2000
Objectives :To document the details of knowledge and adoption of the new technologies in rearing CSR hybrids and farmers opinion on the same.
Results/Recommendations :An average yield of 63 kg/100 dfls and price of Rs.200/kg were obtained for CSR hybrids which were very high compared to the cross breed (39 kg/100 dfls and Rs.110/kg). It was noticed that farmers had positive attitude towards CSR race because of the high yielding capacity and higher price. They were also of the opinion that occurrence of the disease was less in CSR hybrids compared to that in cross breed.
Source of Information :Annual Report:1999-2000
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :On farm trials-Testing of new robust bivoltine hybrid of CSR&TI, Mysore. (RSRS, Kodathi)
Personnel : Shivashankar N, Shantala R, Magadum SB
Project Period :1999-2000
Objectives : To test hybrid performance at regional condition.
Results/Recommendations :Three rearing trials conducted during the period. Data indicated significantly higher survival rate in test hybrid compared to control.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :On farm trials-Testing of new bivoltine developed by Amylase isozyme selection. (RSRS, Kodathi)
Personnel : Shivashankar N, Shantala R, Magadum SB, Sikdar AK
Project Period :1999-2000
Objectives : To evaluate hybrids at regional conditions.
Results/Recommendations :Five trials were conducted during the period. Data indicated significantly higher survival in Gen3 x Gen2 compared to others.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :On farm trials-Testing of productive bivoltine hybrids of CSR&TI, Mysore. (RSRS, Kodathi)
Personnel : Shantala R, Shivashankar N, Magadum SB, Sikdar AK
Project Period :1999-2000
Objectives : To evaluate hybrids at regional conditions.
Results/Recommendations :Five trials were conducted during the period. Data indicated significantly higher survival by number and weight and other parameters in test hybrids compared to control.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :On farm trials-Testing of thin denier bivoltine hybrids of CSR&TI, Mysore. (RSRS, Kodathi)
Personnel : Shantala R, Shivashankar N, Magadum SB, Sikdar AK
Project Period :1999-2000
Objectives : To evaluate hybrids at regional conditions.
Results/Recommendations :Five rearing trials were conducted during the period. Data indicated significant increase in SR percentage of test hybrid compared to control.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Technology trials at RSRS, Salem- Robust bivoltine hybrid testing. (RSRS, Salem)
Personnel :Punithavathy G, Thirunavukkarasu T, Vijayaraghavan K
Project Period :1999-2001
Objectives : To evaluate hybrids at regional conditions.
Results/Recommendations :3 trials conducted with 2 bivoltine hybrids viz., CSR18 x 19 and KA x NB4D2. CSR18 x 19 recorded maximum ERR of 92.95%, 14.47 kg and 21.4% of SR compared to control.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Technology trials at RSRS, Salem-Productive bivoltine hybrid testing. (RSRS, Salem)
Personnel :Punithavathy G, Thirunavukkarasu T, Vijayaraghavan K
Project Period :1999-2001
Objectives : To evaluate hybrids at regional conditions.
Results/Recommendations :5 trials conducted with CSR16 x 17 and KA x NB4D2 as control. Maximum ERR 86.24%; 16.57 kg and 23.1% of SR were recorded in CSR16 x 17.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Technology trials at RSRS, Salem-Thin denier bivoltine hybrid testing. (RSRS, Salem)
Personnel :Punithavathy G, Thirunavukkarasu T, Vijayaraghavan K
Project Period : 1999-2001
Objectives : To evaluate hybrids at regional conditions.
Results/Recommendations :5 trials conducted with 2 bivoltine hybrids viz., JPN x B63 and KA x NB4D2. JPN x B63 recorded an ERR of 84.11%. SR of 23.1% and denier of 2.28.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Technology trials at RSRS, Salem-Testing of bivoltine hybrids developed through Isozyme amylase selection. (RSRS, Salem)
Personnel :Punithavathy G, Thirunavukkarasu T, Vijayaraghavan K
Project Period :1999-2001
Objectives : To test bivoltine hybrids developed through Isozyme amylase selection under technology trial programme.
Results/Recommendations :Conducted 5 trials with 4 Gen bivoltine hybrids viz., Gen1 x 2, Gen1 x 4, Gen3 x 2 and CSR 2 x 5. Gen3 x 2 recorded the highest ERR of 90.12%, 16.55 kg, SCW 1.84 g, SSW 0.431 and 23.4% SR compared to control.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on cocoon filament size deviation in bivoltine silkworm Bombyx mori L.
Personnel :Runa Paul, Suresh Kumar N
Project Period :1999-2000
Objectives :To study the filament size deviation in 12 parental breeds and 7 hybrids utilizing these parental breeds.
Results/Recommendations :Observation on the filament size variation in the 12 parental breeds and the 7 hybrids reveal that among the parental breeds, CSR3 is more uniform with less slope (-0.00120) and among the hybrids, CSR18 x CSR19 is more uniform with less slope (0.00194).
Source of Information :M.Sc. Dissertation, 2000
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Selection of breeding resource material by screening of breeds for tolerance to high temperature and high and low humidity.
Personnel :Jayaswal KP, Suresh Kumar N, Kalpana GV
Project Period :2000-2002
Objectives :To identify breeding resource material tolerant to high temperature and high humidity and high temperature and low humidity.
Results/Recommendations :Twenty-one short-listed breeds were subjected for three different temperature and humidity conditions namely, high temperature and high humidity (36±1°C and 85±5% RH), high temperature and low humidity (36±1°C and 50±5%RH) and room temperature (25±1°C and 65±5% RH). Based on the performance, 11 breeds were short-listed and were further reared both at high temperature and room temperature. Significant difference (P<0.05) was observed for the trials i.e., pupation rate, cocoon yield, cocoon weight, cocoon shell weight and shell ratio in different temperature and humidity conditions and also for Lines x Temperature interaction between the short listed breeds.
Source of Information :Annual Report:2001-02
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Selection of breeds/hybrids for quality improvement-Identification of productive hybrids with longer filament length and thin denier.
Personnel : Kalpana GV, Suresh Kumar N, Palit AK
Project Period :2000-2006
Objectives :To select hybrids with longer filament length (>1300m) and low denier 2.2-2.6).
Results/Recommendations :The rearing and reeling performance of hybrids of thin denier breed CSR48 with Productive breed S5, robust breed 8HT and disease tolerant breed D7 revealed superiority in CSR48 x S5 for pupation rate, cocoon weight, shell weight and cocoon shell percentage. With regard to filament length and denier, CSR48 x S5 stood first followed by CSR48 x 8HT.
Source of Information :Annual Report:2005-06
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on the reciprocal effect in the hybrids of silkworm Bombyx mori L.
Personnel: Ab Khaliq Dhar, Malreddy N
Project Period :2000-2001
Objectives :Study on the inheritance of qualitative and quantitative characters effecting the silk production in the reciprocal crosses of silkworm hybrids involving PM and CSR breeds.
Results/Recommendations :From the study, it is clear that reciprocal differences occur when the hybrids are prepared with different voltinism.
Source of Information :M.Sc. Dissertation, 2001
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Selection of breeding resource material by screening silkworm breeds for tolerance to BmDNV1, BmIFV and BmNPV.
Personnel : Nataraju B, Balavenkatasubbaiah M, Datta RK,
Project Period :2000-2002
Objectives :To identify breeding resource material tolerant to BmDNV1, BmIFV and BmNPV.
Results/Recommendations :Based on the performance, twenty-one breeds namely, 5HT, 6HT, 7HT, 8HT, 9HT, 10HT, 11HT, B71, B25, B62, A66, A69, A24, NK32, CSR18, CSR19, Diazo, Shunrei, Shogetsu, Kinshu and Show a were selected. The short listed breeds were screened for resistance to BmDNV1 and also at different concentrations of BmNPV and BmIFV. 5HT was found resistant to BmDNV1. The breeds namely, 5HT, 8HT, 10HT, B71, Diazo, A62, Showa, Shunrei and Shogtesu were found to be resistant to BmNPV at 1x105 POBs/ml concentration. 5HT and 9HT were found to be resistant to BmIFV at 10-6 POB/ml concentration. These breeds were utilized as breeding resourced materials.
Source of Information :Annual Report:2000-02
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evaluation of post cocoon parameters and quality assessment of thin denier hybrids.
Personnel : Kalpana GV, Suresh Kumar N, Ramaswamy GN
Project Period :2000-2005
Objectives :Four short-listed hybrids namely, JPN8 x CSR5, A66 x CSR5, B63 x A60 and B65 x A60 were subjected for post cocoon parameters.
Results/Recommendations :The hybrid JPN8 x CSR5 recorded longer filament length of 1700m, denier of 2.58 d, raw silk of 19%, neatness of 90 points and renditta of 5.5.
Source of Information :Annual Report:2000-05
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Performance of CSR hybrid cocoon production in traditional and non-traditional areas of Mandya and Hassan districts.
Personnel : Swamy TP, Hiriyanna
Project Period :2000-2001
Objectives :
· To study the economic performance of CSR hybrid with that of CB.
· To compare the performance of CSR hybrid in traditional area with that of non-traditional area.
Results/Recommendations :The study reveals that rearing of CSR hybrids is more profitable than CB hence, a systemic efforts may be taken up to popularize CSR hybrid in the field for improving production of quality silk and reduction of import of silk especially from China. The advantage of increased profitability of CSR hybrid can be shown to the farmers through result demonstration in different areas.
Source of Information :M.Sc. Dissertation, 2001
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Studies on emergence pattern in polyvoltine silkworm breeds (Temp 008).
Personnel : Ravindra Singh, Raghavendra Rao D, Kariappa BK, Jayaswal KP
Project Period :2000-2001
Objectives :To study the moth emergence pattern in polyvoltine silkworm breeds.
Results/Recommendations :Emergence pattern in 5 polyvoltine silkworm breeds viz., BL23, BL24, BL43, BL67 and PM were studied 5 times. The results indicated that except Pure Mysore, all the breeds showed erratic emergence. However, some improvement was observed in BL67.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evaluation of post cocoon parameters and quality assessment of thin denier hybrids.
Project Period :2001-2005
Objectives :The selected hybrid JPN8 x CSR5 was evaluated for post cocoon parameters and 25 dfls were reared for the purpose.
Results/Recommendations :Test reeling results of the 18 thin denier hybrids revealed marginal difference of reelability, renditta, raw silk percentage and neatness. In addition to the already identified hybrid 8HT x JPN8, two more hybrids JPN7 x 8HT and 5HT x JPN8 expressed less denier ranging from 2.3-2.38 d with filament length ranging from 1500-1590 m. Among the selected hybrids, 5HT x JPN8 exhibited higher raw silk percentage of 20.35 and less renditta.
Source of Information :Annual Report:2004-05
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on inheritance of denier and filament length in silkworm Bombyx mori L.
Personnel :Md. Asraful Haque, Kalpana GV
Project Period :2001-2002
Objectives :To observe the pattern of inheritance for the traits filament length and denier, followed by inbreeding of F1 hybrids to study the heritability of characters from the grand parent and simultaneously back crossing the F1 hybrid with the parents to study the contribution of male and female parent to the F1 hybrids.
Results/Recommendations :For the trait filament length, Mendelian pattern of inheritance could be noticed only in F2 (JPN8 x CSR5 and B63 x A60) progenies and BC2 progeny [(B63 x A60) A60 and (JPN8 x CSR5) CSR5]. However, BC1 i.e., (B63 x A60) B63 and (JPN8 x CSR5) JPN8 does not follow Mendelian pattern of inheritance indicating that the trait filament length is under the control of semi dominant with supporting minor genes.
For the trait denier only the F2 progeny of B63 x A60 and BC2 (B63 x A60) A60 followed the Mendelian pattern of inheritance. This clearly indicates that contribution for the trait denier differs in different breeds. However, in the hybrid JPN8 x CSR5, only BC1 (JPN8 x CSR5) JPN8 followed Mendelian pattern of inheritance indicating that the trait denier is under the control of a semi dominant gene in the breed JPN8.
Source of Information :M.Sc. Dissertation, 2001-02
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding for the development of sustainable bivoltine hybrids-Isolation of robust bivoltine breeds/hybrids.
Personnel :Basavaraja HK, Nataraju B, Suresh Kumar N, Malreddy N, Balavenkatasubbaiah M
Project Period :2001-2006
Objectives :To evolve robust bivoltine breeds/hybrids by utilizing the disease resistant and temperature tolerant breeding materials.
Results/Recommendations :Based on the rearing performance and tolerance to BmNPV, 5 breeds were short-listed. Further, these breeding lines were continued by conducting rearing at room temperature. Resorted to out crossing with productive Japanese breeds to improve the quantitative traits. All the oval breeds have recorded pupation rate ranging from 89-94.7%, the pupation rate ranged from 85.6-94.1% and cocoon shell% ranged from 21.8-23.3%.
Source of Information :Annual Report:2001-06
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Assessment of quality of silk in newly evolved breeds/hybrids.
Personnel : Nanjegowda B, Mal Reddy N
Project Period :2001-2006
Objectives :To study the post cocoon parameters of newly developed breeds/hybrids.
Results/Recommendations :Fifty reelable cocoons were taken from each shortlisted 15 breeds for post cocoon assessment. All the oval breeds have recorded raw silk ranging from 19.1-20.1%, filament length ranging from 1127-1253 mts, reelability of 83.5-85.3% and neatness of 91.0-92.1p while in dumbell breeds, the raw silk percentage ranged from 18.2-19.7%, filament length ranged from 996-1190 mts, reelability ranged from 84.8-86.3% and neatness ranged from 91.5-92.2p.
Source of Information :Annual Report:2005-06
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :On-farm trials of selected hybrids.
Personnel : Mal Reddy N, Kalpana GV, Patil AK
Project Period :2001-2002
Objectives :To test the rearing performance of the selected hybrids at RSRS level.
Results/Recommendations :The hybrids CSR48 x CSR5 recorded filament length of 1106m and denier of 2.43 d as against 1005m filament length and 2.72 denier recorded for the control hybrid, CSR2 x CSR5. All the hybrids have recorded neatness of 93 points.
Source of Information :Annual Report:2001-02
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of robust polyvoltine breeds/hybrids-Evolution of polyvoltine breeds/hybrids tolerant to high temperature.
Personnel : Raghavendra Rao D, Ravindra Singh, Kariappa BK, Bhanuprakash Raj
Project Period :2001-2006
Objectives :To evolve polyvoltine breeds/hybrids tolerant to high temperature and humidity.
Results/Recommendations :Five breeds viz., ND1, ND2, ND3, ND4 and ND5 were developed. Out of 36 hybrids evaluated, ND5 x CSR17 was found promising. In-house testing of the new hybrid recorded an average yield of the 75 kg/100 dfls as against 62 kg/100 dfls in control hybrids PM x CSR2.
Source of Information :Annual Report:2005-06
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of polyvoltine breeds/hybrids resistant to BmNPV.
Personnel : Ravindra Singh, Sharma SD, Raghavendra Rao D, Chandrasekharan K
Project Period :2001-2006
Objectives :To evolve polyvoltine breeds/hybrids resistant to BmNPV.
Results/Recommendations :Four breeds viz., NP1, NP2, NP3 and NP4 were developed. The breeds were developed based on the survival percentage after inoculation of BmNPV and rearing 5th instar larvae at high temperature in alternate generations. One breed NP1 and its hybrid NP1 x CSR17 were found promising.
Source of Information :Annual Report:2005-06
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Breeding for improvement of silk quality in bivoltine silkworm breeds/hybrids (AIB3239)-Development of bivoltine silkworm hybrids with quality silk.
Personnel : Naseema Begum A, Himantharaj MT, Ramaswamy GN
Project Period :2001-2002
Objectives :To develop improved bivoltine silkworm hybrids with cocoon filament size deviation (1.0-1.5), boil-off loss ratio (23-25%) and neatness (92-95p) required for the industry.
Results/Recommendations :One hybrid 916B x A3 scored the highest Index value. Short-listed hybrids will be reared to study the cocoon filament size deviation, boil-off loss ratio and neatness. Directional breeding will be carried out for the improvement of the targeted traits.
Source of Information :Annual Report:2001-02
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on the rate of oviposition with some duration and its impact on hatchability of elite bivoltine races of Bombyx mori.
Personnel : Kunal Sarkar, Mathur VB
Project Period :2001-2002
Objectives :To evaluate the oviposition rate with time duration and its impact on hatchability of elite bivoltine races.
Results/Recommendations :
· There is no significant difference between the treatments in relation to hatching percentage and the occurrence of viable (fertilized) eggs and inviable (unfertilized) eggs. This indicates that there is no relation between the occurrence of unfertilized eggs and duration of oviposition.
· While producing laying to keep for different hibernation schedule especially for autumn/late autumn crop, female may be allowed for prolonged period for oviposition to get 8-10% more fecundity and farmers may fetch 8-10 kg more cocoon yield with more profit margin without incurring any expenditure.
Source of Information :M.Sc. Dissertation, 2002
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on the effect of high temperature and high humidity on parents, foundation crosses, single and double hybrids of bivoltine silkworm Bombyx mori L.
Personnel : Sudip Paul, Basavaraja HK
Project Period :2001-2002
Objectives :To determine the effect of high temperature and high humidity conditions on the rearing performance of pure races, foundation crosses, single hybrids and double hybrids.
Results/Recommendations :The results of the present study clearly indicated that the deleterious effect of high temperature and high humidity on the rearing performance, cocoon shape and size, post cocoon parameters and boil off loss ratio on all the pure races foundation crosses, single hybrids and double hybrids and also suggest that any study involving temperature as one of the environmental factors and viability followed by cocoon traits is a trend setter to provide basis to formulate appropriate selection policies for required environment.
Source of Information :M.Sc. Dissertation, 2002
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Comparative studies on parthenogenesis and performance of different bivoltine F1 hybrids of the silkworm Bombyx mori L.
Personnel : Prabhati Sanyal, Ravindra Singh
Project Period :2001-2002
Objectives :To know the ability of parthenogenetic development, hybrid vigour and cocoon shape variability in some bivoltine F1 hybrids of the silkworm Bombyx mori.
Results/Recommendations :
· The hybrid CSR18 x CSR19 exhibited significant hybrid vigour over mid-parent value for all the seven characters.
· Among 10 bivoltine F1 hybrids, CSR2 x CSR18 exhibited more cocoon uniformity followed by CSR2 x CSR4 and CSR4 x CSR19.
Source of Information :M.Sc. Dissertation, 2002
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Test verification of newly developed silkworm breeds and their hybrids-Test verification of parental breeds-Raising of parental seed cocoons.
Personnel : Naseema Begum A, Pallavi SN, Ashwath SK, Mahalingappa KC
Project Period :2002-2006
Objectives :To evaluate the performance of parental breeds viz., CSR16, Gen2 (dumbell), CSR17, Gen3 (oval), rearing of these breeds were conducted and seed cocoons were generated for preparation of single hybrids.
Results/Recommendations :To evaluate the performance of parental breed CSR2 (SL), 3rd, 4th and 5th trial rearings were conducted. The pupation rate, cocoon weight, shell weight and cocoon shell percentage in female was 89.8%, 1.755 g, 0.315 g, 18.5% and in male was 94.6%, 1.563 g, 0.345g and 22.1% respectively. In addition, the reeling parameters were also studied.
Breed
Reelability (%)
Filament length (m)
Raw silk
(%)
Denier (d)
Neatness (p)
CSR2 (SL) female
Mean
84.0
926
14.4
2.6
90.0
SD
0.02
10.4
0.4
0.03
0.06
CV%
4.05
1.1
2.7
4.9
0.05
CSR2 (SL) male
Mean
84.0
1121
17.5
2.4
92.0
SD
0.07
11.6
0.6
0.04
0.06
CV%
5.70
1.0
3.5
6.3
0.05
Source of Information :Annual Report:2005-06
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Raising foundation crosses for double hybrids.
Personnel : Pallavi SN, Mahalingappa KC, Naseema Begum A
Project Period :2002-2005
Objectives :To evaluate the performance of double hybrids, foundation crosses CSR6 x CSR26 (FC1 dumbbell) and CSR2 x CSR27 (FC2 oval) were reared and seed cocoons were generated for double hybrid preparation.
Results/Recommendations :The data was analyzed for six economic traits using Analysis of Variance. With reference to the performance of FC1 and FC2, the variations recorded for all the six traits were significantly not different.
Source of Information :Annual Report:2004-05
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Test verification of the selected silkworm hybrids in the field-Studies on the egg production aspects of parental breeds of selected hybrids.
Personnel : Mahalingappa KC, Naseema Begum A, Pallavi SN
Project Period :2002-2006
Objectives :To study the egg production aspects of CSR16, Gen2, CSR17, Gen3 (parental breeds), CSR6 x CSR26 (FC1), CSR2 x CSR27 (FC2) were studied in collaboration with NSSP, Mysore.
Results/Recommendations :Egg production aspects of CSR2 (SL) were studied in the laboratory and a total of 19,000 dfls of reproductive seed were prepared. The average egg recovery was 29.3%. Further, a total of 13.9 kg of CSR2 (SL) (parental breed) seed cocoons were raised and supplied to SSPC, NSSO, Ramanagaram to be uitilized as male component for the preparation of commercial egg (PM x CSR2).
Source of Information :Annual Report:2005-06
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Test verification of the selected silkworm hybrids.
Personnel : Joge PG, Naseema Begum A, Ashwath SK, Pallavi S, Mahalingappa KC
Project Period :2002-2006
Objectives :Field testing of (CSR6 x CSR26) x (CSR2 x CSR27) and Gen2 x Gen3 were carried out with the farmers in Southern states.
Results/Recommendations :Field testing of double hybrid (CSR6 x CSR26) x (CSR2 x CSR27) and single hybrid Gen2 x Gen3 were carried out with the farmers of Southern States. The average cocoon yield/100 dfls in double hybrid was 64.0 kg and in single hybrid was 62.3 kg.
Performance of the hybrids in the field
Trial
Hybrid
No. of dfls tested
Yield/100 dfls (kg)
Rate/kg (Rs)
1
(CSR6 x CSR26) x (CSR2 x CSR27)
1,55,600
64.0
149.38
2
Gen2 x Gen3
22,250
62.3
151.00
Source of Information :Annual Report:2005-06
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on hybrid vigour in F1 hybrids between newly evolved multivoltine breed BL67 with CSR breeds of silkworm.
Personnel : Sharmistha Banerjee, Raghavendra Rao D
Project Period :2002-2003
Objectives :To know the magnitude of hybrid vigour expressed in F1 hybrids of new productive multivoltine breed, BL67 with authorized productive bivoltine CSR breeds and hybrids to identify the best heterotic crosses, further to know the variability in cocoon shape in multivoltine x bivoltine hybrids for commercial exploitation.
Results/Recommendations :
· Among 12 F1 hybrids evaluated four hybrids viz., BL67 x CSR4, BL67 x CSR5, BL67 x NB4D2 and PM x NB4D2 and among seven three-way crosses (CSR16 x CSR17) and BL67x(CSR18 x CSR19) are adjudicated as best heterotic hybrids.
· It is observed that BL67 x CSR4 and BL67 x CSR19 were found to be uniform in cocoon shape as these hybrids showed lowest CV% (5.35 and 5.38) among 12 F1 hybrids and 7 three way crosses between multivoltine x bivoltine hybrids.
Source of Information :M.Sc. Dissertation, 2003
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Comparative performance of authorized CSR parental breeds of silkworm Bombyx mori L. at different temperature.
Personnel :Nizia Choudhary, Mal Reddy N, Basavaraja HK
Project Period :2002-2003
Objectives :To assess the effect of different temperature on various qualitative and quantitative characters of newly evolved CSR bivoltine breeds.
Results/Recommendations :The most affected characters due to temperature (32±1°C) are cocoon yield followed by survival, shell weight, cocoon weight and filament length where as the least affected characters are neatness followed by reelability, shell ratio %, filament size and raw silk%. Therefore these breeds (CSR2, CSR3, CSR4, CSR5, CSR6, CSR12, CSR16, CSR17, CSR18, CSR19, KA,& NB4D2) have been recommended for rearing during favourable months (September-February) in South India.
Source of Information :M.Sc. Dissertation, 2003
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on the comparative performance of temperature tolerant and temperature sensitive breeds and hybrids of bivoltine silkworm Bombyx mori L.
Personnel : Harjeet Singh, Suresh Kumar N
Project Period :2003-2004
Objectives :To analyze the performance of temperature tolerant and temperature sensitive breeds and hybrids of the bivoltine silkworm Bombyx mori L under high temperature and high humidity conditions.
Results/Recommendations :From the present study, it is clear that the expression of hybrid vigour is different in hybrids at the two temperature treatments and the level of heterosis present in the hybrids can be influenced by the environment. The hybrid vigour (heterosis and heterobeltosis) calculated for the hybrids indicated that it was high temperature treatment than normal temperature.
Source of Information :M.Sc. Dissertation, 2004
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on heterosis in F1 hybrids between RD1 and CSR breeds of silkworm, Bombyx mori L.
Personnel : Prankrishna Baro, Ravindra Singh
Project Period :2003-2004
Objectives :To improve cocoon characters, evaluate and identify promising F1 polyvoltine x bivoltine hybrids adaptable to dry zones and to know the variability in cocoon shape in F1 hybrids.
Results/Recommendations :Based on the overall performance, it can be concluded that RD1 x CSR5 can be recommended for commercial exploitation in semi and arid conditions of South India.
Source of Information :M.Sc. Dissertation, 2004
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evaluation of new multi x bi and multi x multi hybrids and studies on reproductive behaviour in new multivoltine breeds (AIB3275)-Evaluation of new multi x bi and multi x multi hybrids-Testing of new multi x bi hybrids with the farmers in irrigated areas.
Personnel : Sudha VN, Umadevi K, Prakasha Murthy DP
Project Period :2003-2006
Objectives :The hybrids were tested in four different agroclimatic regions of Karnataka, Andhra Pradesh, Tamil Nadu and Maharashtra through the nested units of CSRTI, Mysore and NSSP.
Results/Recommendations :Six seed crop rearings of ND7 and CSR2 and four seed crop rearings of D1 were completed. Utilizing the seed cocoons 31,320 dfls of Jayalakshmi (ND7 x CSR2) and 5895 dfls of D1 x CSR2 were prepared and supplied to the farmers through the nested units of CSR&TI, Mysore. The hybrid ND7 x CSR2 recorded an average yield of 63.17 kg/100 dfls and D1 x CSR2 recorded 42.4 kg/100 dfls.
Source of Information :Annual Report:2005-06
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Identification of threshold temperature for expression of heat shock protein in the bivoltine breeds of silkworm Bombyx mori.
Personnel : Chitra S, Sreekumar S, Suresh Kumar N
Project Period :2003-2004
Objectives :To identify the temperature and duration required to induced HSP and type of HSP family induced under the thermal stress.
Results/Recommendations :A reverse trend was observed in CSR2 wherein the amount of protein in all the exposure period at 40°C on the 3rd day was less when compared to control and CSR18. It is obvious that the HSP induction or the thermal response manifested by increase in the quality of protein is comparatively earlier in CSR18 than CSR2 and this may be the reason that CSR18 is tolerant to high temperature.
Source of Information :Annual Report:2003-04
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Shuttle breeding approach for development of bivoltine silkworms with better plasticity.
Personnel : Lakshmanan V, Suresh Kumar N, Pandya RK
Project Period :2003-2006
Objectives :To develop bivoltine silkworm breeds/hybrids with better plasticity by adopting shuttle breeding approach.
Results/Recommendations :F12 generation of eight oval and four dumbell lines were reared and three breeds viz., D4, D5 and D6 that showed large variation were continued.
Twenty oval foundation crossed and six dumbell foundation crossed were reared. Foundation crosses were shortlisted based on the rearing, cocoon characters and cocoon uniformity, six oval FCs and four dumbell FCs were shortlisted for the preparation of double hybrids.
Single hybrid test-I: Twenty new single hybrids were reared during Sep/Oct 2005 and based on the rearing, cocoon and fibre parameters, five hybrids namely D1 x D13, D2 x D13, D7 x D13, CSR202 x D13 and CSR204 x D13 were shortlisted for further studies.
Double hybrid test I: 48 double hybrids prepared by using ten selected FCs were reared during Nov/Dec.2005 and based on the rearing, cocoon and fibre parameters, 8 double hybrids were shortlisted.
Source of Information :Annual Report:2005-06
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Improvement of productivity through bivoltine breeding in hill areas-Combining ability studies of CSR and CNR Breeds.
Personnel : Lakshmanan V, Sen AK, Rajalakshmi E
Project Period :2003-2004
Objectives :To identify promising bivoltine hybrids for yield potential and superior cocoon characters.
Results/Recommendations :Selected CSR breeds, viz., CSR2, CSR4, CSR5, CSR13 and B120 along with selected CNR breeds, (CNR1, CNR3, CNR4, CNR14 and CNR15) were reared and 25 CSR x CNR hybrids were prepared. Two hybrids (CSR13 x CNR3 and CNR4 x B120) were short listed for the final test based on rearing, cocoon and reeling parameters as also the cocoon uniformity. Based on the final trials, the hybrid CSR13 x CNR3 was selected.
Source of Information :Annual Report:2003-04
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :cDNA cloning and expression of antiviral gene in Bombyx mori.
Personnel : Virendra Kumar, Ashwath SK, Nataraju B, Dandin SB
Project Period :2003-2006
Objectives :Identification of the antiviral gene in gut juice and its cloning and expression in Bombyx mori, the silkworm gut juice was collected on 3rd day of 5th instar larvae of different multivoltine and bivoltine races by inducing the larvae to vomit through brief exposure of chloroform vapour or by mild electric shock.
Results/Recommendations :The results showed that the 28 kDa antiviral protein could be exploited as a functional protein marker to evaluate the resistance and susceptibility of silkworm breeds. The partial characterization and peptide mapping protocols were standardized.
Source of Information :Annual Report:2005-06
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Induction of heat shock proteins under temperature stress in silkworm Bombyx mori L races analysed by SDS PAGE.
Personnel : Rajesh GK, Chitra S
Project Period :2004-2005
Objectives :To understand the nature of heat induced protein synthesis in tropical and temperature silkworm strains as a preliminary attempt.
Results/Recommendations :
· CSR2 (4th and 5th instars) was more affected by the hike in temperature rather than its duration. Its protein suffered damage even by temperature hike for a short duration.
· 40°C treatment caused more protein damage in 4th instar than in 3rd instar in both races.
· Exposure to high temperature in surviving animals lead to a sudden hike in protein levels at 68-97 kDa region in both races in the order Nistari > CSR2 male>CSR2 female, indicating stress related, race and sex specific transcription strategy.
· New protein bands appeared in the molecular weight range of 97-205, 68-97 and 29-43 kDa possibly representing HSP: 100, 90, 70 families and 34-35 kDa.
Source of Information :M.Sc. Dissertation, 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Studies on the comparative rearing and reeling performance of existing cross breeds with PM x JPN8.
Personnel : Arambam Manju Devi, Nanje Gowda B
Project Period :2004-2005
Objectives :To study the comparative rearing and reeling performance of existing cross breeds with PM x JPN8.
Results/Recommendations :The results from the present study clearly indicates the superiority of PM x JPN8 over the existing popular hybrids PM x CSR2 and PM x JPN8 for important reeling and quality parameters.
Source of Information :M.Sc. Dissertation, 2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Analysis of DNA polymorphism using microsatellite markers in the silkworm Bombyx mori.
Personnel :Subarna Pal, Sreekumar, Aswath SK
Project Period :2005-2006
Objectives :
· To understand the genetic diversity with regard to repetitive DNA in the silkworm breeds.
· To know the extent of DNA polymorphism with regard to allelic variations in the microsatellite loci between MV and BV Silkworm breeds.
· To identify race specific DNA profile using microsatellitic marker for establishing molecular IDs for each SW breed.
Results/Recommendations :The present investigation has clearly indicated the usefulness of microsatellite markers in understanding the genetic diversity in SW breeds with regard to the polymorphism of repetitive DNA. Further breed specific microsatellite markers have also been identified, which may be used as molecular IDs for protection of the breeders rights. The study has also come out with the microsatellite alleles, which are specific to BV and polyvoltine SW breeds. As these 2 groups are highly divergent with regard to quantitative and qualitative traits, some of these microsatellite alleles could be possibly closely linked to genes controlling the economic traits.
Source of Information :M.Sc. Dissertation 2006
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance of bivoltine silkworm races (AIB-3294)-Maintenance of productive bivoltine breeds.
Personnel :Mal Reddy N, Basavaraja HK
Project Period :2004-2006
Objectives :To rear and maintain the productive breeds namely CSR2, CSR3, CSR4, CSR5, CSR6, CSR12, CSR16, CSR17, CSR26 and CSR27 in accordance with the maintenance technology.
Results/Recommendations :All the breeds recorded cocoon weight, shell weight and cocoon shell percentage on par with the bench mark values. Simultaneously, during the course of maintenance, pupation rate was also given equal importance and maintained above 90%. The performance of the breeds is in conformity with the original breed characteristics.
Source of Information : Annual Report: 2005-2006
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance of bivoltine silkworm races (AIB-3294)-Maintenance of robust bivoltine breeds.
Personnel :Suresh Kumar N, Basavaraja HK
Project Period :2004-2006
Objectives :To rear the robust breeds namely CSR18, CSR19, CSR46, CSR47, 8HT, 5HT and two temperature and disease tolerant breeds CSR50 and CSR51 in accordance with the race maintenance technology.
Results/Recommendations :For all the robust breeds, the batches showing higher survival at high temperature and high humidity were kept as the criteria for the selection of the batches par with bench mark values. The performance of the breeds is in conformity with the original breeds characteristics.
Source of Information : Annual Report: 2005-2006
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance of bivoltine silkworm races (AIB-3294)-Maintenance of thin denier bivoltine breeds
Personnel :Kalpana GV, Basavaraja HK
Project Period :2004-2006
Objectives :To maintain thin denier breeds like JPN7 and JPN8, inter-batch crossing, by adopting single cocoon assessment and mono cocoon reeling methods.
Results/Recommendations :Both the breeds exhibited marginal differences for the expression of majority of the metric traits including filament length and denier h between replications. The performance of the breeds is in conformity with the original breed characteristics for all the quantitative traits and for longer filament length and less denier in particular.
Source of Information : Annual Report: 2005-2006
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance of bivoltine silkworm races (AIB-3294)-Maintenance of sex-limited breeds.
Personnel :Joge PG, Basavaraja HK
Project Period :2004-2006
Objectives :To rear the sex-limited breeds namely, CSR3 and CSR12 and the cocoon colour sex limited breeds namely CSR2 (SL) and CSR8 in accordance with the race maintenance technology.
Results/Recommendations :During the course of maintenance of sex limited breeds, the batches expressing higher survival in females with cocoon weight, shell weight and cocoon shell percentage on par with bench mark values were selected. Performance of the breeds is in conformity with the original breeds characteristics.
Source of Information : Annual Report: 2005-2006
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Maintenance of bivoltine silkworm races (AIB-3294)-Evaluation of basic stocks for post cocoon parameters.
Personnel :Nanjegowda B, Mal Reddy N
Project Period :2004-2006
Objectives :To assess the post cocoon parameters of fifty reelable cocoons from all productive, robust and sex-limited breeds.
Results/Recommendations :The important post cocoon parameters such as filament length, raw silk percentage, reelability, denier and neatness were assessed. The productive breeds expressed higher raw silk percentage and neatness when compared with robust and sex limited breeds.
Source of Information : Annual Report: 2005-2006
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution of hardy polyvoltine breeds/hybrids (AIB-3188)-Evolution of robust polyvoltine breeds/hybrids/Evolution of polyvoltine breeds/hybrids tolerant to high temperature.
Personnel :Raghavendra Rao D, Ravindra Singh, Kariappa BK, Bhanuprakash Raj
Project Period :2004-2006
Objectives :To evolve polyvoltine breeds/hybrids tolerant to high temperature.
Results/Recommendations :Five breeds viz., ND1, ND2, ND3, ND4 and ND5 were developed. Out of 36 hybrids evaluated ND5 x CSR17 was found promising. In-house testing of the new hybrid recorded an average yield of 74 kg/100 dfls as against 62 kg/100 dfls in control hybrid PM x CSR2.
Source of Information : Annual Report: 2005-2006
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evolution and evaluation of productive silkworm breeds with high survival using polyvoltine donors employing amylase marker assisted selection-Development of robust breeding lines of CSR2 and CSR4 using polyvoltine donors employing amylase enzyme marker assisted selection.
Personnel :Ashwath SK, Sharmila KK, Basavaraja HK
Project Period :2004-2006
Objectives :To develop robust breeding lines of CSR2 and CSR4 by employing the amylase marker assisted selection for transferring the high activity amylase genes from the polyvoltines into the genetic background of CSR2 and CSR4.
Results/Recommendations :The breeding lines were developed using he polyvoltine Donor Parents (DPs) with ‘4 band’/’5 band’ amylase types (PM, Nistari, C-Nichi, Diazo, Sarupat and Moria) and the Recurrent Parents (RPs), namely, CSR2 and CSR4, with ‘Null’ type of cathodic amylase. In each breeding line, upto BC6, 50 male progeny were individually screened by amylase assay and the larvae with DP type of amylase only were selected and back crossed with their respective RP female. During amylase assay, the ‘4 band/5 band’ type can be identified by dark and red colour (positive) while the ‘null’ type will be of light yellow colour. After BC6, the progeny of both sexes were screened and those with the DP type of amylase were selfed to raise the BC6S1 generation and similarly, BC6S2 generation were produced. Subsequently, test cross progeny (BC6S2 x RP) were raised and screened to identify beds homozygous for the DP type of amylase.
During the period, screening and selection has been completed upto the following generations. Homozygous families introgressed with the high activity amylase genes from their respective DPs were identified in the four oval lines of CSR2 (2C, 2D, 2S and 2M) and two dumbbell lines of CSR4 (4P and 4D).
Source of Information : Annual Report: 2005-2006
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Test verification of newly developed silkworm breeds and their hybrids (AIB-3276)-Raising of parental seed cocoons of polyvoltine breeds and bivoltine sex-limited breeds.
Personnel :Raghavedra Rao D, Ravindra Singh
Project Period :2004-2005
Objectives :To evaluate the newly developed sex limited multivoltine breed BL67(SL) with sex limited larval marking and CSR2(SL).
Results/Recommendations :Five trails were conducted and the breed BL67(L) showed pupation rate of 86.89, cocoon weight 1.218 g, shell weight 21.4 cg and shell ratio of 17.6%, whereas CSR2(SL) showed pupation rate of 87.8, cocoon weight 1.502, shell weight, 33.7 cg and shell ratio 22.4%. Seed cocoons generated were utilized for the preparation of F1 hybrids.
Source of Information : Annual Report: 2004-2005
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore
Project Title :Evaluation of selected mulberry and silkworm genetic Resources for specific hot spot-Evaluation of promising multivoltine silkworm genetic resources under high temperature and low humidity conditions. (RSRS, Charamarajanagar)
Personnel :Gururaj R, Kumaresan P
Project Period :2004-2006
Objectives :To evaluate the selected promising multivoltine silkworm germplasm accessions under high temperature and low humidity conditions and to screen the abiotic stress tolerant strains for utilization in the breeding to evolve season specific/region specific breed.
Results/Recommendations :Two trails were conducted with 10 multivoltine germplasm accessions keeping two control i.e., Pure Mysore and Nistari. The data indicated that all the new multivoltine races showed shorter larval duration.
Source of Information : Annual Report: 2005-2006
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