Cheryl D. Quinton

Publications and Presentations

Ph.D. Thesis

Quinton CD. 2005. Genetic improvement of Atlantic salmon for New Brunswick aquaculture. Ph.D. Thesis, University of Guelph. 

Advisor: Dr. Ian McMillan, Centre for Genetic Improvement of Livestock, Department of Animal and Poultry Science, University of Guelph, Guelph, Canada.

Full thesis: http://sites.google.com/site/cherylquinton/Cheryl-D-Quinton/downloads

Abstract

Atlantic salmon producers in New Brunswick wish to develop a strain characterised by fast growth, good carcass quality, and low grilse incidence. Genetic improvement strategies also need to be developed for new management practices wherein broodstock are reared in freshwater (FW) facilities, while market stocks are reared in seawater (SW) net pens.

Genetic parameters of body size, flesh quality (colour, astaxanthin, canthaxanthin, fat, and moisture), and age at sexual maturation (ASM) were estimated from data collected from full-sib families reared by the Atlantic Salmon Broodstock Development Program under commercial conditions. Most traits exhibited moderate heritability (h2) and therefore should show good response to selection, except for ASM which showed low h2. Genetic correlations (rG) indicated that selection to increase HWT will cause indirect increased flesh colour and pigmentation response, and undesirable increased flesh fat content. Most FW weights had positive rG with HWT, and so could be used as indicators of HWT in a selection program. However, 1y weight and HWT had a negative rG, therefore selecting on early weight may cause lower HWT. Negative rG between FW weight and SW ASM suggested that selection on FW weights may cause higher market stock grilse incidence. Relationships between body size and ASM differed between environments, and estimates of rG between ASM in FW and SW varied widely. FW ASM may be a different trait from SW ASM. An appropriately-weighted selection index should be therefore be used to increase HWT while decreasing flesh fat content and market stock grilse incidence.

Computer simulations were used to predict effects of 10 generations of selection based on broodstock weight phenotype, estimated breeding values (EBV) for HWT calculated from best linear unbiased prediction (BLUP), and grilse culling, on broodstock weight, HWT, grilse rate, inbreeding, and economic returns for a range of genetic correlations. Selection on BLUP EBV combined with either no culling or culling grilse individuals resulted in higher HWT and lower grilse incidence, and thus higher revenues. However, selection on BLUP EBVs also caused faster inbreeding accumulation, therefore some restrictions on selection and mating should be implemented in practice.

 

M.Sc. Thesis

Quinton CD. 2001. Growth rate and spawning time in diallel crosses of three strains of rainbow trout. M.Sc. Thesis, University of Guelph. 

Advisor: Dr. Ian McMillan, Centre for Genetic Improvement of Livestock, Department of Animal and Poultry Science, University of Guelph, Guelph, Canada.

Full Thesishttp://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ58370.pdf

Abstract

Factors controlling individual pre-maturation instantaneous growth rate and female spawning date were examined in two complete sets of diallel crosses of three strains of rainbow trout (Oncorhynchus mykiss). Hybrids generally performed intermediately to pure strains. For growth rate, the trend among dam strains was opposite to the trend among sire strains. Hybrids grew more like their sire's strain and spawned more like their dam's strain.  Males grew faster than females for all strains. Early-maturing individuals weighed more prior to maturation, but grew at the same rate as later-maturing individuals.  Spawn date was highly repeatable over seasons. Genetic parameters and breeding values were estimated for 2-year old weight, and 3- and 4-year old spawn dates. All traits had high heritabilities. Negative phenotypic correlations and zero genetic correlations occurred between weight and spawn dates. Recommendations were made for a breeding program that simultaneously increases growth and delays spawning time.

 

Journal Publications

  •  Kause A, Quinton CD, Ruohonen K, Koskela J. 2009. Genetic potential for the regulation of variability in body lipid and protein content of European whitefish (Coregonus lavaretus). British Journal of Nutrition 101:1444-1451. http://dx.doi.org/10.1017/S0007114508091265
  • Vehviläinen H, Kause A, Quinton C, Koskinen H, Paananen T. 2008. Survival of the currently fittest: Genetics of rainbow trout survival across time and space. Genetics 180:507-516. http://dx.doi.org/10.1534/genetics.108.089896
  • Quinton CD, Kause A, Ruohonen K, Koskela J. 2007. Genetic relationships of feed utilization and body composition traits in European whitefish and implications for selective breeding in fishmeal- and soybean meal-based diets. Journal of Animal Science 85:3198-3208. http://dx.doi.org/10.2527/jas.2006-792
  • Quinton CD, Kause A, Koskela J, Ritola O. 2007. Breeding salmonids for feed efficiency in current fishmeal and future plant-based diet environments. Genetics Selection Evolution 39:431-446. http://dx.doi.org/10.1051/gse:2007013
  • Quinton CD, McMillan I, Glebe B. 2005. Development of an Atlantic salmon genetic improvement program: Genetic parameters of harvest body weight and carcass quality traits estimated with animal models. Proceedings of Genetics in Aquaculture VIII, Puerto Varas, Chile, November 9-15 2003. Aquaculture 247:211-217. http://dx.doi.org/10.1016/j.aquaculture.2005.02.030
  • Quinton CD, McKay LR, McMillan I. 2004. Strain and maturation effects on female spawning time in diallel crosses of three strains of rainbow trout. Aquaculture 234:99-110. http://dx.doi.org/10.1016/j.aquaculture.2004.01.016

Conference Presentations and Publications

  • Kause A, Quinton C, Ritola O, Ruohonen K, & Koskela J. 2008. Breeding salmonids for high performance in current fishmeal and future plant-protein based diet environments. Skretting Australasian Aquaculture 2008 Congress, Brisbane, Australia, August 4-6 2008.
  • Quinton CD, Kause A, Koskela J, Ritola O, Ruohonen K. Genetics of feed efficiency and body composition in European whitefish fed fishmeal and soybean meal based diets. Fish Breeders’ Round Table, Ålesund, Norway, June 11-13 2007. 
  • Quinton CD, Kause A, Koskela J. 2006. Impact of a novel plant-protein based diet on a European whitefish breeding program: genetic analysis of feed utilisation traits. Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Brazil, August 13-18 2006, CD-ROM communication no. 09-10. http://www.wcgalp8.org.br/wcgalp8/articles/paper/9_489-2115.pdf 
  • Quinton CD, Kause A, Koskela J. 2006. A switch from fish- to plant-protein based feeds will not harm the current breeding program for European whitefish: Evidence from genetic analysis of feed utilisation traits. Maataloustieteen Päivät, Helsinki, Finland, January 11-12 2006. http://www.smts.fi/esit06/1602.pdf
  • Quinton CD. Genetic improvement strategies for the Atlantic Salmon Broodstock Development Program. Atlantic Aquaculture Exposition, Conference & Fair, St. Andrews, Canada, June 11-14 2003.
  • Glebe B, Harmon P, Quinton CD, 2003. Early and ongoing studies on maturation of cage-reared Atlantic salmon in the Bay of Fundy. Proceedings of the 2nd St. Andrews Biological Station Aquaculture Workshop: Early Maturation of Atlantic Salmon, St. Andrews, Canada, March 6 2003. Bulletin of the Aquaculture Association of Canada 103(1):13-22.
  • Quinton CD, Moghadasi SM, McKay LR, McMillan, I. 2002. Genetic parameters of body weight, female spawning date, and age at sexual maturation in rainbow trout. Proceedings of the 7th World Congress on Genetics Applied to Livestock Production, Montpellier, France, August 19-23 2002, CD-ROM communication no. 06-02. http://cgil.uoguelph.ca/pub/7WCGALP/Quinton.pdf
  • Quinton CD, McMillan I. Quantitative aspects of salmonid breeding. Finfish Broodstock Management and Development Workshop, St. Andrews, Canada, October 17-19 2001. Quantitativeaspectsofsalmonidbreedin.pdf [Unpublished manuscript]
  • Quinton CD, McKay LR, McMillan I. 2002. Genetic parameters and selection methods to improve two-year weight and spawning time in rainbow trout (Oncorhynchus mykiss). Proceedings of Aquaculture Canada 2001, Halifax, Canada, May 6-9 2001. Aquaculture Association of Canada Special Publication 5:10-12.
  • Quinton CD, McKay LR, McMillan I. 2002. Analysis of growth and spawning time in diallel crosses of three strains of rainbow trout (Oncorhynchus mykiss). Proceedings of Genetics in Aquaculture VII, Townsville, Australia, July 15-22 2000. Aquaculture 204:240. [Poster abstract]

Other Publications


25-11-2009

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