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Viterllaria paradoxa Research
Viterllaria paradoxa Research
The full economic potentials of the Shea nut tree (Vitellania paradoxa) has not been realized in Ghana due to the difficulty involved in its domestication. The lack of a suitable vegetative propagation technique to address the long juvenile phase of the plant is the reason it is still a wild crop. Studies were conducted at the Cocoa Research Institute of Ghana (CRIG)
Substation-Bole to investigate the combined effects of etiolation, rooting media, the use of propagules (cutting and layers) of juvenile origin and varying IBA hormone concentration on root formation in sheanut tree. Results from the layering experiments indicated that light-grown shoots performed better than etiolated shoots in 4 year-old trees during the dry and rainy seasons. However, in field layering of mature fruit bearing trees the reverse was observed. Average rooting in layered shoots of cutback seedlings in the rainy season (40.8%) was significantly (p<0.05)
higher than layered shoots of cutback mature shea trees (27.9). Generally etiolation was also found to increase the levels of total sugars and phenols in shoots of 4 year-old seedlings and
mature fruit bearing trees but this increase did not enhance rooting. Results from cuttings experiments with varying concentration of IBA indicated that 3000ppm produced significantly (p<0.05) better rooting (57.5%) than 5000ppm (30%), 7000ppm (45.0%) and the control (7.5%). The levels of soluble sugars and total free phenols in the cutting were significantly (p<0.05) lower at the start of the experiment than at the end. Callus formation was significantly (p<0.05) high (35.0%) in the control (no IBA). Generally, callus formation decreased with increasing IBA concentration In rooting media experiment, rooting was significantly (p<0.05) higher in the rice husk medium (35.0%) than in palm fibre (18.3%), saw dust (14.1) and top soil (16.7%).
Domestication of Vitellaria paradoxa (Sheanut tree)final.pdfAJPS_2013082914445733.pdfef2de3e8cea8f656d370d0d0d27dfe618310.pdf
Shea trees from cuttings
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