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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/5366

Title: Studies on the inheritance of seed quality traits in groundnut (Arachis Hypogaea L.)
Authors: Kabbia, Milton Kabba
Issue Date: 9-Dec-2013
Abstract: Development of groundnut genotypes with large seed size and seed weight and improved seed quality attracts consumers‘ immediate attention. Knowledge of the genetics system controlling expressions of these traits facilitates the choice of the most efficient breeding and selection procedure. A study of the nature and magnitude of gene effects in groundnut (Arachis hypogaea L.), utilizing three parameter additive-dominance model, where a confectionery variety (Oboshie) was crossed with two non confectionery high yielding varieties (Jenkaah and Nkosour). Six generations of parents, first filial and second filial generations, backcrosses 1 and 2 (P1, P2, F1, F2, B1 and B2) were studied for two quantitative traits (seed size and seed weight) in Oboshie x Jenkaah and Oboshie x Nkosour crosses. The study indicated that the additive-dominance model was adequate to explain the mode of inheritance of seed size in both crosses. The net additive gene effect contributed significantly (P ≤ 0.05) to the inheritance of seed size; therefore, suggesting that selection for improvement of seed size could be accomplished in the F2 generation in both crosses. The net dominance effect was positive indicating dominance towards the direction of the larger seed parent. Additive gene effects contributed significantly to the inheritance of seed weight per plant in Oboshie x Jenkaah cross, and magnitude of the net additive effect was higher than the dominance gene effect. Dominance value was positive indicating direction towards the heavier seed parent. The simple additive-dominance model was inadequate to explain the mode of inheritance of seed weight per plant for Oboshie x Nkosour cross, and therefore suggested the presence of non-allelic interaction in the inheritance of seed weight per plant. The result suggested that selection for seed weight per plant for Oboshie x Nkosour could be achieved through indirect selection for a component trait such as seed size than direct selection for seed weight itself. The additive genetic effects observed for both traits will enhance pure line breeding.
Description: A thesis submitted to the School of Graduate Studies, Kwame Nkrumah University of Science and Technology in partial fulfilment of the requirement for the award of Master of Science degree in Agronomy (Plant Breeding)- August-2013
URI: http://hdl.handle.net/123456789/5366
Appears in Collections:College of Agric and Natural Resources

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