Assessment of genetic variation and inheritance mode of some metric traits in cotton (Gossypium hirsutum L.)
2007
Ali, M.A. (University of Agriculture, Faisalabad (Pakistan). Dept. of Plant Breeding and Genetics) | Khan, I.A. (University of Agriculture, Faisalabad (Pakistan). Dept. of Plant Breeding and Genetics)
Five cotton cultivars were crossed in a complete diallel fashion. The resulting 20 hybrids and their five parents were studied for genetic variation involved in the inheritance of different plant traits during 2005-07. Differences were found to be highly significant (P less than 0.01) for all the characters i.e., number of monopodia, number of sympodia, boll weight, lint percentage and seed cotton yield. All the traits exhibited additive gene action with partial dominance. Epistasis was absent in the phenotypic expression of these characters. Estimates of narrow sense heritability were high for number of sympodia (0.74), boll weight (0.87), lint percentage (0.71) and seed cotton yield (0.86), while moderate for number of monopodia (0.66) with considerable effects. Additive gene action and high estimates of heritability advocated the utilization of selection breeding for improving these traits. The results concluded that selection based on indi vidual plants would give rapid progress for the betterment of the traits under study.
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