Combining ability and heterobeltiotic estimates in a diallel cross of cotton (Gossypium hirsutum L.)
1999
Hassan, G. (Agricultural Research Inst., D.I. Khan (Pakistan)) | Mahmood, G. | Khan, N.U. | Razzaq, A.
A four parent complete diallel cross experiment including reciprocals was undertaken to estimate the nature of gene action, combining ability and heterobeltiotic effects. Preponderance of non- additive genetic effects was ascertained for boll number, seed cotton yield, plant height, lint percentage, seed index and staple length, whereas boll weight and lint index were addictively controlled. Heterobeltiosis was estimated almost for all the traits, but it was more pronounced for seed cotton yield. Superiority in yield was associated with boll number rather than boll weight. Parents A.U-59 and B-284 were evaluated as the best general combiners. The cross combination B-284 X A.U-59 was the best for seed cotton yield. Feasibility of commercial exploitation of heterosis is also discussed.
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