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Journal of Biological Sciences
Year: 2001  |  Volume: 1  |  Issue: 2  |  Page No.: 67 - 70

Study Pertaining to the Estimation of Gene Action Controlling Yield and Related Traits in Upland Cotton

Amir Shakeel, Iftikhar Ahmad Khan and Faqir Muhammad Azhar    

Abstract: A 5 x 5 diallel cross experiment was conducted to have genetic information on yield and yield components. The results of joint regression analysis indicated that data for all the characters were fit for simple additive-dominance model. Vr/Wr graph showed that overdominance type of gene action was operative for number of bolls per plants, yield of seed cotton and lint percentage while additive type of gene action with partial dominance for boll weight. CIM-443 showed good general combining ability (gca) for number of bolls per plant, yield of seed cotton and boll weight. DPL- 7740-424 had also better general combining ability for lint percentage. The crosses CIM-443 x Co-2-1, CIM-443 x Coker-307, CIM-443 x DPL-7740-424 and DPL-7740-424 x B-682 showed best specific combining ability for number of bolls per plant, yield of seed cotton, boll weight and lint percentage respectively.

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