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EMERGENT LIFE SCIENCES RESEARCH - Vol 7, Issue 1, Published on 30, June 2021

Pages: 1-6
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Deciphering combining ability and gene action study in elite genotypes of sesame (Sesamum indicum L.) using diallel mating design

Author: Ravinder Kumar, Jagdish. A. Patel, Parthsinh M. Rahevar, Ramesh M. Patel

Category: Research Article


To study the nature of gene action and to isolate better parents for the breeding program; combining ability for important parameters was examined in sesame. Seven diverse parents of sesame and their twenty-one F1s (half dialle1) were grown in Kharif 2019, in a randomized complete block design with three replications. Method-2, Model-I of Griffing method was used to analyze combining ability and gene action. Variances due to general combining ability (GCA) and specific combining ability (SCA) for all the traits were highly significant indicating the importance of both additive and non-additive gene actions for the inheritance of all the characters except days to maturity where the additive type of gene action is more important than non-additive type. Connotation among GCA effects and mean performance of the parents proposed that the performance per se could be a good indicator of its ability to transmit the desired traits to its off-springs. The hybrids, GT 03 x AT 307, AT 413 x AT 307, and GT 03 x AT 345 were found superior hybrids for days to flowering, number of capsules per plant, 1000 seed weight, and oil content. AT 413 x AT 307 hybrid having best per se performance for seed yield per plant.

Keywords: gene action, GCA, half- diallel, SCA, variance