ABSTRACT

The present investigation was undertaken to estimate the nature and magnitude of gene action involved in controlling the traits imparting drought tolerant in post rainy season sorghum The investigation comprised of six generations (P1, P2, F1, F2, B1 and B2) of the cross RSV1098 x RSV458 for the traits associated with drought tolerant. The joint scaling test for almost all the characters was found highly significant in all the crosses, indicating inadequacy of additive-dominance model and presence of higher order interactions. The dominance (h) gene effects were found predominant along with dominance x dominance (l) interaction effects in the inheritance of traits viz., length of panical, harvest index, total above ground dry matter and grain yield. The parent RSV1098 was found superior in contributing traits viz., , length of panicle, harvest index, total above ground dry matter and grain yield per plant. Duplicate type of epistasis observed for almost all the traits associated with drought tolerant. Keywords: drought, generation mean analysis, rabi sorghum, epistasis, additive dominance model

https://ijbpas.com/pdf/2018/February/1517462024MS IJBPAS 2017 4310.pdf

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