Revealing nature of gene action of morpho-economic traits in sesame (sesamum indicum l.)

Mishra D.R.,Tripathy Swapan K., Mohanty. , Kartik Ch. Pradhan., K.R. Reshmi Raj., M.R. Mohanty., P.M. Mohapatra., Dash S. and Panda S

Considering the nature and magnitude of gene action, days to maturity, number of primary branches/plant and capsule breadth were largely controlled by additive gene action. Pedigree selection would be an appropriate method to have higher selection response for these traits. In contrast, magnitude of non-additive variance was invariably much higher than additive component of variance for period of flowering, number of capsules/plant, oil content and seed yield/plant for which heterosis breeding would be most effective. However, estimates of GCA and SCA were more or less equivalent in case of number of days to cessation of flowering and seeds/capsule which envisaged importance of both additive and non-additive components of variation. In this context, diallel selective mating along with recurrent selection would be useful for recovery of desirable homozygotes in later generations.

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