Vol. 10, Issue 8 (2021)

Author(s):
Sanjay Rathod, Maharudra Ghodke, Shivaji Mehetre and Hirakant Kalpande

Abstract:
Genetic information is estimated for yield and its component traits using full diallel analysis of 8 x 8 diverse parents of sesame. The combining ability analysis revealed that the genotype mean sum of the square were highly significant for all the traits. The t² test was non-significant which validated the use of simple additive dominance model for the traits viz., days to 50 per cent flowering, days to maturity, plant height, number of branches per plant, number of capsules per plant, length of capsule, 1000-seed weight and oil content. The D component was significant for all the traits excluding the traits viz., days to 50 per cent flowering, days to maturity, number of capsules per plant and seed yield per plant. The estimated components of H₁ and H₂ were significant for all the traits except days to maturity, 1000-seed weight and oil content disclosed the importance of additive and non-additive components. The unbalanced distribution of genes at the parents loci confirmed by the greater value of H₁ than H₂ and the ratio of H₂/4H₁ (<0.25) indicating dominance for all the traits except days to maturity, 1000-seed weight and oil content. The component F was significant for plant height, number of branches per plant and length of capsule. The Vr-Wr graphical analysis revealed the regression line intercepted Wr axis below the origin displayed over dominance for days to 50 per cent flowering, days to maturity, plant height, number of capsules per plant, length of capsule, number of seeds per capsule, 1000-seed weight, seed yield per plant and oil content. The regression line passed above the origin of Wr axis for number of branches per plant which indicated the presence of partial dominance.