HETEROSIS, COMBINING ABILITY AND INBREEDING DEPRESSION FOR SEED YIELD AND ITS ATTRIBUTING TRAITS IN SESAME (Sesamum indicum L.) 3683
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Date
2023-06
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JAU,JUNAGADH
Abstract
The present investigation was undertaken with a view to examine the
manifestation of heterosis, inbreeding depression, combining ability and nature and
magnitude of gene action involved in the inheritance of seed yield and its components
characters viz., days to 50 per cent flowering, days to maturity, length of reproductive
stem, number of capsules per plant, number of branches per plant, plant height, length
of capsule, number of seeds per capsule, test weight, biological yield per plant,
harvest index and oil content. The experimental materials consisted of parents and
their 45 F1’s and 45 F2’s derived by crossing 10 diverse sesame genotypes (GT-3,
GT-4, GT-6, AT-338, AT-324, IC-132186, GT-10, T-11, GJT-5 and GTF-1) in a half diallel fashion were evaluated in Randomized Block Design (RBD) with three
replications during Kharif 2022 at Main Oilseeds Research Station, Junagadh
Agricultural University, Junagadh.
The results for analysis variance revealed that the mean square differences
among genotypes, parents, F1’s and F2’s were highly significant for all the studied
characters except days to maturity in parents. The mean square due to parents vs. F1’s
was significant for all the 13 characters except seed yield per plant and parents vs.
F2’s was also found significant for all the traits except days to maturity, length of
capsule, number of seeds per capsule and harvest index, respectively.