Combining ability analysis for yield and its attributes in Blackgram (Vigna mungo (L.) Hepper)
Abstract
Hybridization in Line x Tester mating design was conducted with 11 MYMV susceptible lines and three resistant testers in blackgram (Vigna mungo (L.) Hepper) to understand the nature of gene action, combining ability of the parents (gca) and to assess the potential for the exploitation of heterosis (sca) in hybrids. Data on nine quantitative characters viz.,days to 50 per cent flowering, plant height (cm), number of branches per plant, number of clusters per plant, number of pods per plant, number of seeds per pod, hundred seed weight (g) and seed yield per plant (g) were collected on 33 hybrids and their 11 parents. Among the genotypes, PU 31, LBG 645, ADT 3, CO 6 and LBG 709 recorded relatively high per se performance and gca effects for majority of seed yield attributing traits. The hybrid, LBG 709 x PU 31 followed by CO 6 x PU 31 and LBG 645 x VBN (Bg) 6 exhibited significant high per se and sca for most of the traits viz., number of branches per plant, number of clusters per plant, number of pods per plant, pod length and seed yield per plant .The crosses involving the parents, LBG 645 x PU 31 and ADT 3 x PU 31 recorded significant gca and non-significant sca effect for most of the characters inferring that these crosses would produce superior recombinants for seed yield.
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