O Venkateswarlu, B Santhosh Kumar Naik and V Surekha devi

Fifteen F1 hybrids were produced in line x tester design with five lines and three 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. Among the genotypes, T9, LBG-20, IPU2-3 and MASH 1008 recorded significant positive GCA effects for seed yield. The hybrid, T-9X MASH1008, PU-31X MASH1008, PU-31X IPU-2-43 followed by LBG-20X PU-11-14 exhibited significant positive SCA for seed yield (kg/ha). The crosses recorded significant positive SCA effects for most of the characters inferring that these crosses would produce superior recombinants for seed yield.

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