Combining Ability and Gene Action Studies for Seed Yield and Contributing Characters in Cowpea (Vigna unguiculata)
2014
Mukati, A.K. | Patel, S.R. | Patil, S.S. | Jadhav, B.D.
Combining ability analysis revealed that GCA variance was highly significant for all the characters, while SCA variance were highly significant for all the characters except for harvest index. The significance of both GCA and SCA variance for most of the characters indicated that both additive as well as non-additive types of gene actions were involved in the inheritance of these traits. The characters, which had higher mean squares of SCA than GCA indicated preponderance of non-additive genetic variance for these traits. The ratio of estimates of variances of GCA/SCA is less than unity indicated the preponderance of dominance, additive x additive and dominance x dominance types of gene action for all the characters under study. The general combining ability effects revealed that parent GC-4 was the good general combiner for allthe characters except for plant height, pod length, seed per pod and harvest index and also parent GC-502-2 was good general combiner for all the traits except for days to 50% flowering, days to maturity, branches per plant, pod length, seed per pod and protein content. However, the best general combiners for seed yield per plant were GC 4, GC 502-2 and Pusa Komal. The result of SCA effects showed that among all twenty eight hybrids, the crosses GC 3 x Anand Cowpea-1, Subhra x GC 4, GC 502-2 x Pusa Komal, GC-4 x Pusa Komal and GC 502-2 x GC 4 showed the highest SCA effect for seed yield per plant and involved poor x average and good x good combining parents.
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