Parental Selection, Combining Ability Effects and Gene Action for Yield and Earliness in Blackgram [Vigna mungo (L.) Hepper]

Author: A. Kavitha Reddy, D. M. Reddy, Lakshminarayana, R. Vemireddy, P. Sudhakar and B. V. Bhaskara Reddy

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Abstract

Combining ability studies were carried out in blackgram comprising of six diverse parents and their 15 F1 crosses generated through diallel mating design for twelve yield, yield attributing traits along with earliness. The results indicated that both additive and non-additive gene actions played a major role in the inheritance of the traits. Among the parents, TBG-104 and LBG-752 were found to be good general combiners for yield attributing characters, TU-40 was the best choice for earliness and these parents could be exploited for producing desirable recombinants in the segregating generations for yield and earliness. The crosses LBG-752 × TBG-104, LBG-752 × PU-31, LBG-752 × TU-40, TU-40 × TBG-104 and IPU-2-43 × TBG-104 were found to be the best combinations for improvement of yield as evident from their mean performances and sca effects. The crosses TU-40 × TBG-104 and IPU-2-43 × TBG-104 were the best combinations for early flowering. By and large, among all the crosses LBG-75

Keywords

Blackgram, combining ability, gene action, yield, yield components, earliness

Conclusion

Based on per se and gca effects it could be concluded that the parents viz., TBG-104, LBG-752, TU-40 and IPU-2-43 were the best general combiners for yield and yield attributing traits. The parent TU-40 was the best general combiner for earliness. The crosses viz., LBG-752 × TBG-104, LBG-752 × PU-31, LBG-752 × TU-40, TU-40 × TBG-104 and IPU-2-43 × TBG-104 were found superior and could be exploited in future breeding programmes to isolate desirable segregants for yield and maturity in black gram. While selecting early maturing lines, it is crucial to seek balance between maturity and yield, so that there is least compromise on yield. In this lane, the cross LBG-752 × TBG-104 could be considered as the best one that may throw early maturing and high yielding segregants. Breeding methods like modified recurrent selection or repeated crossing in segregating generations could be useful for the exploitation of additive and non additive gene actions in all the crosses.

References

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How to cite this article

Reddy, A.K., Reddy, D.M., Lakshminarayana, Vemireddy, R., Sudhakar, P. and Reddy, B.V.B. (2021). Parental Selection, Combining Ability Effects and Gene Action for Yield and Earliness in Blackgram [Vigna mungo (L.) Hepper]. Biological Forum – An Inter