Genetic Variation and Extent of Genetic Diversity in Urdbean [Vigna mungo (L.) Hepper]

Author: Barsha Rani Barik, Devraj Lenka, Arjun Kumar Agarwal, Ankita Mishra, Gyanisha Nayak and Swapan Kumar Tripathy

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Abstract

Urdbean is the third most important pulse crop in India. But, no significant breakthrough has been achieved for enhancing its productivity primarily due to narrow genetic variability. Therefore, a set of urdbean germplasm comprising 58 urdbean genotypes were characterized for genetic variability. Analysis of variance revealed highly significant differences among the genotypes for ten yield and yield attributing traits indicating the presence of considerable genetic variation in the experimental material. The GCV was lower than PCV for all traits, however, there was narrow difference in PCV and GCV, indicating the effect of environment in lesser frequency. Characters viz., plant height, number of branches/plant, number of clusters/plant, number of pods/plant and seed yield/plant showed high heritability in conjunction with high genetic advance, showing effects of additive gene action and providing ample scope for selection in segregating generations. Further, D2 statistics grouped the f

Keywords

Blackgram, genetic variation, D2 statistics, genetic diversity.

Conclusion

The current investigation on variability and genetic diversity study in 58 urdbean genotypes revealed that there was ample variation in the material used for study. There were narrow differences between PCV and GCV in days to 50% flowering, days to maturity and plant height indicating lesser environmental influence on these characters. The fifty-eight genotypes were grouped into eight clusters based on D2 statistics and non-hierarchical Euclidean cluster analysis implying presence of high degree of genetic diversity among them. Highest inter-cluster distance was observed between cluster VI and VII, whereas lowest in between cluster IV and VI. So, selection of genotypes from diversely related clusters with respect to maximum inter-cluster distance can give rise to better transgressive recombinants in the follow-up generations.

References

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How to cite this article

Barik, B.R., Lenka, D., Agarwal, A.K., Mishra, A., Nayak, G. and Tripathy, S.K. (2021). Genetic Variation and Extent of Genetic Diversity in Urdbean [Vigna mungo (L.) Hepper]. Biological Forum – An International Journal, 13(3a): 556-561.