Indexing

Understanding the Genetic Distances among various Genotypes of Black Gram (Vigna mungo (L.) Hepper) using D2 Statistics

Author: K. Lakshmi Prasanna, D. Ratna Babu, J. Sateesh Babu and D. Ramesh

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Abstract

Fifty black gram genotypes were evaluated to assess the genetic diversity and to identify desired cross combinations for development of superior hybrids or transgressive segregants. Based on Mahalanobis D2 statistics, the fifty black gram genotypes were grouped into twelve clusters. High range of variation was observed for trait contribution to the total diversity and pods per plant contributed maximum followed by seeds per pod and plant height. The fifty genotypes were grouped into twelve discrete clusters, among which cluster II was the largest with twenty genotypes followed by cluster I with fifteen genotypes and cluster III with six genotypes and remaining clusters viz., IV, V, VI, VII, VIII, IX, X, XI and XII were all solitary. The maximum per se performance for grain yield was recorded in cluster III followed by cluster IX, XI and XII and the Mahalanobis D2 distances between clusters III and clusters XI, XII & IX are 87.04, 72.94 and 43.24, respectively, indicating that these three monogenotypic clusters (XI, XII & IX) with high per se were having considerable divergence with cluster III.

Keywords

Black gram, Genetic distance, Genetic divergence, D2, Vigna mungo

Conclusion

The current investigation on genetic diversity study in 50 black gram genotypes revealed that there was ample variation in the material under study. The fifty genotypes were grouped in twelve clusters based on D2 statistics implying high degree of genetic diversity among them. Highest inter-cluster distance was observed between cluster VI and XII, where as lowest in between cluster XI and XII. So, selection of genotypes from diversely related clusters with respect to maximum inter-cluster distance can give rise to better transgressive segregants in following generations.

References

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How to cite this article

K. Lakshmi Prasanna, D. Ratna Babu, J. Sateesh Babu and D. Ramesh (2023). Understanding the Genetic Distances Among various Genotypes of Black Gram (Vigna mungo (L.) Hepper) using D2 Statistics. Biological Forum – An International Journal, 15(3): 655-659.