Genetic Divergence Studies in Dolichos Bean (Lablab purpureus L.) Genotypes

Author: Syeda Nabeela Thasneem, M. Sreenivas, K. Nagaraju, P. Saidaiah and S.R. Pandravada

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Abstract

In the current investigation, genotypes of the dolichos bean (Lablab purpureus L.) were examined for genetic diversity. Using randomized block design (RBD), the investigation was conducted on 45 genotypes of dolichos bean, with two replications for sixteen characters. Tocher’s method was used to group 45 genotypes into nine clusters by treating the estimated D2 values as the square of the generalized distance. This grouping of genotypes into clusters resulted in the formation of nine clusters. The inter cluster distance recorded was minimum between cluster I and V indicating narrow genetic diversity, whereas maximum distance recorded between clusters VI and VII indicating wider genetic diversity between these two groups. Highest contribution towards divergence in this regard was put forth by reducing sugars, total sugars, protein content, days to 50% flowering, number of pods per plant, seed length, 100-seed fresh weight, days to first harvest, Pod yield per plant, pod width, vine length, number of primary branches per plant and pod length. In contrast, the remaining traits viz., number of seeds per pod, 100-seed dry weight and seed width did not contribute to the total divergence as there is no much variation in these traits

Keywords

Lablab purpureus, genetic diversity, percentage contribution.

Conclusion

The utmost importance may be given for highly divergent clusters for further selection of genotypes for hybridization programmes. Selection of parents from the diverse clusters for hybridization programme would help in achieving novel recombinants

References

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How to cite this article

Syeda Nabeela Thasneem, M. Sreenivas, K. Nagaraju, P. Saidaiah and S.R. Pandravada (2024). Genetic Divergence Studies in Dolichos Bean (Lablab purpureus L.) Genotypes . Biological Forum – An International Journal, 16(2): 160-165.