Genetic Divergence Studies in Yardlong Bean (Vigna ungiculata subsp sesquipedalis L.) Genotypes

Author: Mithun Kumar, M. Anjanappa, R.K. Ramachandra* and Meenakshi Sood

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Abstract

Characterization of germplasm is crucial for using and enhancing plant genetic resources in diverse breeding programmes, hence the field experiments were conducted at the Department of Vegetable Science, College of Horticulture, Kolar, Karnataka, India during 2020–21 with 45 genotypes of yardlong bean (Vigna ungiculata subsp. sesquipedalis L.). Genetic diversity among the genotypes was worked out using Mahalanobis D2 statistics. On the basis of genetic distance, these genotypes were broadly grouped into six clusters. Cluster I was the largest, consisting of 34 genotypes, while cluster III contained 6 genotypes, followed by cluster II, consisting of 2 genotypes, and clusters IV, V and VI, consisting of one genotype each. Among the different characters studied, pod yield per plant (27.98 %) contributed the most to the total genetic diversity among the genotypes, followed by 100 seed weight (14.60%), number of primary branches (10.91%), number of pods per plant (10.51%) and pod girth (8

Keywords

Yardlong bean, genetic diversity, clusters, hybridization.