Genetic Divergence Analysis in Vegetable cowpea (Vigna unguiculata subsp. unguiculata [L.]) Genotypes
Siva Kumar Vavilapalli1
1. Department of Horticulture, Dr. Y.S.R. Horticultural University, Tadepalligudem, West Godavari- 534101, A.P., India
2. Department of Olericulture, Kerala Agricultural University, College of Agriculture, Vellayani-695522, Trivandrum, Kerala, India
Legume Genomics and Genetics, 2014, Vol. 5, No. 2 doi: 10.5376/lgg.2014.05.0002
Received: 12 Jan., 2014 Accepted: 14 Mar., 2014 Published: 14 Jun., 2014
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Preferred citation for this article:
Vavilapalli et al., 2014, Genetic Divergence Analysis in Vegetable Cowpea (Vigna unguiculata subsp. unguiculata [L.]) Genotypes, Legume Genomics and Genetics, Vol.5, No.2, 4-6 (doi: 10.5376/lgg.2014.05.0002)
In order to assess the divergence among 22 cowpea genotypes, mahalanobis D2 statistics was applied. The analysis of variance revealed significant differences among the genotypes for all the traits. The 22 genotypes were grouped into 6 clusters, where clusters I was the largest, containing eleven genotypes followed by the clusters III (5 genotypes) and cluster II with three genotypes. The inter cluster distance was maximum between cluster III and VI followed by cluster III and V. Based on inter cluster distance and per se performance of genotypes, the entries viz., VU 1, VU 2, VU6, VU 8 and VU 21 were selected, which could be intercrossed to recover good recombinants and desirable segregants. The pod yield per plant contributed maximum divergence (66.23%) which was followed by pod weight (20.78%) and plant height (8.23%).
D2 statistics; Genetic diversity; Vegetable cowpea; Vigna unguiculata