Genetic diversity analysis of Indian mustard (Brassica juncea L.)

Abstract

Genetic divergence assessed in twenty genotypes of Indian mustard [Brassica juncea (L.) Czern & Coss.] using D2 statistics for eighteen characters enabled grouping of all the genotypes into five clusters. Seed yield/plant, biological yield/plant, 1000- seed weight, and harvest index were the major contributors for genetic diversity among the genotypes. Out of 5 clusters, cluster I and II was the largest comprising 8 genotypes followed by cluster V consisting of 2 genotypes, cluster III and IV with 1 genotype, respectively. The cluster I exhibited maximum intra- cluster distance (70.74), while maximum inter-cluster distance was observed between cluster V and IV (857.56).