Analysis of genetic diversity in grain amaranth (Amaranthus spp.)

L. Venkatesh; Niranjana Murthy; S. D. Nehru

L. Venkatesh All India Coordinated Research Network on Underutilized Crops, University of Agricultural Sciences, GKVK, Bangalore 560 065
Niranjana Murthy All India Coordinated Research Network on Underutilized Crops, University of Agricultural Sciences, GKVK, Bangalore 560 065
S. D. Nehru All India Coordinated Research Network on Underutilized Crops, University of Agricultural Sciences, GKVK, Bangalore 560 065

Keywords: Grain amaranth, genetic divergence, non hierarchical Euclidian cluster

Abstract

The genetic divergence in 100 genotypes and germplasm lines of grain amaranth (Amaranthus spp.) was assessed by using non-hierarchical Euclidean cluster analysis.The genotypes were grouped into 15 distinct clusters revealing wide diversity in the experimental material. Cluster XV was largest with 18 followed by cluster XIV with 15 and cluster VIII with 11 genotypes, while cluster VI was solitary. Clustering pattern of genotypes showed lack of any relationship between geographic origin and genetic diversity. Intra cluster values ranged from 0.00 to 23.81 and cluster VII was the most diverse group. The inter cluster values ranged from 22.30 to 133.55. Maximum divergence was noticed between clusters VI and XIII (133.55) followed by clusters I and IV (132.74). The diverse clusters derived could be used in hybridization programme to develop high yielding grain amaranth varieties.