Department of Plant Breeding, Haryana Agricultural University, Hissar, 125 004, India
A quantitative assessment of genetic diversity for a set of ten quantitative characters related to productivity and survival was undertaken in twenty-nine genotypes of pigeon pea in two environments utilizing multivariate analysis. The investigations brought out the fact that environmental conditions exert considerable impact on the clustering pattern in different environments. Causes of variation in clustering pattern in different environments such as differential gene expression and presence of genotype-environment interaction have been discussed. Need to conduct such studies under multiple environmental conditions has been emphasized. Plant height followed by pod length and days to flower contributed maximum to genetic divergence. The crosses between genotypes from diverse groups such as T 17 and P 6102 which are expected to give high heterotic response, would be desirable.
