Genetic diversity analysis for yield parameters in yellow pericarp sorghum (Sorghum bicolor L.) Moench genotypes

Abstract

Forty ICRISAT genotypes of grain sorghum yellow pericarp having different geographical origins were evaluated at ARS, Madhira for diversity study using D2 analysis. The analysis of variance showed highly significant differences among the accessions for all the characters. Principal component analysis showed that PC I, PC II and PC III, contributed 83.41, 9.06 and 3.80 % of total variance. Among the five clusters, Cluster 1 is the largest and had the maximum number (32) of genotypes followed by cluster 2 with 4 genotypes, cluster 3 with 2 genotypes and cluster 4 and cluster 5 with single genotype each. Percent contribution towards genetic divergence showed that plant height contributed the most (57.82%) followed by leaf length (22.82%), grain yield per plant (7.82%).