S. HIMA BINDU*, L. PRASANTHI, V. LAKSHMI NARAYANA REDDY AND P. LATHA
Department of Genetics and Plant Breeding, S.V. Agricultural College, ANGRAU, Tirupati-517502. Andhra Pradesh, India
A set of 50 pigeonpea genotypes were evaluated during kharif season 2019-20 at Regional Agricultural Research Station (RARS), Tirupati, Andhra Pradesh to assess the genetic diversity. The study revealed wide range of genetic diversity among genotypes for all yield, physiological, leaf morphological and biochemical attributing characters. D2 analysis grouped 50 genotypes into 6 clusters. Cluster II was the largest consisting of 29 genotypes, followed by Cluster I containing 13 genotypes, Clusters III and IV had 3 genotypes each and the Cluster V and VI was solitary. The inter-cluster D2 values indicated most diverse Clusters III and IV (4187.56) followed by Clusters II and IV (3686.56).The highest intra-cluster distance was observed in Cluster III (273.66) followed by cluster II (234.81). On the basis of cluster mean values, Cluster III was superior for number of primary branches per plant, number of pods per plant and seed yield per plant. Cluster IV was superior for 100 seed weight, leaf thickness and phenol content and resistance to sterility mosaic disease. Leaf hairiness and number of pods per plant together contributed 81.63 per cent for divergence, hence these traits were emphasized for selection of genotypes for hybridization.
Cluster analysis, genetic diversity, pigeonpea