S. Hima Bindu*, L. Prasanthi1, V. Lakshmi Narayana Reddy2 and P. Latha3
Department of Genetics and Plant Breeding, S.V. Agricultural College, Tirupati.
1Director of Research, RARS, Tirupati
2Department of Molecular Biology and Biotechnology, S.V. Agricultural College, Tirupati
3Department of Crop Physiology, RARS, Tirupati
Email: himabindusingamreddy@gmail.com
Received-02.12.2021, Revised-17.12.2021, Accepted-26.12.2021
Abstract: 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 among genotypes for all yield, physiological, leaf morphological and biochemical attributing characters. D2 analysis grouped 50 genotypes into 6 clusters. Cluster II was 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 that most diverse clusters were 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). Leaf hairiness and number of pods per plant together contributed 81.63 % for divergence. To include the genotypes in the hybridization programmes for the improvement of pigeonpea, the characters with maximum contribution towards divergence and the performance of genotypes should be considered.
Keywords: Cluster analysis, Genetic diversity, Pigeonpea
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