Studies on Genetic Divergence among Greengram (Vigna radiata L.) Germplasm Accessions

Authors

  • V. Sridhar Dept. of Genetics and Plant Breeding, ARS, Kampasagar, PJTSAU, Telangana (508 207), India https://orcid.org/0000-0001-8371-0419
  • S. Srinivasa Rao Dept. of Agronomy, Agricultural College, Palem, PJTSAU, Telangana (509 215), India
  • A. Sriram Dept. of Genetics and Plant Breeding, RARS, Palem PJTSAU, Telangana (509 215), India
  • G.Venu Gopal Dept. of Soil Science and Agricultural Chemistry, ARS, Madhira, PJTSAU, Telangana (507 203), India

Keywords:

D2 statistics, genetic divergence, germplasm, principal component analysis

Abstract

The present study was conducted at the Agricultural Research Station, Madhira, Telangana, India during rabi (October−December), 2017–18 to evaluate 39 diverse greengram germplasm accessions. The experiment was laid out in RBD replicated twice for 8 quantitative traits to study the nature and magnitude of genetic diversity among the accessions by multivariate analysis such as cluster analysis with D2 Statistics and principal component analysis. 3 principal components viz., PC I, PC II and PC III contributed about 85.45% of total variance for the genotypes studied. The genotypes were grouped into 8 distinct clusters of which cluster I is the largest with a maximum number (16) of genotypes followed by cluster II and cluster VI with 6 genotypes each. Genotypes IC-436735, IC-261261, WGG-42 representing mono genotypic cluster signifies presence of diversity for creating variability through hybridization. Highest intra cluster distance of 47.27 was recorded for cluster VI and highest inter-cluster distance of 252.46 was observed between cluster IV and VIII. Data on cluster means for various traits showed that the highest mean value for number of clustersplant-1, number of pods plant-1 and seed yield plant-1 was recorded by cluster VII. Percent contribution revealed that plant height contributed the most (32.11%) followed by seed yield plant-1 (21.86%) for total genetic divergence. The genotypes in the clusters with maximum inter cluster distance may be used as potential parents for developing high yielding greengram cultivars.

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Published

2022-08-26

How to Cite

1.
Sridhar V, Rao SS, Sriram A, Gopal G. Studies on Genetic Divergence among Greengram (Vigna radiata L.) Germplasm Accessions. IJBSM [Internet]. 2022 Aug. 26 [cited 2024 May 24];13(Aug, 8):838-44. Available from: https://ojs.pphouse.org/index.php/IJBSM/article/view/4287

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