GENETIC DIVERSITY STUDIES IN COWPEA (Vigna unguiculata L.Walp)

B. NANDINI PRIYA YADAV¹*, D. RAJASEKHAR², V. BLESSY³, B. YADAV^4
1Department of Genetics and Plant Breeding, Naini Institute of Agriculture, Sam Higginbottom University of Agriculture Technology and Sciences, Prayagraj, 211007, India
²Department of Genetics and Plant Breeding, Naini Institute of Agriculture, Sam Higginbottom University of Agriculture Technology and Sciences, Prayagraj, 211007, India
³Department of Genetics and Plant Breeding, Naini Institute of Agriculture, Sam Higginbottom University of Agriculture Technology and Sciences, Prayagraj, 211007, India
⁴Department of Genetics and Plant Breeding, Naini Institute of Agriculture, Sam Higginbottom University of Agriculture Technology and Sciences, Prayagraj, 211007, India
* Corresponding Author : nandiniagrico@gmail.com

Received : 23-07-2020     Accepted : 13-08-2020     Published : 15-08-2020
Volume : 12     Issue : 15       Pages : 10118 - 10120
Int J Agr Sci 12.15 (2020):10118-10120

Keywords : Cowpea, D2 Statistics, Genetic Diversity and cluster
Academic Editor : Dr R. L. Moharana
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to ICAR-Indian Institute of Vegetable Research, Varanasi, 231304, Uttar Pradesh. Authors are also thankful to Department of Genetics and Plant Breeding, Naini Institute of Agriculture, Sam Higginbottom University of Agriculture Technology and Sciences, Prayagraj, 211007, India
Author Contribution : All authors equally contributed

The present experiment was carried on at the Field Experimentation Centre, Department of Genetics and Plant Breeding, Sam Higginbottom University of Agriculture, Technology and Sciences, Allahabad during Kharif 2016 in Randomized Block Design with three replications. The study was undertaken on the 30 cowpea genotypes along with one check (Pant lobia-5) to study the genetic variability, correlation and genetic divergence. Analysis of variance showed highly significant differences among (29+1check) cowpea genotypes for 13 quantitative characters studied. Genetic diversity estimated in 30 cowpea genotypes using Mahalanobis’s D2 statistic showed that thirty genotypes were grouped into six clusters by Non- Hierarchical Euclidean cluster analysis. Cluster III was largest comprising of eleven genotypes followed by Cluster I with seven genotypes. The maximum inter-cluster distance was observed between cluster II and cluster IV. The maximum intra-cluster distance was observed in cluster V. Cluster VI showed maximum cluster mean value for seed yield per plant followed by biological yield/plant, days to 50% pod setting and days to maturity. The highest contribution in the manifestation of genetic divergence was exhibited by biological yield followed by days to maturity, seed yield per plant.

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