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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2018: 95.39
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(3): 2616-2624
DOI: https://doi.org/10.20546/ijcmas.2018.703.302


Genetic Divergence Studies in Cowpea [Vigna unguiculata (L.) Walp.] Germplasm using Mahalanobis D2 Analysis
Om Vir Singh*, Neelam Shekhawat, Kartar Singh and R. Gowthami
National Bureau of Plant Genetic Resources, Regional Station, Jodhpur-342 003, India
*Corresponding author
Abstract:

Thirty-eight accessions of cowpea were evaluated for nine quantitative characters to estimate the genetic diversity existing among them by using Mahalanobis D2 statistics during kharif2013 (E1) and Kharif 2014(E2). The genotypes were grouped into ten clusters in E1 and into five clusters in E2 environment. In E1 environment, the cluster strength varied from single genotype (Cluster III, IV, V VI, VIII, IX and X) to 16 genotypes (Cluster II), while in E2 environment, it varied from single genotype (Cluster III, IV and V) to 19 genotypes (cluster I). Clusters VII and X had highest inter-cluster distance in E1 and cluster II and III had highest inter-cluster distance in E2 environment. The maximum mean value for seed yield per plant, number of pods per plant and number of clusters per plant was showed by genotypes of clusters VII in E1 environment and by genotypes of cluster IV for the traits number of seeds per pod, pod length and plant height in E2 environment. On the basis of inter-cluster distances, cluster VII and X in E1 environment and cluster II and III in E2 environment were found to be most divergent. Cluster VII had the genotype with the highest mean value for number of seed yield per plant, number of pods per plant and number of clusters per plant in E1 environment, while cluster I had the genotypes which showed maximum mean value for seed yield per plant, number of pods per plant, peduncle length, and number of clusters per plant in E2 environment. Therefore, it was concluded that these clusters and their genotypes could be intercrossed in order to achieve more variability.


Keywords: Cowpea, Cluster, D2 statistics, Genetic Diversity
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How to cite this article:

Om Vir Singh, Neelam Shekhawat, Kartar Singh and Gowthami, R. 2018. Genetic Divergence Studies in Cowpea [Vigna unguiculata (L.) Walp.] Germplasm using Mahalanobis D2 Analysis.Int.J.Curr.Microbiol.App.Sci. 7(3): 2616-2624. doi: https://doi.org/10.20546/ijcmas.2018.703.302