Abstract
Cowpea (Vigna unguiculata (L.) Walp) is an important legume crop with immense potential for nutritional and food security, income generation, and livestock feed in Sub-Saharan Africa. The crop is highly tolerant to heat and drought stresses which makes it an extremely important crop for improving resilience in crop production in the face of climate change. This study was carried out to assess the genetic diversity and population structure of 90 cowpea accessions using single nucleotide polymorphism (SNP) markers. Out of 11,940 SNPs used, 5864 SNPs were polymorphic and maintained for genome diversity analysis. Polymorphic information content (PIC) values ranged from 0.22 to 0.32 with a mean value of 0.27. The model-based Bayesian STRUCTURE analysis classified 90 cowpea accessions into four subpopulations at K = 4, while the distance-based cluster analysis grouped the accessions into three distinct clusters. The analysis of molecular variance (AMOVA) revealed that 59% and 69% of the total molecular variation was attributed to among individual variation for model-based and distance-based populations, respectively, and 18% was attributed to within individual variations. Furthermore, the low heterozygosity among cowpea accessions and the high inbreeding coefficient observed in this study suggests that the accessions reached an acceptable level of homozygosity. This study would serve as a reference for future selection and breeding programs of cowpea with desirable traits and systematic conservation of these plant genetic resources.
Funder
National Research Foundation
Agricultural Research Council of South Africa
Subject
Plant Science,Ecology,Ecology, Evolution, Behavior and Systematics
Reference59 articles.
1. Cowpea;Singh;Broadening the Genetic Base of Grain Legumes,2014
2. Gepts PAFLP analysis of the phenetic organization genetic diversity of Vigna unguiculata, L. Walp. reveals extensive gene flow between wild and domesticated types;Coulibaly;Theor. Appl. Genet.,2002
3. Gbedevi, K.M., Boukar, O., Ishikawa, H., Abe, A., Ongom, P.O., Unachukwu, N., Rabbi, I., and Fatokun, C. (2021). Genetic diversity and population structure of cowpea [Vigna unguiculata (L.) Walp.] germplasm collected from Togo based on DArT markers. Genes, 12.
4. Cowpea (Vigna unguiculata L. walp.);Ehlers;Field Crops Res.,1997
5. Seo, E., Kim, K., Jun, T., Choi, J., Kim, S., Muñoz-Amatriaín, M., Sun, H., and Ha, B. (2020). Population structure and genetic diversity in Korean cowpea germplasm based on SNP markers. Plants, 9.
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