title: Genetic Diversity and Population Structure of Cowpea (Vigna unguiculata L. Walp).
abstract: The genetic diversity of cowpea was analyzed, and the population structure was estimated in a diverse set of 768 cultivated cowpea genotypes from the USDA GRIN cowpea collection, originally collected from 56 countries. Genotyping by sequencing was used to discover single nucleotide polymorphism (SNP) in cowpea and the identified SNP alleles were used to estimate the level of genetic diversity, population structure, and phylogenetic relationships. The aim of this study was to detect the gene pool structure of cowpea and to determine its relationship between different regions and countries. Based on the model-based ancestry analysis, the phylogenetic tree, and the principal component analysis, three well-differentiated genetic populations were postulated from 768 worldwide cowpea genotypes. According to the phylogenetic analyses between each individual, region, and country, we may trace the accession from off-original, back to the two candidate original areas (West and East of Africa) to predict the migration and domestication history during the cowpea dispersal and development. To our knowledge, this is the first report of the analysis of the genetic variation and relationship between globally cultivated cowpea genotypes. The results will help curators, researchers, and breeders to understand, utilize, conserve, and manage the collection for more efficient contribution to international cowpea research.
authors: Department of Horticulture, University of Arkansas, Fayetteville, Arkansas, United States of America.|State Key Lab of Rice Biology, IAEA Collaborating Center, Zhejiang University, Hangzhou, China.
authors: Haizheng
authors: H
authors: Xiong
authors: Department of Horticulture, University of Arkansas, Fayetteville, Arkansas, United States of America.
authors: Ainong
authors: A
authors: Shi
authors: US Department of Agriculture, Agricultural Research Service (USDA-ARS), Salinas, California, United States of America.
authors: Beiquan
authors: B
authors: Mou
authors: Department of Horticulture, University of Arkansas, Fayetteville, Arkansas, United States of America.
authors: Jun
authors: J
authors: Qin
authors: Vegetable Research Center, University of Arkansas, Alma, Arkansas, United States of America.
authors: Dennis
authors: D
authors: Motes
authors: Department of Horticulture, University of Arkansas, Fayetteville, Arkansas, United States of America.
authors: Weiguo
authors: W
authors: Lu
authors: Department of Horticulture, University of Arkansas, Fayetteville, Arkansas, United States of America.
authors: Jianbing
authors: J
authors: Ma
authors: Department of Horticulture, University of Arkansas, Fayetteville, Arkansas, United States of America.
authors: Yuejin
authors: Y
authors: Weng
authors: Department of Horticulture, University of Arkansas, Fayetteville, Arkansas, United States of America.
authors: Wei
authors: W
authors: Yang
authors: State Key Lab of Rice Biology, IAEA Collaborating Center, Zhejiang University, Hangzhou, China.
authors: Dianxing
authors: D
authors: Wu
mesh_terms: D000349:Africa; D014644:Genetic Variation; D005828:Genetics, Population; D010802:Phylogeny; D020641:Polymorphism, Single Nucleotide; D000070658:Vigna / Q000235:genetics*