Genetic diversity and population structure analysis of bambara groundnut (Vigna subterrenea L) landraces using DArT SNP markers

• DOI: 10.1371/journal.pone.0253600
• Publication Date: 2021-07-01T17:53:02Z
• Authors: Charles U. Uba; Happiness O. Oselebe; Abush A. Tesfaye; Wosene G. Abtew
• Keywords: Germ plasm; Genetic distance

Understanding the genetic structure and diversity of crops facilitates progress in plant breeding. A collection 270 bambara groundnut ( Vigna subterrenea L) landraces sourced from different geographical regions (Nigeria/Cameroon, West, Central, Southern East Africa) unknown origin (sourced United Kingdom) was used to assess diversity, relationship population using DArT SNP markers. The major allele frequency ranged 0.57 for 0.91 West Africa region. total gene (0.482) Shannon index (0.787) higher African accessions. distance between pairs varied 0.002 0.028 with similarity Nigeria/Cameroon-West accessions East-Southern analysis molecular variance (AMOVA) revealed 89% variation within population, 8% among 3% population. relatedness collections evaluated neighbor joining tree analysis, which grouped all geographic into three clusters. Three subgroups were identified ADMIXTURE model program confirmed by discriminant principal components (DAPC). These Africa, Nigeria/Cameroon that gave rise sub-population one, Central two, while three. In general, results analytical methods this study existence high level germplasm might be utilized future improvement groundnut. finding also provides new insight on will help conservation strategy management crop.