Your browser doesn't support javascript.
loading
Genetic diversity and population structure of a mini-core subset from the world cowpea (Vigna unguiculata (L.) Walp.) germplasm collection.
Fatokun, Christian; Girma, Gezahegn; Abberton, Michael; Gedil, Melaku; Unachukwu, Nnanna; Oyatomi, Olaniyi; Yusuf, Muyideen; Rabbi, Ismail; Boukar, Ousmane.
Afiliação
  • Fatokun C; International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria. c.fatokun@cgiar.org.
  • Girma G; Botany and Plant Pathology Department, Purdue University, West Lafayette, IN, 47907-2054, USA.
  • Abberton M; International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria.
  • Gedil M; International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria.
  • Unachukwu N; International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria.
  • Oyatomi O; International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria.
  • Yusuf M; International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria.
  • Rabbi I; International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria.
  • Boukar O; International Institute of Tropical Agriculture (IITA), Kano, Nigeria.
Sci Rep ; 8(1): 16035, 2018 10 30.
Article em En | MEDLINE | ID: mdl-30375510
The International Institute of Tropical Agriculture maintains the world's largest collection of cowpea germplasm of over 15,000 accessions. A sub-set of 298 lines from the loosely composed mini core collection of 370 landraces were genotyped based on genotyping by sequencing (GBS). Ward's minimum variance hierarchical cluster analysis, model-based ancestry analysis and discriminant analysis of principal component (DAPC) were carried out on this sub-set. Three clusters were identified by the different clustering methods. Principal component analysis further supported the three clusters especially when accessions are scattered along the axes of the first two principal components. The first two principal components explained a total of 22.30% of the variation. Cluster one comprises 115 accessions from the largest number of countries and has the highest gene diversity, heterozygosity and polymorphic information content (PIC) values. Cluster two is made up of 102 accessions, 90 percent of which are from West and Central Africa. Analysis of molecular variance shows that the most variation is among accessions and lowest among clusters. No cluster is made exclusively of accessions from a single country. Based on SNP markers, the sub set of cowpea mini core germplasm collection used in this study encompasses the diversity in the crop.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Variação Genética / Vigna / Genética Populacional Idioma: En Ano de publicação: 2018 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Variação Genética / Vigna / Genética Populacional Idioma: En Ano de publicação: 2018 Tipo de documento: Article