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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Relationships of Vigna unguiculata (L.) Walp., V. vexillata (L.) A. Rich, and species of section Vigna based on isozyme variation
Genetic Resources and Crop Evolution, Volume 43, No. 2, Year 1996
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Description
Isozyme variation in 25 accessions of wild and cultivated Vigna unguiculata, 49 accessions of seven wild species belonging to section Vigna, and 11 accessions of V. vexillata (subgenus Plectrotropis) was scored at 17 putative loci to assess genetic relationships within and among species. The wild species selected for this study are among those which carry important agronomical traits useful in cowpea (V unguiculata) breeding programs. Allelic frequencies were calculated and Nei's genetic distances were obtained. Low levels of intraspecific variation were observed for V. heterophylla, V. luteola and V. racemosa, whereas the other species showed a higher polymorphism. Vigna unguiculata possessed intraspecific genetic distances comparable to those previously found by other authors. Most of the isozyme variation was apportioned among species. Although V. luteola and V marina had an interspecific genetic distance resembling the range observed at intraspecific level, all the other species showed very high interspecific distances. Vigna unguiculata was relatively closer genetically to V. vexillata than to the species belonging to section Vigna. © 1996 Kluwer Academic Publishers.
Authors & Co-Authors
Sonnante, Gabriella
Italy, Rome
Consiglio Nazionale Delle Ricerche
Piergiovanni, A. R.
Italy, Rome
Consiglio Nazionale Delle Ricerche
Ng, Quat N.
Nigeria, Ibadan
International Institute of Tropical Agriculture
Perrino, Pietro
Italy, Rome
Consiglio Nazionale Delle Ricerche
Statistics
Citations: 16
Authors: 4
Affiliations: 2
Identifiers
Doi:
10.1007/BF00126759
ISSN:
09259864
Research Areas
Genetics And Genomics