Genetic relationships among subspecies of Vigna unguiculata (L.) Walp. based on allozyme variation

  title={Genetic relationships among subspecies of Vigna unguiculata (L.) Walp. based on allozyme variation},
  author={Remy S. Pasquet},
  journal={Theoretical and Applied Genetics},
  • R. Pasquet
  • Published 11 May 1999
  • Biology
  • Theoretical and Applied Genetics
Abstract The cowpea [Vigna unguiculata (L.) Walp.] is a morphologically and genetically variable species composed of wild perennial, wild annual, and cultivated forms that are mainly used for edible seeds and pods. In this study, genetic variation in 199 germplasm accessions of wild and cultivated cowpea was evaluated using an allozyme analysis. The results from this survey showed that wild cowpea exhibits genetic variation perfectly fitted with the existing morphological classification. The… 

Genetic diversity in cowpea [Vigna unguiculata (L.) Walp.] as revealed by RAPD markers

Using RAPD analysis, RAPD data confirmed the single domestication hypothesis, the gap between wild and domesticated cowpea, and the widespread introgression phenomena, which still suggests two consecutive bottlenecks within domesticatedCowpea evolution.

Allozyme diversity of cultivated cowpea Vigna unguiculata (L.) Walp.

  • R. Pasquet
  • Biology
    Theoretical and Applied Genetics
  • 2000
The data presented suggest that Northeast Africa could be a possible center of domestication of V. unguiculata and appear to be less diverse than their putative primitive cultivar-group progenitors.

AFLP analysis of the phenetic organization and genetic diversity of Vigna unguiculata L. Walp. reveals extensive gene flow between wild and domesticated types

The superiority of the AFLP technique over isozymes resided in its ability to uncover variation both within domesticated and wild cowpea, and should be a powerful tool once additional wild material becomes available.

Cowpea [Vigna unguiculata (L.) Walp.] maternal lineages, chloroplast captures, and wild cowpea evolution

The present study of chloroplast diversity through restriction fragment length polymorphism confirms the different groups, as well as the split between savannah subspecies and forest subspecies, and proves that three subspecies are of hybrid origin.

Genetic Diversity and Population Structure Analyses of Wild Relatives and Cultivated Cowpea (Vigna unguiculata (L.) Walp.) from Senegal Using Simple Sequence Repeat Markers

Cowpea ( Vigna unguiculata (L.)) is an important crop for food security in Senegal; therefore, understanding the genetic diversity of local germplasm is relevant for crop improvement and genetic

Genetic diversity and relationship between wild and cultivated cowpea [Vigna unguiculata (L.) Walp.] as assessed by allozyme markers

Abstract In Cameroon, cowpea plays an important role in traditional agroecosystems. Genetic variation in wild and cultivated cowpea in Cameroon has not yet been documented. Allozyme markers because

Assessment of variation in the agronomic traits of wild cowpea (Vigna unguiculata (L.) Walp.) subspecies under a rainforest agro-ecology in Nigeria

It is confirmed that wildcowpea subspecies have the potential to enhance cowpea gene pool and may be a useful source of genetic variation needed for the development of improvedCowpea varieties for resource poor farmers at a relatively low expense.

Genetic characterization of Malawian cowpea (Vigna unguiculata (L.) Walp) landraces: diversity and gene flow among accessions

The analysis of molecularvariance revealed that within-region ortypes (among accessions) variation accounted for 96% of the total molecularvariability, and this high within-accessionvariability is being sustained by anuncontrolled gene flow among populations.

Genetic diversity of cowpea [Vigna unguiculata (L.) Walp.] in four West African and USA breeding programs as determined by AFLP analysis

US and Asian breeding programs could increase genetic variability in their programs substantially by incorporating germ plasm from West Africa, while national programs in West Africa should consider introgression of Asian germplasm and germplasma from other parts of Africa into their programs to ensure long-term gains from selection.

Assessment of genetic diversity in Ethiopian cowpea [Vigna unguiculata (L.) Walp.] germplasm using simple sequence repeat markers

Three well-characterized molecular markers (SSR1, C42-2B, and 61RM2) for race specific resistance to Striga gesnerioides in the cowpea cultivar B301 were used to evaluate the accessions for their potential for use in genetic improvement against this pest.



Isozyme diversity in the cowpea species complex

The authors' data indicate introgression from wild to cultivated must be very rare, and wild cowpea may, therefore, be the progenitor of the cultivatedcowpea.

Taxonomy and ecology of vigna unguiculata (Leguminosae-papilionoideae) in south-central Africa

The present paper seeks to revise the infraspecific taxonomy of Vigna unguiculata within South-Central Africa and to comment upon its morphological and ecological diversity.


The very low level of chloroplast DNA diversity found in cultivated accessions relative to wild cowpea suggests that 1) the domesticated form was derived from a narrow selection of the wild germplasm and 2)chloroplast gene flow between wild and cultivated types has been very limited.

Allozyme Variability in the Tepary Bean, Phaseolus acutifolius A. Gray

The tepary bean (Phaseolus acutifolius) is the object of renewed interest because it possesses some interesting agronomic attributes such as tolerance to drought and salinity. In order to gain a

Evolutionary relationships in the Sativa group of Oryza based on isozyme data

  • G. Sécond
  • Biology, Medicine
    Génétique, sélection, évolution
  • 1985
The wild and weedy species of the Sativa group of Oryza were studied for their isozyme polymorphism at 24 loci for 181 plants, each taken in a different population, the total representing the entire

Genetic Diversity in Cultivated Common Bean: I. Allozymes

Confirmation that cultivated common bean (Phaseolus vulgaris L.) resulted from multiple domestications in Mesoamerica and in Andean South America was sought by analyzing patterns of diversity at nine polymorphic allozyme loci, all unlinked to the phaseolin locus.

A new subspecies of Vigna unguiculata ( Leguminosae : Papilionoideae )

Study of herbarium material of wild Vigna unguiculata (L.) Walp. has revealed specimens from Ethiopia with very large stipules; the long calyx lobes place them in the "mensensis group". All have an

Two new subspecies of Vigna unguiculata (L.) Walp. (Leguminosae: Papilionoideae)

Clitoria alba G. Don, Gen. Don; M. Liberato, Flora de S. Tome e Principe: 58 (1972).

Recent advances in cowpea breeding

Cowpea is an important grain legume throughout the tropics and subtropics, covering Asia, Africa, and Central and South America, as well as parts of southern Europe and the United States of America, and a range of varieties has been developed, combining diverse plant type and maturity with resistance to several diseases, insect pests, and parasitic weeds.