Genetic structure and mating system of wild cowpea populations in West Africa
<p>Abstract</p> <p>Background</p> <p>Cowpea is a highly inbred crop. It is part of a crop-weed complex, whose origin and dynamics is unknown, which is distributed across the African continent. This study examined outcrossing rates and genetic structures in 35 wild cowpe...
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| Format: | Article |
| Language: | English |
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BMC
2012-07-01
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| Series: | BMC Plant Biology |
| Online Access: | http://www.biomedcentral.com/1471-2229/12/113 |
| _version_ | 1811311114458234880 |
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| author | Kouam Eric B Pasquet Remy S Campagne Pascal Tignegre Jean-Baptiste Thoen Kevin Gaudin Remi Ouedraogo Jeremy T Salifu Abdulai B Muluvi Geoffrey M Gepts Paul |
| author_facet | Kouam Eric B Pasquet Remy S Campagne Pascal Tignegre Jean-Baptiste Thoen Kevin Gaudin Remi Ouedraogo Jeremy T Salifu Abdulai B Muluvi Geoffrey M Gepts Paul |
| author_sort | Kouam Eric B |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>Cowpea is a highly inbred crop. It is part of a crop-weed complex, whose origin and dynamics is unknown, which is distributed across the African continent. This study examined outcrossing rates and genetic structures in 35 wild cowpea (<it>Vigna unguiculata ssp. unguiculata var. spontanea</it>) populations from West Africa, using 21 isozyme loci, 9 of them showing polymorphism.</p> <p>Results</p> <p>Outcrossing rates ranged from 1% to 9.5% (mean 3.4%), which classifies the wild cowpea breeding system as primarily selfing, though rare outcrossing events were detected in each population studied. Furthermore, the analyses of both the genetic structure of populations and the relationships between the wild and domesticated groups suggest possibilities of gene flow that are corroborated by field observations.</p> <p>Conclusions</p> <p>As expected in a predominantly inbred breeding system, wild cowpea shows high levels of genetic differentiation and low levels of genetic diversity within populations. Gene flow from domesticated to wild cowpea does occur, although the lack of strong genetic swamping and modified seed morphology in the wild populations suggest that these introgressions should be rare.</p> |
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| format | Article |
| id | doaj.art-a31405cd2e7a48349ae40fb57f6642b2 |
| institution | Directory Open Access Journal |
| issn | 1471-2229 |
| language | English |
| last_indexed | 2024-04-13T10:12:12Z |
| publishDate | 2012-07-01 |
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| series | BMC Plant Biology |
| spelling | doaj.art-a31405cd2e7a48349ae40fb57f6642b22022-12-22T02:50:52ZengBMCBMC Plant Biology1471-22292012-07-0112111310.1186/1471-2229-12-113Genetic structure and mating system of wild cowpea populations in West AfricaKouam Eric BPasquet Remy SCampagne PascalTignegre Jean-BaptisteThoen KevinGaudin RemiOuedraogo Jeremy TSalifu Abdulai BMuluvi Geoffrey MGepts Paul<p>Abstract</p> <p>Background</p> <p>Cowpea is a highly inbred crop. It is part of a crop-weed complex, whose origin and dynamics is unknown, which is distributed across the African continent. This study examined outcrossing rates and genetic structures in 35 wild cowpea (<it>Vigna unguiculata ssp. unguiculata var. spontanea</it>) populations from West Africa, using 21 isozyme loci, 9 of them showing polymorphism.</p> <p>Results</p> <p>Outcrossing rates ranged from 1% to 9.5% (mean 3.4%), which classifies the wild cowpea breeding system as primarily selfing, though rare outcrossing events were detected in each population studied. Furthermore, the analyses of both the genetic structure of populations and the relationships between the wild and domesticated groups suggest possibilities of gene flow that are corroborated by field observations.</p> <p>Conclusions</p> <p>As expected in a predominantly inbred breeding system, wild cowpea shows high levels of genetic differentiation and low levels of genetic diversity within populations. Gene flow from domesticated to wild cowpea does occur, although the lack of strong genetic swamping and modified seed morphology in the wild populations suggest that these introgressions should be rare.</p>http://www.biomedcentral.com/1471-2229/12/113 |
| spellingShingle | Kouam Eric B Pasquet Remy S Campagne Pascal Tignegre Jean-Baptiste Thoen Kevin Gaudin Remi Ouedraogo Jeremy T Salifu Abdulai B Muluvi Geoffrey M Gepts Paul Genetic structure and mating system of wild cowpea populations in West Africa BMC Plant Biology |
| title | Genetic structure and mating system of wild cowpea populations in West Africa |
| title_full | Genetic structure and mating system of wild cowpea populations in West Africa |
| title_fullStr | Genetic structure and mating system of wild cowpea populations in West Africa |
| title_full_unstemmed | Genetic structure and mating system of wild cowpea populations in West Africa |
| title_short | Genetic structure and mating system of wild cowpea populations in West Africa |
| title_sort | genetic structure and mating system of wild cowpea populations in west africa |
| url | http://www.biomedcentral.com/1471-2229/12/113 |
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