Determining Sources of Diversity in Cultivated and Wild <Emphasis Type="Italic">Lablab purpureus</Emphasis> Related to Provenance of Germplasm by using Amplified Fragment Length Polymorphism |
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Authors: | Email author" target="_blank">Brigitte L?MaassEmail author Ramni H?Jamnadass Jean?Hanson Bruce C?Pengelly |
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Institution: | 1.Institute for Crop and Animal Production in the Tropics,Georg-August-University,G?ttingen,Germany;2.International Livestock Research Institute (ILRI),Addis Ababa,Ethiopia;3.ILRI,Nairobi,Kenya;4.CSIRO Sustainable Ecosystems,Indooroopilly,Australia |
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Abstract: | To improve understanding of diversity of Lablab purpureus and establish relationships among 103 germplasm accessions collected from diverse geographic origins, amplified fragment
length polymorphism markers were used. Four primer sets selected out of 16 produced 289 clear, repeatable polymorphisms. UPGMA
analysis of similarity data clustered the accessions according to their subspecific taxonomic organization, i.e., subsp. purpureus and subsp. uncinatus, as well as to cultivated and wild forms. The well-represented landraces from Africa and Asia, belonging predominantly to
subsp. purpureus, displayed moderate genetic diversity. Wild forms from Africa showed far greater levels of diversity that would justify taxonomic
re-assessment of the wild subsp. uncinatus. The molecular analysis identified forms that were collected in the wild in India but were genetically placed intermediate
between wild and cultivated forms. As these plant types did not exist among the African accessions, it is suggested that they
might represent escapes from early attempts of domestication. These results support the suggested pathway of domestication
and distribution of L. purpureus from Africa to Asia. Additional members to a previously published core collection of the species are proposed. |
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Keywords: | AFLP Core collection Crop domestication Genetic diversity Lablab purpureus Molecular markers |
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