Inferences from mitochondrial DNA patterns on the domestication history of alfalfa (Medicago sativa)
| Autor: | M. H. Muller, Jean-Marie Prosperi, Joëlle Ronfort, Sylvain Santoni |
|---|---|
| Přispěvatelé: | Diversité et génomes des plantes cultivées (UMR DGPC), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA) |
| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
0106 biological sciences
Crops Agricultural Species complex Mitochondrial DNA FLUX DE GENE Biology 010603 evolutionary biology 01 natural sciences DNA Mitochondrial Gene flow ESPECE CULTIVEE Genetics [SDV.BBM]Life Sciences [q-bio]/Biochemistry Molecular Biology Medicago sativa GENETIQUE VEGETALE Domestication Ecology Evolution Behavior and Systematics Polymorphism Genetic Geography Ecology food and beverages 15. Life on land HISTOIRE Phylogeography Genetics Population Evolutionary biology Restriction fragment length polymorphism GENETIQUE DES POPULATIONS Polymorphism Restriction Fragment Length 010606 plant biology & botany Demographic expansion |
| Zdroj: | Molecular Ecology Molecular Ecology, Wiley, 2003, 12, pp.2187-2199. ⟨10.1046/j.1365-294X.2003.01897.x⟩ |
| ISSN: | 0962-1083 1365-294X |
| DOI: | 10.1046/j.1365-294X.2003.01897.x⟩ |
| Popis: | The evolutionary history of a wild-cultivated complex is the outcome of different factors, among which are the domestication of the cultivated form, its geographical and demographic expansion, as well as gene flow between natural and cultivated populations. To clarify this history for alfalfa (Medicago sativa), we adopted a phylogeographical approach based on a sample of natural and cultivated populations of the M. sativa species complex. This sample was characterized for mtDNA variation through restriction fragment length polymorphisms. Twenty-two mitotypes were identified in the whole data set (155 individuals). In the wild pool from the presumed area of origin (Near East to Central Asia), the diversity was high but the absence of geographical differentiation hinders a more precise location of the centre of domestication. Within the cultivated alfalfa, the geographical structure suggests strongly the existence of at least two independent routes of dissemination of alfalfa from its centre of origin. In particular, original mitotypes detected in some regions suggest that wild populations not sampled in this study, and located outside the presumed area of domestication, may have contributed to the diversity of the cultivated pool. Finally, analysis of the mtDNA variation shows that natural populations collected in Spain constitute an endemic wild pool now introgressed partially by cultivated alfalfa. |
| Databáze: | OpenAIRE |
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