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   <subfield code="a">Genetic structure of farmer-managed varieties in clonally-propagated crops</subfield>
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   <subfield code="c">[N. Scarcelli, S. Tostain, Y. Vigouroux, V. Luong, M. Baco, C. Agbangla, O. Daïnou, J. Pham]</subfield>
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   <subfield code="a">The relative role of sexual reproduction and mutation in shaping the diversity of clonally propagated crops is largely unknown. We analyzed the genetic diversity of yam—a vegetatively-propagated crop—to gain insight into how these two factors shape its diversity in relation with farmers' classifications. Using 15 microsatellite loci, we analyzed 485 samples of 10 different yam varieties. We identified 33 different genotypes organized in lineages supported by high bootstrap values. We computed the probability that these genotypes appeared by sexual reproduction or mutation within and between each lineage. This allowed us to interpret each lineage as a product of sexual reproduction that has evolved by mutation. Moreover, we clearly noted a similarity between the genetic structure and farmers' classifications. Each variety could thus be interpreted as being the product of sexual reproduction having evolved by mutation. This highly structured diversity of farmer-managed varieties has consequences for the preservation of yam diversity.</subfield>
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   <subfield code="a">Sexual reproduction</subfield>
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   <subfield code="a">Genetic diversity</subfield>
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   <subfield code="u">Institut de Recherche pour le Développement (IRD), Equipe DYNADIV, UMR Diversité Adaptation Développement des Plantes (DIADE), 911 Avenue Agropolis, BP 64501, 34394, Montpellier Cedex 5, France</subfield>
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