Scarcelli Nora auteur aut IRD Tostain Serge auteur aut IRD Vigouroux Yves auteur aut IRD Luong V. auteur aut IRD Baco M. N. auteur aut IRD Agbangla C. auteur aut IRD Dainou O. auteur aut IRD Pham Jean-Louis auteur aut IRD text journalArticle eng text/pdf born digital access 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. specialized Sexual reproduction Asexual reproduction Mutation Genetic diversity Vegetatively-propagated crop Dioscorea 076 139 8 1055-1064 2011 0016-6707 https://www.documentation.ird.fr/hor/fdi:010053870 10.1007/s10709-011-9607-8 0016-6707 [F B010053870] https://www.documentation.ird.fr/hor/fdi:010053870 https://www.documentation.ird.fr/intranet/publi/2011/10/010053870.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2011-11-07 2017-08-23 fdi:010053870 fre