Evolutionary history of almond tree domestication in the Mediterranean basin.
Détails
ID Serval
serval:BIB_518F08C4D8E8
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Evolutionary history of almond tree domestication in the Mediterranean basin.
Périodique
Molecular Ecology
ISSN
1365-294X (Electronic)
ISSN-L
0962-1083
Statut éditorial
Publié
Date de publication
2013
Peer-reviewed
Oui
Volume
22
Numéro
4
Pages
1092-1104
Langue
anglais
Résumé
Genetic diversity of contemporary domesticated species is shaped by both natural and human-driven processes. However, until now, little is known about how domestication has imprinted the variation of fruit tree species. In this study, we reconstruct the recent evolutionary history of the domesticated almond tree, Prunus dulcis, around the Mediterranean basin, using a combination of nuclear and chloroplast microsatellites [i.e. simple sequence repeat (SSRs)] to investigate patterns of genetic diversity. Whereas conservative chloroplast SSRs show a widespread haplotype and rare locally distributed variants, nuclear SSRs show a pattern of isolation by distance with clines of diversity from the East to the West of the Mediterranean basin, while Bayesian genetic clustering reveals a substantial longitudinal genetic structure. Both kinds of markers thus support a single domestication event, in the eastern side of the Mediterranean basin. In addition, model-based estimation of the timing of genetic divergence among those clusters is estimated sometime during the Holocene, a result that is compatible with human-mediated dispersal of almond tree out of its centre of origin. Still, the detection of region-specific alleles suggests that gene flow from relictual wild preglacial populations (in North Africa) or from wild counterparts (in the Near East) could account for a fraction of the diversity observed.
Mots-clé
fruit trees, genetic diversity, migration, phylogeography, population structure, Prunus dulcis
Pubmed
Web of science
Création de la notice
01/11/2012 23:27
Dernière modification de la notice
20/08/2019 14:07