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Understanding the recent colonization history of a plant pathogenic fungus using population genetic tools and approximate bayesian computation

hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
hal.structure.identifierCentre de Coopération Internationale en Recherche Agronomique pour le Développement [Cirad]
dc.contributor.authorBARRES, Benoît
hal.structure.identifierCentre de Coopération Internationale en Recherche Agronomique pour le Développement [Cirad]
dc.contributor.authorCARLIER, J.
hal.structure.identifierAmélioration génétique et adaptation des plantes méditerranéennes et tropicales [UMR AGAP]
dc.contributor.authorSEGUIN, Marc
hal.structure.identifierCentre de Coopération Internationale en Recherche Agronomique pour le Développement [Cirad]
dc.contributor.authorFENOUILLET, C.
hal.structure.identifierCentre de Coopération Internationale en Recherche Agronomique pour le Développement [Cirad]
dc.contributor.authorCILAS, C.
hal.structure.identifierCentre de Coopération Internationale en Recherche Agronomique pour le Développement [Cirad]
dc.contributor.authorRAVIGNÉ, V.
dc.date.issued2012
dc.identifier.issn0018-067X
dc.description.abstractEnUnderstanding the processes by which new diseases are introduced in previously healthy areas is of major interest in elaborating prevention and management policies, as well as in understanding the dynamics of pathogen diversity at large spatial scale. In this study, we aimed to decipher the dispersal processes that have led to the emergence of the plant pathogenic fungus Microcyclus ulei, which is responsible for the South American Leaf Blight (SALB). This fungus has devastated rubber tree plantations across Latin America since the beginning of the twentieth century. As only imprecise historical information is available, the study of population evolutionary history based on population genetics appeared most appropriate. The distribution of genetic diversity in a continental sampling of four countries (Brazil, Ecuador, Guatemala and French Guiana) was studied using a set of 16 microsatellite markers developed specifically for this purpose. A very strong genetic structure was found (F-st = 0.70), demonstrating that there has been no regular gene flow between Latin American M. ulei populations. Strong bottlenecks probably occurred at the foundation of each population. The most likely scenario of colonization identified by the Approximate Bayesian Computation (ABC) method implemented in DIYABC suggested two independent sources from the Amazonian endemic area. The Brazilian, Ecuadorian and Guatemalan populations might stem from serial introductions through human-mediated movement of infected plant material from an unsampled source population, whereas the French Guiana population seems to have arisen from an independent colonization event through spore dispersal.
dc.description.sponsorshipEtude de Méthodes Inférentielles et Logiciels pour l'Evolution - ANR-09-BLAN-0145
dc.description.sponsorshipComprendre les émergences de maladies fongiques de plantes : vers une estimation des risques liés aux changements globaux - ANR-07-BDIV-0003
dc.language.isoen
dc.publisherNature Publishing Group
dc.subjectmicrocyclus ulei
dc.subjectSALB
dc.subjectmicrosatellite
dc.subject.enpopulation history
dc.subject.enemergent infectious disease
dc.subject.enABC
dc.title.enUnderstanding the recent colonization history of a plant pathogenic fungus using population genetic tools and approximate bayesian computation
dc.typeArticle de revue
dc.identifier.doi10.1038/hdy.2012.37
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalHeredity
bordeaux.page269-279
bordeaux.volume109
bordeaux.issue5
bordeaux.peerReviewedoui
hal.identifierhal-02644961
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02644961v1
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