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Threat to Asian wild apple trees posed by gene flow from domesticated apple trees and their pestified pathogens

hal.structure.identifierEcologie Systématique et Evolution [ESE]
hal.structure.identifierInstitut de Recherche en Horticulture et Semences [IRHS]
dc.contributor.authorFEURTEY, Alice
hal.structure.identifierInstitut de Recherche en Horticulture et Semences [IRHS]
dc.contributor.authorGUITTON, Ellen
hal.structure.identifierInstitut de Recherche en Horticulture et Semences [IRHS]
dc.contributor.authorDE GRACIA COQUEREL, Marie
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
hal.structure.identifierInstitut de Recherche en Horticulture et Semences [IRHS]
dc.contributor.authorDUVAUX, Ludovic
hal.structure.identifierNoble Research Institut
dc.contributor.authorSHILLER, Jason
hal.structure.identifierInstitut de Recherche en Horticulture et Semences [IRHS]
dc.contributor.authorBELLANGER, Marie‐noëlle
hal.structure.identifierInstitut de Recherche en Horticulture et Semences [IRHS]
dc.contributor.authorEXPERT, Pascale
hal.structure.identifierInstitut de Recherche en Horticulture et Semences [IRHS]
dc.contributor.authorSANNIER, Mélanie
hal.structure.identifierInstitut de Recherche en Horticulture et Semences [IRHS]
dc.contributor.authorCAFFIER, Valérie
hal.structure.identifierEcologie Systématique et Evolution [ESE]
dc.contributor.authorGIRAUD, Tatiana
hal.structure.identifierInstitut de Recherche en Horticulture et Semences [IRHS]
dc.contributor.authorLE CAM, Bruno
hal.structure.identifierInstitut de Recherche en Horticulture et Semences [IRHS]
dc.contributor.authorLEMAIRE, Christophe
dc.date.issued2020-10-08
dc.identifier.issn0962-1083
dc.description.abstractEnSecondary contact between crops and their wild relatives poses a threat to wild species, not only through gene flow between plants, but also through the dispersal of crop pathogens and genetic exchanges involving these pathogens, particularly those that have become more virulent by indirect selection on resistant crops, a phenomenon known as “pestification”. Joint analyses of wild and domesticated hosts and their pathogens are essential to address this issue, but such analyses remain rare. We used population genetics approaches, demographic inference and pathogenicity tests on host-pathogen pairs of wild or domesticated apple trees from Central Asia and their main fungal pathogen, Venturia inaequalis, which itself has differentiated agricultural and wild-type populations. We confirmed the occurrence of gene flow from cultivated (Malus domestica) to wild (Malus sieversii) apple trees in Asian forests, potentially threatening the persistence of Asian wild apple trees. Pathogenicity tests demonstrated the pestification of V. inaequalis, the agricultural-type population being more virulent on both wild and domesticated trees. SNP markers and the demographic modeling of pathogen populations revealed hybridization following secondary contact between agricultural and wild-type fungal populations, and dispersal of the agricultural-type pathogen population in wild forests, increasing the threat of disease in the wild apple species. We detected a SNP potentially involved in pathogen pestification, generating an early stop codon in a gene encoding a small secreted protein in the agricultural-type fungal population. Our findings, based on joint analyses of paired host and pathogen datasets, highlight the threat posed by cultivating a crop near its center of origin, in terms of pestified pathogen invasions in wild plant populations and introgression in the wild-type pathogen population.
dc.language.isoen
dc.publisherWiley
dc.subject.enavirulence gene
dc.subject.ensecondary contact
dc.subject.enMalus
dc.subject.enhybridization
dc.subject.encrop-to-wild gene flow
dc.subject.enapple
dc.subject.enVenturia
dc.title.enThreat to Asian wild apple trees posed by gene flow from domesticated apple trees and their pestified pathogens
dc.typeArticle de revue
dc.identifier.doi10.1111/mec.15677
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalMolecular Ecology
bordeaux.page4925-4941
bordeaux.volume29
bordeaux.peerReviewedoui
hal.identifierhal-02972460
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02972460v1
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