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Adaptation of a plant pathogen to partial host resistance: selection for greater aggressiveness in grapevine downy mildew

hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorDELMAS, Chloé E. L.
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorFABRE, Frédéric
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorJOLIVET, Jerome
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorMAZET, Isabelle D.
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorRICHART CERVERA, Sylvie
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorDELIERE, Laurent
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorDELMOTTE, François
dc.date.accessioned2024-04-08T12:32:57Z
dc.date.available2024-04-08T12:32:57Z
dc.date.issued2016
dc.identifier.issn1752-4563
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/197165
dc.description.abstractEnAn understanding of the evolution of pathogen quantitative traits in response to host selective pressures is essential for the development of durable management strategies for resistant crops. However, we still lack experimental data on the effects of partial host resistance on multiple phenotypic traits (aggressiveness) and evolutionary strategies in pathogens. We performed a cross-inoculation experiment with four grapevine hosts and 103 isolates of grapevine downy mildew (Plasmopara viticola) sampled from susceptible and partially resistant grapevine varieties. We analysed the neutral and adaptive genetic differentiation of five quantitative traits relating to pathogen transmission. Isolates from resistant hosts were more aggressive than isolates from susceptible hosts, as they had a shorter latency period and higher levels of spore production. This pattern of adaptation contrasted with the lack of neutral genetic differentiation, providing evidence for directional selection. No specificity for a particular host variety was detected. Adapted isolates had traits that were advantageous on all resistant varieties. There was no fitness cost associated with this genetic adaptation, but several trade-offs between pathogen traits were observed. These results should improve the accuracy of prediction of fitness trajectories for this biotrophic pathogen, an essential element for the modelling of durable deployment strategies for resistant varieties.
dc.language.isoen
dc.publisherBlackwell
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subjecterosion
dc.subjectquantitative resistance
dc.subject.enevolvability
dc.subject.enfitness cost
dc.subject.enhost specificity
dc.subject.enobligate plant pathogen
dc.subject.envirulence
dc.subject.enVitis vinifera
dc.title.enAdaptation of a plant pathogen to partial host resistance: selection for greater aggressiveness in grapevine downy mildew
dc.typeArticle de revue
dc.identifier.doi10.1111/eva.12368
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalEvolutionary Applications
bordeaux.page709-725
bordeaux.volume9
bordeaux.hal.laboratoriesSanté et Agro-Ecologie du Vignoble (SAVE) - UMR 1065*
bordeaux.issue5
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02633839
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02633839v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Evolutionary%20Applications&rft.date=2016&rft.volume=9&rft.issue=5&rft.spage=709-725&rft.epage=709-725&rft.eissn=1752-4563&rft.issn=1752-4563&rft.au=DELMAS,%20Chlo%C3%A9%20E.%20L.&FABRE,%20Fr%C3%A9d%C3%A9ric&JOLIVET,%20Jerome&MAZET,%20Isabelle%20D.&RICHART%20CERVERA,%20Sylvie&rft.genre=article


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