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hal.structure.identifierLaurentian Forestry Centre
hal.structure.identifierCentre d'Etude de la Forêt [Faculté de foresterie, de géographie et de géomatique]
hal.structure.identifierInstitut de Biologie Intégrative et des Systèmes [IBIS]
dc.contributor.authorVIALLE, Agathe
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorFEAU, Nicolas
hal.structure.identifierInteractions Arbres-Microorganismes [IAM]
dc.contributor.authorFREY, Pascal
hal.structure.identifierCentre d'Etude de la Forêt [Faculté de foresterie, de géographie et de géomatique]
hal.structure.identifierInstitut de Biologie Intégrative et des Systèmes [IBIS]
dc.contributor.authorBERNIER, Louis
hal.structure.identifierLaurentian Forestry Centre
dc.contributor.authorHAMELIN, Richard C.
dc.date.issued2013
dc.identifier.issn1055-7903
dc.description.abstractEnFungal species belonging to the genus Melampsora (Basidiomycota, Pucciniales) comprise rust pathogens that alternate between Salicaceae and other plant hosts. Species delineation and identification are difficult within this group due to the paucity of observable morphological features. Several Melampsora rusts are highly host-specific and this feature has been used for identification at the species level. However, this criterion is not always reliable since different Melampsora rust species can overlap on one host but specialize on a different one. To date, two different species recognition methods are used to recognize and define species within the Melampsora genus: (i) morphological species recognition, which is based solely on morphological criteria; and (ii) ecological species recognition, which combines morphological criteria with host range to recognize and define species. In order to clarify species recognition within the Melampsora genus, we applied phylogenetic species recognition to Melampsora poplar rusts by conducting molecular phylogenetic analyses on 15 Melampsora taxa using six nuclear and mitochondrial loci. By assessing the genealogical concordance between phylogenies, we identified 12 lineages that evolved independently, corresponding to distinct phylogenetic species. All 12 lineages were concordant with host specialization, but only three belonged to strictly defined morphological species. The estimation of the species tree obtained with Bayesian concordance analysis highlighted a potential co-evolutionary history between Melampsora species and their reciprocal aecial host plants. Within the Melampsora speciation process, aecial host may have had a strong effect on ancestral evolution, whereas telial host specificity seems to have evolved more recently. The morphological characters initially used to define species boundaries in the Melampsora genus are not reflective of the evolutionary and genetic relationships among poplar rusts. In order to construct a more meaningful taxonomy, host specificity must be considered an important criterion for delineating and describing species within the genus Melampsora as previously suggested by ecological species recognition.
dc.language.isoen
dc.publisherElsevier
dc.subjectMelampsora
dc.subject.enhost-pathogen co-evolution
dc.subject.engenealogical concordance phylogenetic species recognition
dc.subject.enbayesian concordance analysis
dc.subject.enphylogenetic species
dc.title.enPhylogenetic species recognition reveals host-specific lineages among poplar rust fungi
dc.typeArticle de revue
dc.identifier.doi10.1016/j.ympev.2012.10.021
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalMolecular Phylogenetics and Evolution
bordeaux.page628 - 644
bordeaux.volume66
bordeaux.issue3
bordeaux.peerReviewedoui
hal.identifierhal-01577787
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01577787v1
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