Show simple item record

Detection of hybrids in nature: application to oaks (Quercus suber and Q-ilex)

hal.structure.identifierUniversidad Politécnica de Madrid [UPM]
dc.contributor.authorBURGARELLA, Concetta
hal.structure.identifierUniversidad Politécnica de Madrid [UPM]
dc.contributor.authorLORENZO, Z.
hal.structure.identifierCentre National de la Recherche Scientifique [CNRS]
dc.contributor.authorJABBOUR-ZAHAB, R.
hal.structure.identifierCentre National de la Recherche Scientifique [CNRS]
dc.contributor.authorLUMARET, Roselyne
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorGUICHOUX, Erwan
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorPETIT, Remy
hal.structure.identifierUniversidad Politécnica de Madrid [UPM]
dc.contributor.authorGIL, L.
dc.date.issued2009
dc.identifier.issn0018-067X
dc.description.abstractEnPowerful and accurate detection of first-generation (F1) hybrids and backcrosses in nature is needed to achieve a better understanding of the function and dynamics of introgression. To document the frequency of ongoing interspecific gene exchange between two Mediterranean evergreen oaks, the cork oak (Quercus suber) and the holm oak (Q. ilex), we analyzed 1487 individuals originating from across the range of the two species using eight microsatellite loci and two Bayesian clustering approaches (implemented in the programs STRUCTURE and NEWHYBRIDS). Simulated data were used to assess the differences between the two clustering methods and to back up the choice of the threshold value for the posterior probability to discriminate admixed from pure individuals. We found that the use of STRUCTURE resulted in the highest power to detect hybrids, whereas NEWHYBRIDS provided the highest accuracy. Irrespective of the approach, the two species were clearly distinguished as independent genetic entities without any prior information. In contrast with previous reports, we found no evidence for unidirectional introgression. The overall hybridization rate was very low (< 2% of introgressed individuals). Only two individuals were identified as F1 hybrids and five as early backcrosses. This work shows that the combined application of the two complementary Bayesian approaches and their systematic validation with simulations, fit for the case at hand, helps gain resolution in the identification of admixed individuals.
dc.language.isoen
dc.publisherNature Publishing Group
dc.subjectMÉTHODE BAYÉSIENNE
dc.subjectQUERCUS SUBER
dc.subjectQ. ILEX
dc.subjectSIMULATION
dc.subjectMICROSATELLITES
dc.subjectCHENE VERT
dc.subject.enINTROGRESSIVE HYBRIDIZATION
dc.subject.enCLUSTERING ANALYSIS
dc.subject.enCHENE LIEGE
dc.subject.enHYBRIDATION INTROGRESSIVE
dc.subject.enANALYSE PAR SEGMENTATION
dc.title.enDetection of hybrids in nature: application to oaks (Quercus suber and Q-ilex)
dc.typeArticle de revue
dc.identifier.doi10.1038/hdy.2009.8
dc.subject.halSciences du Vivant [q-bio]/Médecine humaine et pathologie
bordeaux.journalHeredity
bordeaux.page442–452
bordeaux.volume102
bordeaux.issue5
bordeaux.peerReviewedoui
hal.identifierhal-02664723
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02664723v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Heredity&amp;rft.date=2009&amp;rft.volume=102&amp;rft.issue=5&amp;rft.spage=442%E2%80%93452&amp;rft.epage=442%E2%80%93452&amp;rft.eissn=0018-067X&amp;rft.issn=0018-067X&amp;rft.au=BURGARELLA,%20Concetta&amp;LORENZO,%20Z.&amp;JABBOUR-ZAHAB,%20R.&amp;LUMARET,%20Roselyne&amp;GUICHOUX,%20Erwan&amp;rft.genre=article


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record