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Phylogeography of a species complex of lowland Neotropical rain forest trees (Carapa, Meliaceae)

hal.structure.identifierEcologie des forêts de Guyane [ECOFOG]
dc.contributor.authorSCOTTI-SAINTAGNE, Caroline
hal.structure.identifierDepartment of Ecology and Evolutionary Biology
dc.contributor.authorDICK, Christopher W.
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorCARON, Henri
dc.contributor.authorVENDRAMIN, Giovanni G.
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorGUICHOUX, Erwan
dc.contributor.authorBUONAMICI, Anna
hal.structure.identifierEcologie des forêts de Guyane [ECOFOG]
dc.contributor.authorDURET, Caroline
hal.structure.identifierEcologie des forêts de Guyane [ECOFOG]
dc.contributor.authorSIRE, Pierre
hal.structure.identifierLaboratorio de Ecología de Plantas y Herbario QCA, Escuela de Ciencias Biológicas
dc.contributor.authorVALENCIA, Renato
hal.structure.identifierLaboratório de Genética e Biologia Reprodutiva de Plantas
dc.contributor.authorLEMES, Maristerra R.
hal.structure.identifierLaboratório de Genética e Biologia Reprodutiva de Plantas
dc.contributor.authorGRIBEL, Rogério
hal.structure.identifierEcologie des forêts de Guyane [ECOFOG]
dc.contributor.authorSCOTTI, Ivan
dc.date.issued2013
dc.identifier.issn0305-0270
dc.description.abstractEn[b]Aim[/b][br/] Many tropical tree species have poorly delimited taxonomic boundaries and contain undescribed or cryptic species. We examined the genetic structure of a species complex in the tree genus Carapa in the Neotropics in order to evaluate age, geographic patterns of diversity and evolutionary relationships, and to quantify levels of introgression among currently recognized species.[br/] [br/] [b]Location[/b][br/] Lowland moist forests in the Guiana Shield, the Central and Western Amazon Basin, Chocó and Central America.[br/] [br/] [b]Methods[/b][br/] Genetic structure was analysed using seven nuclear simple sequence repeats (nuSSR), five chloroplast SSRs (cpSSR), and two chloroplast DNA (cpDNA) intergenic sequences (trnH-psbA and trnC-ycf6). Bayesian clustering analysis of the SSR data was used to infer population genetic structure and to assign 324 samples to their most likely genetic cluster. Bayesian coalescence analyses were performed on the two cpDNA markers to estimate evolutionary relationships and divergence times.[br/] [br/] [b]Results[/b][br/] Two genetic clusters (nu_guianensis and nu_surinamensis) were detected, which correspond to the Neotropical species C. guianensis (sensu latu) and C. surinamensis. Fourteen cpDNA haplotypes clustered into six haplogroups distributed between the two nuclear genetic clusters. Divergence between the haplogroups was initiated in the Miocene, with some haplotype structure evolving as recently as the Pleistocene. The absence of complete lineage sorting between the nuclear and chloroplast genomes and the presence of hybrid individuals suggest that interspecific reproductive barriers are incomplete. NuSSR diversity was highest in C. guianensis and, within C. guianensis, cpDNA diversity was highest in the Central and Western Amazon Basin. Regional genetic differentiation was strong but did not conform to an isolation-by-distance process or exhibit a phylogeographical signal.[br/] [br/] [b]Main conclusions[/b][br/] The biogeographical history of Neotropical Carapa appears to have been influenced by events that took place during the Neogene. Our results point to an Amazonian centre of origin and diversification of Neotropical Carapa, with subsequent migration to the Pacific coast of South America and Central America. Gene flow apparently occurs among species, and introgression events are supported by inconsistencies between chloroplast and nuclear lineage sorting. The absence of phylogeographical structure may be a result of the ineffectiveness of geographical barriers among populations and of reproductive isolation mechanisms among incipient and cryptic species in this species complex.
dc.language.isoen
dc.publisherWiley
dc.subject.enAmazonia
dc.subject.enCarapa
dc.subject.enhistorical biogeography
dc.subject.enMahogany family
dc.subject.enmolecular markers
dc.subject.enNeogene diversification
dc.subject.enphylogeography
dc.subject.enQuaternary diversification
dc.subject.enspecies complexes
dc.title.enPhylogeography of a species complex of lowland Neotropical rain forest trees (Carapa, Meliaceae)
dc.typeArticle de revue
dc.identifier.doi10.1111/j.1365-2699.2011.02678.x
dc.subject.halSciences du Vivant [q-bio]/Sciences agricoles
bordeaux.journalJournal of Biogeography
bordeaux.page676-692
bordeaux.volume40
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-01032395
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01032395v1
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