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

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dc.careerCiencias Biológicases
dc.category.authorprincipalen_US
dc.contributor.authorValencia Reyes, Lius Renato
dc.contributor.correspondingValencia Reyes, Lius Renato
dc.countryEcuadores
dc.date.accessioned2023-11-04T21:37:10Z
dc.date.available2023-11-04T21:37:10Z
dc.date.issued2013
dc.dedication.authorTCes
dc.description.abstractAim: 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. Location: Lowland moist forests in the Guiana Shield, the Central and Western Amazon Basin, Chocó and Central America. Methods: 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. Results: 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. Main conclusions: 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.en_US
dc.facultyCiencias Exactas y Naturaleses
dc.id.author1706673199
dc.id.type1
dc.identifier.doi10.1111/j.1365-2699.2011.02678.x
dc.identifier.issn13652699 - 03050270
dc.identifier.urihttps://repositorio.puce.edu.ec/handle/123456789/5579
dc.identifier.urihttp://onlinelibrary.wiley.com/doi/10.1111/j.1365-2699.2011.02678.x/full
dc.indexed.databaseScimago Journal Rankes
dc.language.isoen
dc.list.authorsScotti-, C., Dick, C., Caron, H., Vendramin, G., Guichoux, E., Buonamici, A., Duret, D., Sire, P., Valencia, R., Lemes, M., Gribel, R., Scotti, I.
dc.magazine.pageRange676–692
dc.magazine.titleJournal of Biogeographyen_US
dc.magazine.volumeChapter40 (4)
dc.rightsClosedAccessen
dc.statepublisheden_US
dc.subjectAmazoniaes
dc.subjectCarapaes
dc.subjectHistorical biogeographyes
dc.subjectMahogany familyes
dc.subjectMolecular markerses
dc.subjectNeogene diversificationes
dc.subjectPhylogeographyes
dc.subjectQuaternary diversificationes
dc.subjectSpecies complexeses
dc.subjectAmazonia
dc.subjectCarapa
dc.subjectHistorical biogeography
dc.subjectMahogany family
dc.subjectMolecular markers
dc.subjectNeogene diversification
dc.subjectPhylogeography
dc.subjectQuaternary diversification
dc.subjectSpecies complexes
dc.titlePhyogeogrphy of a species complex of lowland Neotropical rain forest trees (Carapa, Meliaceae).en_US
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