Cryptic species and phylogeographical structure in the tree Cedrela odorata L. throughout the Neotropics.

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dc.careerCiencias Biológicases
dc.category.authorprincipalen_US
dc.contributor.authorValencia Reyes, Luis Renato
dc.contributor.correspondingStephen, Cavers
dc.countryEcuadores
dc.date.accessioned2023-11-04T21:36:10Z
dc.date.available2023-11-04T21:36:10Z
dc.date.issued2013
dc.dedication.authorTCes
dc.description.abstractAim: The origins of much Neotropical biodiversity remain a topic of debate, with both palaeogeographical and more recent climatic drivers playing a role in diversification both among and within species. Here we use a combination of molecular data to assess genetic variation within and among species in the Neotropical tree genus Cedrela, with a focus on Cedrela odorata, to test hypotheses on the drivers of diversification, to place known ecotypic variation in context and to detect intraspecific phylogeographical structure. Location: Central and South America, Cuba, Cayman Islands, Trinidad and Guadeloupe. Methods: Samples were collected from the field, existing collections and herbaria from across the geographical range, including a total of 528 individuals from 72 sites. A phylogenetic framework was constructed using internal transcribed spacer (ITS) sequence data (intergenic spacers plus flanking 18S and 26S regions), and genetic structure was analysed using a combination of chloroplast DNA sequences (trnC–ycf6, trnH–psbA) and chloroplast and nuclear microsatellite (single sequence repeat, SSR) loci. Phylogenetic reconstruction was undertaken using a combination of Bayesian and parsimony-based approaches; divergence times were estimated for major nodes. Geographical structure in chloroplast SSR data was analysed using SAMOVA, while that in nuclear SSR data was assessed using a combination of Bayesian clustering and principal coordinates analysis. Results: ITS sequence data supported phylogenetic distinctiveness of four morphologically cryptic species within C. odorata. Chloroplast sequence and microsatellite data showed geographical structuring both among and within species, suggesting the influence of climatic and geographical drivers. Intraspecific genetic divergence was also present in nuclear microsatellite data, suggesting contemporary gene flow limitation across sea and mountain barriers. Main conclusions: The data support diversification of the genus Cedrela in South America with subsequent recolonization into Central America prior to the formation of the Isthmus of Panama. At least four morphologically cryptic taxa were evident within C. odorata and within-species phylogeographical divergence across the Andes and within Central America was present, the latter suggestive of Pleistocene climatic influence. Previously recognized ecotypes in Central America should be elevated to species level. The new molecular data support the recent reclassification and will support the monitoring of exploitation in the genus.en_US
dc.facultyCiencias Exactas y Naturaleses
dc.id.author1706673199
dc.id.type1
dc.identifier.doi10.1111/jbi.12086
dc.identifier.issn03050270
dc.identifier.urihttps://repositorio.puce.edu.ec/handle/123456789/5494
dc.identifier.urihttp://onlinelibrary.wiley.com/doi/10.1111/jbi.12086/full
dc.indexed.databaseOtheres
dc.language.isoen
dc.list.authorsCavers, S., Telford, A., Arenal, F., Pérez, J., Valencia, R., Navarro, C., Buonamici, A., Lowe, A., Vendramin, G.
dc.magazine.pageRange732–746
dc.magazine.titleJournal of Biogeographyen_US
dc.magazine.volumeChapter40 (4)
dc.rightsClosedAccessen
dc.statepublisheden_US
dc.subjectConservation geneticses
dc.subjectCryptic specieses
dc.subjectDispersales
dc.subjectDiversificationes
dc.subjectMeliaceaees
dc.subject|Neogenees
dc.subjectPhylogeographyes
dc.subjectPleistocenees
dc.subjectSpanish cedares
dc.subjectVicariancees
dc.subjectConservation genetics
dc.subjectCryptic species
dc.subjectDispersal
dc.subjectDiversification
dc.subjectMeliaceae
dc.subject|Neogene
dc.subjectPhylogeography
dc.subjectPleistocene
dc.subjectSpanish cedar
dc.subjectVicariance
dc.titleCryptic species and phylogeographical structure in the tree Cedrela odorata L. throughout the Neotropics.en_US
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