A large historical refugium explains spatial patterns of genetic diversity in a Neotropical savanna tree species

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dc.creatorSouza, Helena Augusta Viana e
dc.creatorCollevatti, Rosane Garcia
dc.creatorRibeiro, Matheus de Souza Lima
dc.creatorLemos Filho, José Pires de
dc.creatorLovato, Maria Bernadete
dc.date.accessioned2023-03-24T12:25:22Z
dc.date.available2023-03-24T12:25:22Z
dc.date.issued2017
dc.description.abstractBackground and Aims The relative role of Pleistocene climate changes in driving the geographic distribution and genetic diversity of South American species is not well known, especially from open biomes such as the Cerrado, the most diverse tropical savanna, encompassing high levels of endemism. Here the effects of Quaternary climatic changes on demographic history, distribution dynamics and genetic diversity of Dimorphandra mollis, an endemic tree species widely distributed in the Cerrado, were investigated. Methods A total of 38 populations covering most of the distribution of D. mollis were analysed using internal transcribed spacer (ITS) sequences and nuclear microsatellite variation [simple sequence repeats (SSRs)]. The framework incorporated statistical phylogeography, coalescent analyses and ecological niche modelling (ENM). Key Results Different signatures of Quaternary climatic changes were found for ITS sequences and SSRs corresponding to different time slices. Coalescent analyses revealed large and constant effective population sizes, with high historical connectivity among the populations for ITS sequences and low effective population sizes and gene flow with recent population retraction for SSRs. ENMs indicated a slight geographical range retraction during the Last Glacial Maximum. A large historical refugium across central Brazil was predicted. Spatially explicit analyses showed a spatial cline pattern in genetic diversity related to the paleodistribution of D. mollis and to the centre of its historical refugium. Conclusions The complex genetic patterns found in D. mollis are the result of a slight geographical range retraction during the Last Glacial Maximum followed by population expansion to the east and south from a large refugium in the central part of the Cerrado. This historical refugium is coincident with an area predicted to be climatically stable under future climate scenarios. The identified refugium should be given high priority in conservation polices to safeguard the evolutionary potential of the species under predicted future climatic changes.pt_BR
dc.identifier.citationSOUZA, Helena Augusta Viana e; COLLEVATTI, Rosane Garcia; LIMA-RIBEIRO, Matheus S.; LEMOS-FILHO, José Pires de; LOVATO, Maria Bernadete. A large historical refugium explains spatial patterns of genetic diversity in a Neotropical savanna tree species. Annals of Botany, Oxford, v. 119, n. 2, p. 239-252, 2017. DOI: 10.1093/aob/mcw096. Epub 2016 Jun 16. Disponível em: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5321056/. Acesso em: 22 mar. 2023.pt_BR
dc.identifier.doi10.1093/aob/mcw096. Epub 2016 Jun 16
dc.identifier.issn0305-7364
dc.identifier.urihttp://repositorio.bc.ufg.br/handle/ri/22170
dc.language.isoengpt_BR
dc.publisher.countryGra-bretanhapt_BR
dc.publisher.departmentInstituto de Ciências Biológicas - ICB (RG)pt_BR
dc.rightsAcesso Abertopt_BR
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectCerradopt_BR
dc.subjectRefugiumpt_BR
dc.subjectClimatic changespt_BR
dc.subjectCoalescent analysispt_BR
dc.subjectDemographic historypt_BR
dc.subjectPhylogeographypt_BR
dc.subjectDimorphandra mollispt_BR
dc.subjectNeotropical savannapt_BR
dc.subjectEcological niche modellingpt_BR
dc.subjectGenetic diversitypt_BR
dc.titleA large historical refugium explains spatial patterns of genetic diversity in a Neotropical savanna tree speciespt_BR
dc.typeArtigopt_BR

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