Patterns of genetic variability in central and peripheral populations of Dipteryx alata (Fabaceae) in the Brazilian Cerrado

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dc.creatorSoares, Thannya Nascimento
dc.creatorDiniz Filho, Jose Alexandre Felizola
dc.creatorNabout, João Carlos
dc.creatorTelles, Mariana Pires de Campos
dc.creatorTerribile, Levi Carina
dc.creatorChaves, Lázaro José
dc.date.accessioned2020-11-20T11:54:07Z
dc.date.available2020-11-20T11:54:07Z
dc.date.issued2015
dc.description.abstractThis study tested whether genetic parameters in Dipteryx alata populations, estimated from genomic and chloroplastidial microsatellite markers, were distributed according to a central-peripheral model, inferring which factors drive this spatial distribution of genetic variability within populations. For each of the 23 populations sampled throughout the species’ range, the mean number of alleles per locus, expected heterozygosity and intrapopulation fixation indices were calculated using a rarefaction approach based on 54 alleles from 8 nuclear microsatellites. Explanatory variables were grouped into three subsets: the ecological suitability estimated by combining different techniques of ecological niche modeling, variables expressing human occupation, and a historical variable represented by the first eigenvector from the pairwise FST matrix based on cpDNA microsatellites. Each response variable was modeled using first (linear) and second (quadratic) order trend surface analysis (TSA). Multiple regressions were then used to evaluate the relative effects of the explanatory variables, based on AIC multi-model selection. In general, the genetic parameters did not follow a classical central-periphery model. Ecological suitability had a significance influence in all genetic parameters, so more suitable regions have higher genetic diversity and low endogamy. There was also a relationship between fixation indices and human impacts. The high genetic diversity in the southwestern region of Cerrado suggested that recent range expansion (after the Last Glacial Maximum) may also influenced the observed intrapopulation genetic patterns. Thus, complex combinations of both historical and ecological drivers, as well as contemporary human occupation, seem to drive current genetic composition within D. alata populations throughout its geographic range.pt_BR
dc.identifier.citationSOARES, Thannya N. et al. Patterns of genetic variability in central and peripheral populations of Dipteryx alata (Fabaceae) in the Brazilian Cerrado. Plant Systematics and Evolution, Heidelberg , v. 301, p. 1315-1324, 2015.pt_BR
dc.identifier.doi10.1007/s00606-014-1155-0
dc.identifier.issne- 1615-6110
dc.identifier.issn0378-2697
dc.identifier.urihttp://repositorio.bc.ufg.br/handle/ri/19264
dc.language.isoengpt_BR
dc.publisher.countryAlemanhapt_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.subjectConservationpt_BR
dc.subjectMicrosatellitept_BR
dc.subjectNiche modelpt_BR
dc.subjectTropical treept_BR
dc.titlePatterns of genetic variability in central and peripheral populations of Dipteryx alata (Fabaceae) in the Brazilian Cerradopt_BR
dc.typeArtigopt_BR

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