Use este identificador para citar ou linkar para este item:
Tipo do documento: Artigo
Título: Geographical patterns of turnover and nestedness-resultant components of allelic diversity among populations
Autor: Diniz Filho, Jose Alexandre Felizola
Collevatti, Rosane Garcia
Soares, Thannya Nascimento
Telles, Mariana Pires de Campos
Abstract: The analysis of geographical patterns in population divergence has always been a powerful way to infer microevolutionary processes involved in population differentiation, and several approaches have been used to investigate such patterns. Most frequently, multivariate spatial patterns of population differentiation are analyzed by computing pairwise genetic distances or FST (or related statistics, such as /ST from AMOVA), which are then correlated with geographical distances or landscape features. However, when calculating distances, especially based on presence-absence of alleles in local populations, there would be a confounding effect of allelic richness differences in the population differentiation. Moreover, the relative magnitude of these components and their spatial patterns can help identifying microevolutionary processes driving population differentiation. Here we show how recent methodological advances in ecological community analyses that allows partitioning dissimilarity into turnover (turnover) and richness differences, or nestedness-resultant dissimilarity, can be applied to allelic variation data, using an endemic Cerrado tree (Dipteryx alata) as a case study. Individuals from 15 local populations were genotyped for eight microsatellite loci, and pairwise dissimilarities were computed based on presence-absence of alleles. The turnover of alleles among populations represented 69 % of variation in dissimilarity, but only the richness difference component shows a clear spatial structure, appearing as a westward decrease of allelic richness. We show that decoupling richness difference and turnover components of allelic variation reveals more clearly how similarity among populations reflects geographical patterns in allelic diversity that can be interpreted in respect to historical range expansion in the species.
Palavras-chave: Allelic richness
Spatial genetic structure
Population divergence
Dipteryx alata
Mantel test
País: Holanda
Unidade acadêmica: Instituto de Ciências Biológicas - ICB (RG)
Citação: DINIZ-FILHO, Jose Alexandre Felizola et al. Geographical patterns of turnover and nestedness-resultant components of allelic diversity among populations. Genetica, Dordrecht, v. 140, p. 189-195, 2012.
Tipo de acesso: Acesso Aberto
Identificador do documento: 10.1007/s10709-012-9670-9
Endereço da licença:
Identificador do documento: 10.1007/s10709-012-9670-9
Data de publicação: 2012
Aparece nas coleções:EA - Artigos publicados em periódicos

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
Artigo - Jose Alexandre Felizola Diniz Filho - 2012.pdf276,16 kBAdobe PDFThumbnail

Este item está licenciada sob uma Licença Creative Commons Creative Commons