Use este identificador para citar ou linkar para este item: http://repositorio.bc.ufg.br/handle/ri/19266
Tipo do documento: Artigo
Título: Contrasting spatial genetic structure in Annona crassiflora populations from fragmented and pristine savannas
Autor: Collevatti, Rosane Garcia
Telles, Mariana Pires de Campos
Lima, Jacqueline de Souza
Gouveia, Felipe Oliveira
Soares, Thannya Nasciento
Abstract: In continuous populations, fine-scale genetic structure tends to be stronger in species with restricted pollen and seed dispersal. However, habitat fragmentation and disturbances can affect genetic diversity and spatial genetic structure due to disruption in ecological processes, such as plant reproduction and seed dispersal. In this study, we compared the genetic diversity and fine-scale spatial genetic structure (SGS) in two populations of Annona crassiflora (Annonaceae) in a pristine savanna Reserve (ESECAE) and in a fragmented disturbed savanna area (PABE), both in Cerrado biome in Central Brazil. The analyses were based on the polymorphism at 10 microsatellite loci. Our working hypothesis was that SGS is stronger and genetic diversity is lower in population at fragmented area (PABE) than at pristine area (ESECAE). Both populations presented high levels of polymorphism and genetic diversity and showed no sign of bottleneck for both Wilcoxon sign-rank test for heterozygosity excess (p[0.05) and coalescent analyses (growth parameter g not different from zero), but population at fragmented area showed higher fixation index and stronger SGS. Besides, populations are significantly differentiated (FST = 0.239, RST = 0.483, p\0.001 for both). Coalescent analyses showed high historical effective population sizes for both populations, high gene flow between ESECAE and PABE and recent time to most recent common ancestor (*37 k year BP). Our results suggest that despite the high genetic diversity, fragmentation and disturbance may have been affecting populations of this species increasing mating between closely related individuals leading to high fixation index and strong SGS.
Palavras-chave: Annonaceae
Cerrado biome
Coalescence
Genetic diversity
Gene flow
Neotropical tree
País: Alemanha
Unidade acadêmica: Instituto de Ciências Biológicas - ICB (RG)
Citação: COLLEVATTI, Rosane G. et al. Contrasting spatial genetic structure in Annona crassiflora populations from fragmented and pristine savannas. Plant Systematics and Evolution, Heidelberg , v. 300, p. 1719-1727, 2014.
Tipo de acesso: Acesso Aberto
Identificador do documento: 10.1007/s00606-014-0997-9
Endereço da licença: http://creativecommons.org/licenses/by-nc-nd/4.0/
Identificador do documento: 10.1007/s00606-014-0997-9
URI: http://repositorio.bc.ufg.br/handle/ri/19266
Data de publicação: 2014
Aparece nas coleções:EA - Artigos publicados em periódicos

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