Contrasting spatial genetic structure in Annona crassiflora populations from fragmented and pristine savannas

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dc.creatorCollevatti, Rosane Garcia
dc.creatorTelles, Mariana Pires de Campos
dc.creatorLima, Jacqueline de Souza
dc.creatorGouveia, Felipe Oliveira
dc.creatorSoares, Thannya Nasciento
dc.date.accessioned2020-11-23T15:33:34Z
dc.date.available2020-11-23T15:33:34Z
dc.date.issued2014
dc.description.abstractIn 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.pt_BR
dc.identifier.citationCOLLEVATTI, 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.pt_BR
dc.identifier.doi10.1007/s00606-014-0997-9
dc.identifier.issne- 1615-6110
dc.identifier.issn0378-2697
dc.identifier.urihttp://repositorio.bc.ufg.br/handle/ri/19266
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.subjectAnnonaceaept_BR
dc.subjectCerrado biomept_BR
dc.subjectCoalescencept_BR
dc.subjectGenetic diversitypt_BR
dc.subjectGene flowpt_BR
dc.subjectNeotropical treept_BR
dc.titleContrasting spatial genetic structure in Annona crassiflora populations from fragmented and pristine savannaspt_BR
dc.typeArtigopt_BR

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