Data/hora: 09/06/2024 08:39:34

Provedor de dados: | 74
País: | Brazil
Título: | Gene pool sharing and genetic bottleneck effects in subpopulations of Eschweilera ovata (Cambess.) Mart. ex Miers (Lecythidaceae) in the Atlantic Forest of southern Bahia, Brazil
Autores: | Santos,Alesandro S.; Borges,Daniela B.; Vivas,Caio V.; Berg,Cassio Van Den; Rodrigues,Polliana S.; Tarazi,Roberto; Gaiotto,Fernanda Amato.
Data: | 2019-09-01
Ano: | 2019
Palavras-chave: | Functional connectivity; Tree species; Chloroplast; Founder effect; Simple sequence repeat development.
Resumo: | Abstract Forest loss and fragmentation are the main threats to the maintenance of the Atlantic Forest, an important global biodiversity hotspot. Because of the current critical level of deforestation, ecological corridors are needed to facilitate species dispersion and gene flow among fragments. This study was conducted to investigate the genetic variability and gene pool sharing of Eschweilera ovata in five forest remnants in southern Bahia, Brazil using nuclear simple sequence repeat (nSSR) and plastid simple sequence repeat (cpSSR) microsatellite markers. cpSSR marker analysis revealed the domains of four haplotypes, showing that 80% of the individuals had only four maternal origins, reflecting a founder effect and/or genetic bottleneck. The results of cpSSR and nSSR analyses indicated moderate genetic diversity, particularly in conservation units with full protection, which showed the best parameters of all areas evaluated. Another indication of the susceptibility of these populations to forest loss and fragmentation was the strong genetic bottleneck observed. In contrast, genetic structure analyses (FST and discriminant analysis of principal components) revealed gene pool sharing between the subpopulations, which may reflect the historical gene flow that occurred before forest fragmentation.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000400655
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/1678-4685-gmb-2018-0140
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.42 n.3 2019
Fonte: | info:eu-repo/semantics/openAccess