Using genetic diversity and mating system parameters estimated from genetic markers to determine strategies for the conservation of Araucaria angustifolia (Bert.) O. Kuntze (Araucariaceae)

摘要: In order to understand the impacts of forest fragmentation on Araucaria angustifolia populations, we evaluated genetic diversity and mating system using SSR markers open-pollinated seeds from four populations varying sizes spatial isolation, in around one best-conserved Forest remnants Southern Brazil. The population types A. include: (1) a continuous forest; (2) physically isolated cluster located 2 km (3) an open field between (4) fragment private property 5 km cluster. Approximately 28 were collected ten reproductive trees each population. We found higher amounts alleles (113) exclusive (25) than other populations. multilocus paternity correlation was significantly effective number pollen donors lower population, decreasing consequently variance size families sampled that However, despite its isolation studied fragments, had second highest as well unique Therefore, strategies for conservation should focus not only larger such those protected areas, but also include smaller fragments properties these are able maintain high levels functional connectivity stands across landscape.