Abstract
One of the most important aspects for population ecology and evolution is to understand the connectivity between individuals and their groups. In this study, amplified fragment length polymorphism (AFLP) markers were employed aiming to examine genetic diversity, spatial genetic structure, and internal gene flow of nine populations of Schinus molle across the Brazilian Pampa. The dispersal capacity of S. molle in the Brazilian Pampa, the implications of the forest fragmentation to species genetic structure, and the impact of the actual genetic structure of the species to its conservation and management were investigated. AFLP markers revealed low genetic diversity and clear genetic structure among populations. Significant fine-scale spatial genetic structure at short distances was observed in all populations. Estimates of gene dispersal distance suggest that the dispersion capacity of this species is larger than the area covered by the studied populations. However, fragmentation hampers the gene flow among populations. The management of S. molle natural occurrence in this biome seems to be simple considering the species plasticity. The conservation of the species genetic resource depends on maintaining the extant forest patches and promoting their connectivity.
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Acknowledgments
We would like to thank CNPq (processes 471812/2011-0 and 474758/2012-5) and UNIPAMPA (PROPESQ and PROPG) by the financial support.
Data archiving statement
AFLP data are available in the TreeGenes database (http://dendrome.ucdavis.edu/treegenes/) under accession number TGDR045.
Compliance with ethical standards
All ethical standards in scientific research were followed.
Conflict of interest
Authors claim there is no conflict of interest in this study.
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Communicated by G. G. Vendramin
Topical Collection on Population structure
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Supplementary File 1
Plot diagram of the AFLP loci neutrality analysis based on the F ST values of each loci. (JPEG 1279 kb)
Supplementary File 2
PCoA plot of the S. molle populations based on the full AFLP dataset (250 loci) and on the partial dataset, excluding the outlier markers (238 loci). (JPEG 1393 kb)
Supplementary File 3
Patterns of genetic diversity estimated for the dataset excluding the outlier loci (238 bands) and for the full dataset (250 bands). (JPEG 1230 kb)
Supplementary File 4
Geographic position of each tree of S. molle within the sampled populations. Note that the distance scale is different for each population. (DOCX 70 kb)
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Lemos, R.P.M., D’Oliveira, C.B. & Stefenon, V.M. Genetic structure and internal gene flow in populations of Schinus molle (Anacardiaceae) in the Brazilian Pampa. Tree Genetics & Genomes 11, 75 (2015). https://doi.org/10.1007/s11295-015-0885-7
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DOI: https://doi.org/10.1007/s11295-015-0885-7