Genetic Variability of Natural Fragments of Luehea divaricata Mart. & Zucc. in the Atlantic Forest Biome
DOI:
https://doi.org/10.37002/biodiversidadebrasileira.v11i4.1837Keywords:
Genetic erosion, gene flow, germplasm, rehabilitation of degraded areasAbstract
 In this study we used microsatellite markers to analyse the genetic variability of three natural fragments of Luehea divaricata Mart. & Zucc. in the Atlantic Forest, aiming to identify their potential for use in rehabilitation of degraded areas. With the GenAlEx v. 6.5 software, genetic variability parameters and its partition between and within fragments were estimated. Higher genetic variability was observed within the analyzed fragments (77%), which is expected for species whose reproduction is predominantly by crosses. A gene flow greater than 1 (Nm= 3.853) was estimated, which is sufficient to homogenize allelic frequencies and make genetically similar fragments. Due to the high gene flow between fragments, the genetic differentiation index was low (FST = 0.072), which makes them less susceptible to the adverse effects of fragmentation. Therefore, we found that there is genetic variability in the studied L. divaricata fragments, and this information is relevant for planning recovery of degraded areas, in which germplasm collections should prioritize the number of individuals per fragment.Â
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