Schinus terebinthifolia Raddi: a comparative framework on population genetic structure in a restored area after 12 years

• DOI: 10.1007/s10722-022-01384-9
• Publication Date: 2022-04-18T17:05:55Z
• Authors: Erica Moraes Sant...; Sheila Valéria Ál...; Robério Anastácio...; Renata Silva-Mann
• Keywords: Effective population size; Biome; Gene pool

Abstract The success of restoration projects depends upon the genetic diversity of the implanted species. It is a limiting factor, often because the seed sources are immersed in highly fragmented landscapes. This work was carried out to compare the genetic diversities of the juveniles and the adult trees of Schinus terebinthifolia Raddi in a mixed reforestation area, both in the restoration process and in the remaining natural area in the Atlantic Forest. Through five SSR primers, it was observed that the implanted population showed a greater genetic diversity index (He) (0.553 adults and 0.505 juveniles) when compared to the wild population (0.487 adults and 0.483 juveniles). It indicated that the forested area was established with individuals of high genetic diversity. There was a reduction of genetic diversity, with the loss of exclusive alleles and maintenance of inbreeding and coancestry in the juveniles of the reforested population. It can be inferred that there was a low gene flow among the fragments. The effective population size in both populations (adults and juveniles) was lower than that recommended for conserving populations in the short and long terms. These results have shown that continuous monitoring of this particular area is of absolute necessity and for applying techniques that can promote the connectivity of the fragments. It would allow for a more significant reduction of genetic drift and the persistence of the planted populations.