| Autor: |
Álvares-Carvalho SV; Programa de Pós-Graduação em Agricultura e Biodiversidade, Laboratório do Grupo de Pesquisa em Conservação, Melhoramento e Gestão de Recursos Genéticos/GENAPLANT, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil sheilaalvares@yahoo.com.br., Silva-Mann R; Laboratório do Grupo de Pesquisa em Conservação, Melhoramento e Gestão de Recursos Genéticos/GENAPLANT, Departamento de Engenharia Agronômica, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil., Gois IB; Programa de Pós-Graduação em Genética e Melhoramento, Universidade Federal de Viçosa, Viçosa, MG, Brasil., Melo MFV; Centro de Ciências Agrárias, Universidade Federal de Alagoas, Rio Largo, AL, Brasil., Oliveira AS; , Brasil., Ferreira RA; Centro de Ciências Agrárias Aplicadas, Departamento de Ciências Florestais, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil., Gomes LJ; Centro de Ciências Agrárias Aplicadas, Departamento de Ciências Florestais, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil. |
| Abstrakt: |
The success of recovery programs on degraded areas is dependent on the genetic material to be used, which should present heterozygosity and genetic diversity in native and recovered populations. This study was carried out to evaluate the model efficiency to enable the recovery of a degraded area of the Lower São Francisco, Sergipe, Brazil. The target species for this study was Schinus terebinthifolius Raddi. Three populations were analyzed, the recovered area, seed-tree source population, and native tree population border established to the recovered area. The random amplified polymorphic DNA (RAPD) markers were used for diversity analysis. Genetic structure was estimated to evaluate the level of genetic variability existent in each population. There was no correlation between the spatial distribution and the genetic distances for all trees of the recovered area. The heterozygosity present in the recovered population was higher than the native tree population. The seed-tree source population presents genetic bottlenecks. Three clusters were suggested (ΔK = 3) with non-genetic structure. High intra-population genetic variability and inter-population differentiation are present. However, gene flow may also introduce potentially adaptive alleles in the populations of the recovered area, and the native population is necessary to ensure the sustainability and maintenance of the populations by allelic exchange. |
