Resumo

PAZ P., GISELA MABEL. VARIABILIDADE GENÉTICA DO ROBLE COMUM (Quercus humboldtii BONPL.) NA REGIÃO DO MACIZO COLOMBIANO. Rev.Bio.Agro [online]. 2012, vol.10, n.2, pp.110-116. ISSN 1692-3561.

Genetics impacts of fragmentation in populations depend, among other factors, of gene flow. With a restricted gene flow, fragmentation increases the probability of homozygosity and the loss of genetic diversity. These populations involve some species such as Quercus humboldtii (oak). To measure the levels of genetic diversity in 120 samples from 4 different populations in the Colombian Andean region (Macizo Colombiano), six primers of RAPDs markers were used. A total of 123 loci were obtained in all the populations, 122 of them were found to be polimorphic. The genetic diversity was of 0.4583 and the statistic value of genetic structure (GST) was of 0.1616 with a genetic flow value of 2.58. Based on the results, it was underlined that there is a level of genetic structuration among the populations and for its sustenance and preservation of germplasm, it is reccomended: if the objective is to keep a panmictic unit, it is required to generate biologic corridors; but if it is required to maintain the current differentiation it wont be necessary the creation of these corridors but the creation of plans of local reforestation.

Palavras-chave : Genetic diversity; Genetic structure; Conservation genetics.

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