Evolutionary dynamics of molecular markers during local adaptation: a case study in Drosophila subobscura.

ABSTRACT:

Background

Natural selection and genetic drift are major forces responsible for temporal genetic changes in populations. Furthermore, these evolutionary forces may interact with each other. Here we study the impact of an ongoing adaptive process at the molecular genetic level by analyzing the temporal genetic changes throughout 40 generations of adaptation to a common laboratory environment. Specifically, genetic variability, population differentiation and demographic structure were compared in two replicated groups of Drosophila subobscura populations recently sampled from different wild sources.

Results

We found evidence for a decline in genetic variability through time, along with an increase in genetic differentiation between all populations studied. The observed decline

SUBMITTER: Simoes P 

PROVIDER: S-EPMC2266711 | biostudies-literature | 2008 Feb

REPOSITORIES: biostudies-literature