Patterns of microsatellite variability among X chromosomes and autosomes indicate a high frequency of beneficial mutations in non-African D. simulans.

We analyzed microsatellite variability at 42 X-linked and 39 autosomal loci from African and European populations of Drosophila simulans. The African D. simulans harbored significantly more microsatellite variability than the European flies. In the European population, X-linked polymorphism was more reduced than autosomal variation, whereas there was no… (More)