Parallel Geographic Variation in Drosophila melanogaster

摘要: Drosophila melanogaster, an ancestrally African species, has recently spread throughout the world, associated with human activity. The species served as focus of many studies investigating local adaptation relating to latitudinal variation in non-African populations, especially those from United States and Australia. These have documented existence shared, genetically determined phenotypic clines for several life history morphological traits. However, there are no designed formally address degree shared differentiation at genomic level. Here we present our comparative analysis such differentiation. Not surprisingly, find evidence substantial, selection responses on two continents, probably resulting standing ancestral variation. polymorphic inversion In(3R)P important effect this pattern, but considerable parallelism is also observed across genome regions not polymorphism. Interestingly, parallel even variants that particularly strongly differentiated, which suggests very large numbers polymorphisms targets spatially varying species.