2024-03-28T17:04:23Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1525702021-11-22T12:50:37Zcom_10261_9676com_10261_8col_10261_9677
00925njm 22002777a 4500
dc
Bergland, Alan O.
author
Tobler, Ray
author
González Pérez, Josefa
author
Shmidt, Paul
author
Petrov, Dmitri A.
author
2016-03
Populations arrayed along broad latitudinal gradients often show patterns of clinal variation in phenotype and genotype. Such population differentiation can be generated and maintained by both historical demographic events and local adaptation. These evolutionary forces are not mutually exclusive and can in some cases produce nearly identical patterns of genetic differentiation among populations. Here, we investigate the evolutionary forces that generated and maintain clinal variation genome-wide among populations of Drosophila melanogaster sampled in North America and Australia. We contrast patterns of clinal variation in these continents with patterns of differentiation among ancestral European and African populations. Using established and novel methods we derive here, we show that recently derived North America and Australia populations were likely founded by both European and African lineages and that this hybridization event likely contributed to genome-wide patterns of parallel clinal variation between continents. The pervasive effects of admixture mean that differentiation at only several hundred loci can be attributed to the operation of spatially varying selection using an FST outlier approach. Our results provide novel insight into the well-studied system of clinal differentiation in D. melanogaster and provide a context for future studies seeking to identify loci contributing to local adaptation in a wide variety of organisms, including other invasive species as well as temperate endemics.
Molecular Ecology 25(5): 1157-1174 (2016)
0962-1083
http://hdl.handle.net/10261/152570
10.1111/mec.13455
1365-294X
http://dx.doi.org/10.13039/100000002
http://dx.doi.org/10.13039/501100002428
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/100000001
26547394
Adaptation
Drosophila melanogaster
Latitudinal clines
Parallelism
Secondary contact
Secondary contact and local adaptation contribute to genome-wide patterns of clinal variation in Drosophila melanogaster