speaker: Dr Rhonda Snook
(University of Sheffield, Dept. Animal and Plant Sciences)
building: Harold Mitchell
room: Dyers Brae Seminar Room
see also: additional details
host/contact: Dr Maria Dornelas
Understanding adaptive evolution is critical to predicting how organisms will respond to changes in abiotic and biotic conditions. Phenotypic and genotypic clinal variation is a hallmark of local adaptation in response to some spatial environmental gradient, typically temperature. The increasingly wide use of next generation sequencing has resulted in greater understanding of how both gene sequences and gene expression can change under different conditions across geographic scales, however, such studies typically have been restricted to the clinal ends, and/or not performed in situ (e.g. performed in the laboratory on lab adapted populations), and/or not on populations from their original distribution. Here we combat these issues by testing for signatures of local adaptation in gene expression in both a common garden controlled laboratory experiment and the use of caged in situ populations of male Drosophila subobscura from six populations across its native European latitudinal cline to identify signatures of local adaptation to spatially varying thermal selection. We identify genetic, cellular and tissue targets of selection, finding that southern and northern populations specialize in different responses.