| Title: | "Field cricket genome reveals the footprint of recent, abrupt adaptation in the wild" |
| Author(s): | Pascoal S; Risse JE; Zhang X; Blaxter M; Cezard T; Challis RJ; Gharbi K; Hunt J; Kumar S; Langan E; Liu X; Rayner JG; Ritchie MG; Snoek BL; Trivedi U; Bailey NW; |
| Address: | "Department of Zoology University of Cambridge Cambridge CB2 3EJ United Kingdom. Division of Bioinformatics, Department of Plant Sciences Wageningen University & Research Wageningen 6708 PB The Netherlands. Animal Ecology Netherlands Institute of Ecology Wageningen 6700 AB The Netherlands. School of Biology University of St Andrews St Andrews Fife KY16 9TH United Kingdom. Edinburgh Genomics University of Edinburgh Edinburgh EH9 3JT United Kingdom. Institute of Evolutionary Biology University of Edinburgh Edinburgh EH9 3JT United Kingdom. Earlham Institute Norwich Research Park Norwich NR4 7UZ United Kingdom. School of Science and Health and the Hawkesbury Institute for the Environment Western Sydney University Penrith NSW 2751 Australia. Centre for Ecology and Conservation University of Exeter Penryn TR10 9FE United Kingdom. School of Environmental Sciences University of East Anglia Norwich NR4 7UZ United Kingdom. Centre for Genomic Research University of Liverpool Liverpool L69 7ZB United Kingdom. Theoretical Biology and Bioinformatics Utrecht University Utrecht 3584 CH The Netherlands. Terrestrial Ecology Netherlands Institute of Ecology Wageningen 6700 AB The Netherlands" |
| ISSN/ISBN: | 2056-3744 (Electronic) 2056-3744 (Linking) |
| Abstract: | "Evolutionary adaptation is generally thought to occur through incremental mutational steps, but large mutational leaps can occur during its early stages. These are challenging to study in nature due to the difficulty of observing new genetic variants as they arise and spread, but characterizing their genomic dynamics is important for understanding factors favoring rapid adaptation. Here, we report genomic consequences of recent, adaptive song loss in a Hawaiian population of field crickets (Teleogryllus oceanicus). A discrete genetic variant, flatwing, appeared and spread approximately 15 years ago. Flatwing erases sound-producing veins on male wings. These silent flatwing males are protected from a lethal, eavesdropping parasitoid fly. We sequenced, assembled and annotated the cricket genome, produced a linkage map, and identified a flatwing quantitative trait locus covering a large region of the X chromosome. Gene expression profiling showed that flatwing is associated with extensive genome-wide effects on embryonic gene expression. We found that flatwing male crickets express feminized chemical pheromones. This male feminizing effect, on a different sexual signaling modality, is genetically associated with the flatwing genotype. Our findings suggest that the early stages of evolutionary adaptation to extreme pressures can be accompanied by greater genomic and phenotypic disruption than previously appreciated, and highlight how abrupt adaptation might involve suites of traits that arise through pleiotropy or genomic hitchhiking" |
| Keywords: | Adaptation feminization genomics rapid evolution sexual signaling trait loss; |
| Notes: | "PubMed-not-MEDLINEPascoal, Sonia Risse, Judith E Zhang, Xiao Blaxter, Mark Cezard, Timothee Challis, Richard J Gharbi, Karim Hunt, John Kumar, Sujai Langan, Emma Liu, Xuan Rayner, Jack G Ritchie, Michael G Snoek, Basten L Trivedi, Urmi Bailey, Nathan W eng WT_/Wellcome Trust/United Kingdom England 2020/02/15 Evol Lett. 2019 Dec 19; 4(1):19-33. doi: 10.1002/evl3.148. eCollection 2020 Feb" |
