The genomic footprint of climate adaptation in Chironomus riparius

Molecular Ecology
Ann-Marie WaldvogelMarkus Pfenninger

Abstract

The gradual heterogeneity of climatic factors poses varying selection pressures across geographic distances that leave signatures of clinal variation in the genome. Separating signatures of clinal adaptation from signatures of other evolutionary forces, such as demographic processes, genetic drift and adaptation, to nonclinal conditions of the immediate local environment is a major challenge. Here, we examine climate adaptation in five natural populations of the harlequin fly Chironomus riparius sampled along a climatic gradient across Europe. Our study integrates experimental data, individual genome resequencing, Pool-Seq data and population genetic modelling. Common-garden experiments revealed significantly different population growth rates at test temperatures corresponding to the population origin along the climate gradient, suggesting thermal adaptation on the phenotypic level. Based on a population genomic analysis, we derived empirical estimates of historical demography and migration. We used an FST outlier approach to infer positive selection across the climate gradient, in combination with an environmental association analysis. In total, we identified 162 candidate genes as genomic basis of climate adaptation. Enriched...Continue Reading

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Citations

Feb 9, 2020·Biological Reviews of the Cambridge Philosophical Society·Daniel González-TokmanFabricio Villalobos
Feb 16, 2020·G3 : Genes - Genomes - Genetics·Hanno SchmidtMarkus Pfenninger
Jun 27, 2020·International Journal of Systematic and Evolutionary Microbiology·Yeon Bee KimSeong Woon Roh
Jan 9, 2019·Ecology and Evolution·Quentin FoucaultMarkus Pfenninger
Feb 15, 2020·Evolution Letters·Ann-Marie WaldvogelMarkus Pfenninger
Nov 8, 2019·Current Opinion in Insect Science·Michael E Dillon, Jeffrey D Lozier
Nov 18, 2020·Journal of Evolutionary Biology·Juliane HartkeBarbara Feldmeyer
Apr 6, 2021·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Luis J ChuecaMarkus Pfenninger
Aug 18, 2021·ELife·Lisa I CouperErin A Mordecai
Jul 25, 2021·Genome Research·Ann-Marie Waldvogel, Markus Pfenninger

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