The impact of global selection on local adaptation and reproductive isolation

0531322 - ÚBO 2021 RIV GB eng J - Článek v odborném periodiku
Bisschop, G. - Setter, D. - Rafajlović, M. - Baird, Stuart J. E. - Lohse, K.
The impact of global selection on local adaptation and reproductive isolation.
Philosophical Transactions of the Royal Society B-Biological Sciences. Roč. 375, č. 1806 (2020), č. článku 20190531. ISSN 0962-8436. E-ISSN 1471-2970
Institucionální podpora: RVO:68081766
Klíčová slova: divergent selection * ecological speciation * gene flow * local adaptation * reproductive isolation
Obor OECD: Biology (theoretical, mathematical, thermal, cryobiology, biological rhythm), Evolutionary biology
Impakt faktor: 6.238, rok: 2020
Způsob publikování: Open access
https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.2019.0531

Despite the homogenizing effect of strong gene flow between two populations, adaptation under symmetric divergent selection pressures results in partial reproductive isolation: adaptive substitutions act as local barriers to gene flow, and if divergent selection continues unimpeded, this will result in complete reproductive isolation of the two populations, i.e. speciation. However, a key issue in framing the process of speciation as a tension between local adaptation and the homogenizing force of gene flow is that the mutation process is blind to changes in the environment and therefore tends to limit adaptation. Here we investigate how globally beneficial mutations (GBMs) affect divergent local adaptation and reproductive isolation. When phenotypic divergence is finite, we show that the presence of GBMs limits local adaptation, generating a persistent genetic load at the loci that contribute to the trait under divergent selection and reducing genome-wide divergence. Furthermore, we show that while GBMs cannot prohibit the process of continuous differentiation, they induce a substantial delay in the genome-wide shutdown of gene flow. This article is part of the theme issue 'Towards the completion of speciation: the evolution of reproductive isolation beyond the first barriers'.
Trvalý link: http://hdl.handle.net/11104/0310000