Fitness effects of mutation in natural populations of Arabidopsis thaliana reveal a complex influence of local adaptation.

Autor: Weng ML; Department of Biology and Microbiology, South Dakota State University, Brookings, South Dakota, USA.; Current address: Department of Biology, Westfield State University, Westfield, Massachusettes, USA., Ågren J; Plant Ecology and Evolution, Department of Ecology and Genetics, EBC, Uppsala University, Uppsala, Sweden., Imbert E; Institut des Sciences de la Évolution, Centre National de la Recherche Scientifique, University of Montpellier, Montpellier, France., Nottebrock H; Department of Biology and Microbiology, South Dakota State University, Brookings, South Dakota, USA.; Current address: Plant Ecology, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Universitätsstrasse 30, Bayreuth, Germany., Rutter MT; Department of Biology, College of Charleston, South Carolina, USA., Fenster CB; Department of Biology and Microbiology, South Dakota State University, Brookings, South Dakota, USA.; Oak Lake Field Station, South Dakota State University, Brookings, South Dakota, USA.
Jazyk: angličtina
Zdroj: Evolution; international journal of organic evolution [Evolution] 2021 Feb; Vol. 75 (2), pp. 330-348. Date of Electronic Publication: 2020 Dec 31.
DOI: 10.1111/evo.14152
Abstrakt: Little is empirically known about the contribution of mutations to fitness in natural environments. However, Fisher's Geometric Model (FGM) provides a conceptual foundation to consider the influence of the environment on mutational effects. To quantify mutational properties in the field, we established eight sets of MA lines (7-10 generations) derived from eight founders collected from natural populations of Arabidopsis thaliana from French and Swedish sites, representing the range margins of the species in Europe. We reciprocally planted the MA lines and their founders at French and Swedish sites, allowing us to test predictions of FGM under naturally occurring environmental conditions. The performance of the MA lines relative to each other and to their respective founders confirmed some and contradicted other predictions of the FGM: the contribution of mutation to fitness variance increased when the genotype was in an environment where its fitness was low, that is, in the away environment, but mutations were more likely to be beneficial when the genotype was in its home environment. Consequently, environmental context plays a large role in the contribution of mutations to the evolutionary process and local adaptation does not guarantee that a genotype is at or close to its optimum.
(© 2020 The Authors. Evolution © 2020 The Society for the Study of Evolution.)
Databáze: MEDLINE
Externí odkaz: