Fitness effects of mutation in natural populations of Arabidopsis thaliana reveal a complex influence of local adaptation
| Autor: | Jon Ågren, Eric Imbert, Mao-Lun Weng, Henning Nottebrock, Charles B. Fenster, Matthew T. Rutter |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Genotype Range (biology) Adaptation Biological Arabidopsis Context (language use) Biology 010603 evolutionary biology 01 natural sciences Natural (archaeology) 03 medical and health sciences Stress Physiological Genetics Arabidopsis thaliana Ecology Evolution Behavior and Systematics Ecosystem Local adaptation biology.organism_classification Biological Evolution 030104 developmental biology Evolutionary biology Mutation (genetic algorithm) Fisher's geometric model Mutation Genetic Fitness General Agricultural and Biological Sciences |
| Zdroj: | Evolution; international journal of organic evolutionLITERATURE CITED. 75(2) |
| ISSN: | 1558-5646 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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