The effect of sex on the repeatability of evolution in different environments
| Autor: | Nick Colegrave, Josianne Lachapelle |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Experimental evolution education.field_of_study Ecology Population Repeatability Biology 010603 evolutionary biology 01 natural sciences Adaptive functioning 03 medical and health sciences 030104 developmental biology Genetics General Agricultural and Biological Sciences education Ecology Evolution Behavior and Systematics Genetic composition Selection (genetic algorithm) |
| Zdroj: | Evolution. 71:1075-1087 |
| ISSN: | 0014-3820 |
| DOI: | 10.1111/evo.13198 |
| Popis: | The adaptive function of sex has been extensively studied, while less consideration has been given to the potential downstream consequences of sex on evolution. Here, we investigate one such potential consequence, the effect of sex on the repeatability of evolution. By affecting the repeatability of evolution, sex could have important implications for biodiversity, and for our ability to make predictions about the outcome of environmental change. We allowed asexual and sexual populations of Chlamydomonas reinhardtii to evolve in novel environments and monitored both their change in fitness and variance in fitness after evolution. Sex affected the repeatability of evolution by changing the importance of the effect of selection, chance, and ancestral constraints on the outcome of the evolutionary process. In particular, the effects of sex were highly dependent on the initial genetic composition of the population and on the environment. Given the lack of a consistent effect of sex on repeatability across the environments used here, further studies to dissect in more detail the underlying reasons for these differences as well as studies in additional environments are required if we are to have a general understanding of the effects of sex on the repeatability of evolution. |
| Databáze: | OpenAIRE |
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