Rapid Parallel Adaptation to Anthropogenic Heavy Metal Pollution
| Autor: | Michael F. Fay, Andrew J. Helmstetter, Luke T. Dunning, Rhian J. Smith, Jackie Lighten, Owen G. Osborne, Daniel P. Wood, Laurence Mason, Aaron A. Comeault, Andrew D. Foote, Joe Parker, Alexander S. T. Papadopulos, Edward A. Straw |
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| Rok vydání: | 2021 |
| Předmět: |
Silene uniflora
parallel evolution 0106 biological sciences Environmental change Population Biology AcademicSubjects/SCI01180 010603 evolutionary biology 01 natural sciences Gene flow 03 medical and health sciences Metals Heavy Genetics Humans Allele education rapid evolution Molecular Biology Selection (genetic algorithm) Discoveries Ecology Evolution Behavior and Systematics 030304 developmental biology Ecotype 0303 health sciences education.field_of_study Ecology Genetic Drift AcademicSubjects/SCI01130 Replicate biology.organism_classification Adaptation Physiological Genetic architecture Evolutionary biology Adaptation Parallel evolution heavy metal tolerance Environmental Pollution |
| Zdroj: | Molecular Biology and Evolution (MBE) Molecular Biology and Evolution |
| ISSN: | 1537-1719 |
| Popis: | The impact of human-mediated environmental change on the evolutionary trajectories of wild organisms is poorly understood. In particular, species’ capacities to adapt rapidly (in hundreds of generations or less), reproducibly and predictably to extreme environmental change is unclear. Silene uniflora is predominantly a coastal species, but it has also colonised isolated, disused mines with phytotoxic, zinc-contaminated soils. To test whether rapid, parallel adaptation to anthropogenic pollution has taken place, we used reduced representation sequencing (ddRAD) to reconstruct the evolutionary history of geographically proximate mine and coastal population pairs and found largely independent colonisation of mines from different coastal sites. Furthermore, our results show that parallel evolution of zinc tolerance has occurred without gene flow spreading adaptive alleles between mine populations. In genomic regions where signatures of selection were detected across multiple mine-coast pairs, we identified genes with functions linked to physiological differences between the putative ecotypes, although genetic differentiation at specific loci is only partially shared between mine populations. Our results are consistent with a complex, polygenic genetic architecture underpinning rapid adaptation. This shows that even under a scenario of strong selection and rapid adaptation, evolutionary responses to human activities (and other environmental challenges) may be idiosyncratic at the genetic level and, therefore, difficult to predict from genomic data. © The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Databáze: | OpenAIRE |
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