PhD Thesis: Tracing Molecular Patterns of Adaptation in Arctic Brassicaceae ...
Extreme environments can function as natural laboratories for studying how different organisms adapt to similar selection pressures at the genetic level. This thesis explores how three Arctic plant species independently adapted to some of the coldest biomes on Earth, and how they evolved similar sui...
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| Format: | Dataset |
| Language: | English |
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Dryad
2020
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| Online Access: | https://dx.doi.org/10.5061/dryad.7pvmcvdqx https://datadryad.org/stash/dataset/doi:10.5061/dryad.7pvmcvdqx |
| Summary: | Extreme environments can function as natural laboratories for studying how different organisms adapt to similar selection pressures at the genetic level. This thesis explores how three Arctic plant species independently adapted to some of the coldest biomes on Earth, and how they evolved similar suites of adaptations to extremes in light and temperature. It addresses fundamental questions in plant evolutionary biology, such as the extent to which adaptation follows the same genetic trajectories in different species, and the genetic basis for plant adaptation to extreme environments. The thesis has two main objectives that are addressed through three papers (Papers I-III): 1) estimate the degree of adaptive molecular convergence in the three Arctic Brassicaceae Cardamine bellidifolia, Cochlearia groenlandica, and Draba nivalis, and 2) identify putative molecular adaptations to the Arctic environment in the same three species. Approach. The first two papers examine the degree of evolutionary repeatability in ... |
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