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Following the Dynamics of Structural Variants in Experimentally Evolved Populations
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Inversions and parallel evolution.

Anja M Westram1,2, Rui Faria3,4,5, Kerstin Johannesson6

  • 1ISTA (Institute of Science and Technology Austria), Klosterneuburg, Austria.

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|June 13, 2022
PubMed
Summary
This summary is machine-generated.

Chromosomal inversions can accelerate parallel evolution by enhancing selection, aiding local adaptation. Further research is needed across diverse species to understand their full impact on evolutionary genomics.

Keywords:
chromosomal rearrangementsgene flowlocal adaptationparallel evolutionsupergenes

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Area of Science:

  • Evolutionary Genomics
  • Population Genetics
  • Speciation

Background:

  • Local adaptation drives population divergence within species.
  • Similar environmental pressures can lead to parallel phenotypic evolution.
  • Genetic architectures, such as chromosomal inversions, influence local adaptation by maintaining favorable allele combinations.

Purpose of the Study:

  • To investigate the role of chromosomal inversions in parallel evolution.
  • To highlight knowledge gaps regarding inversions and parallel adaptation.
  • To compare genomic architectures with and without inversions using modeling.

Main Methods:

  • Review of existing studies on chromosomal inversions and adaptation.
  • Development of simple models to illustrate differences in genomic architectures.
  • Analysis of theoretical predictions for parallel adaptation with and without inversions.

Main Results:

  • Chromosomal inversions can potentially speed up parallel adaptive processes.
  • Inversions may enable parallel adaptation in scenarios where it would otherwise be impossible.
  • The effect of inversions on parallel adaptation is highly dependent on the spatial setting.

Conclusions:

  • Chromosomal inversions may play a significant role in parallel evolution, but their impact is context-dependent.
  • Further empirical studies are required across a broader taxonomic range.
  • Understanding the relative importance of inversions compared to non-inversion regions is crucial for evolutionary genomics.