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The genomic consequences of selection across development.

Maddie E James1,2, Daniel Ortiz-Barrientos1,2

  • 1School of the Environment, The University of Queensland, St Lucia, QLD, Australia.

Molecular Ecology
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Natural selection drives ecotypic divergence in prairie sunflowers across life stages. Chromosomal inversions play a key role in this divergence, even with gene flow, advancing our understanding of evolution.

Keywords:
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Area of Science:

  • Evolutionary biology
  • Ecology
  • Genetics

Background:

  • Natural selection is a primary driver of biological diversification.
  • Organismal development involves multiple stages, each influenced by genetic and environmental factors.
  • Different life stages may be regulated by distinct sets of genes and alleles.

Purpose of the Study:

  • To investigate the role of natural selection in ecotypic divergence across various life history stages.
  • To examine fitness variations and allele frequency changes throughout development.
  • To understand how chromosomal inversions contribute to divergence despite gene flow.

Main Methods:

  • Reciprocal transplant experiments were conducted.
  • Demographic models were employed to analyze population dynamics.
  • Genomic sequencing was utilized to assess genetic variation.

Main Results:

  • Natural selection significantly impacts population divergence across multiple life history stages.
  • Allele frequency changes were observed and evaluated across developmental stages.
  • The study identified a role for chromosomal inversions in ecotypic divergence.

Conclusions:

  • Natural selection shapes ecotypic divergence at different life history stages.
  • Chromosomal inversions are important in the process of ecological divergence.
  • The findings enhance our understanding of evolutionary processes in the presence of gene flow.