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Following the Dynamics of Structural Variants in Experimentally Evolved Populations
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Published on: February 3, 2023

The evolution of exuberant visible polymorphisms.

Daniel W Franks1, Geoff S Oxford

  • 1York Centre for Complex Systems Analysis, Department of Biology and Department of Computer Science, University of York, York, United Kingdom. df525@york.ac.uk

Evolution; International Journal of Organic Evolution
|June 13, 2009
PubMed
Summary
This summary is machine-generated.

Dietary wariness in predator-prey dynamics significantly boosts genetic polymorphism, even without apostatic selection. This factor is key to understanding the evolution of diverse morphs in wild populations.

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Area of Science:

  • Evolutionary Biology
  • Population Genetics
  • Behavioral Ecology

Background:

  • Visible genetic polymorphism is widespread in nature, but its maintenance mechanisms are often unclear.
  • Apostatic selection has been frequently proposed to explain the persistence of multiple morphs within a species.

Purpose of the Study:

  • To investigate predator-prey relationship features that promote extensive genetic polymorphism using individual-based models.
  • To evaluate the roles of apostatic selection, dietary wariness, and predation intensity in maintaining polymorphism.

Main Methods:

  • Development and analysis of individual-based evolutionary models simulating predator-prey interactions.
  • Exploration of scenarios with varying levels of apostatic selection, morph visibility, dietary wariness, and predation intensity.

Main Results:

  • Apostatic selection increases morph number, but results in a relatively small number of morphs.
  • Dietary wariness substantially increases morph diversity, even in the absence of apostatic selection.
  • Reduced predation intensity generally enhances the number of evolved morphs across models.

Conclusions:

  • Dietary wariness is a critical factor for maintaining exuberant polymorphisms, potentially resolving a long-standing evolutionary puzzle.
  • Apostatic selection is not essential for the maintenance of extensive polymorphisms; dietary wariness offers a more comprehensive explanation.