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Abundant multilocus polymorphisms caused by genetic interaction between species on trait-for-trait basis
V M Kirzhner1, A B Korol, E Nevo
1Institute of Evolution, University of Haifa, Mount Carmel, Haifa 31905, Israel.
Journal of Theoretical Biology
|May 18, 1999
Summary
This study reveals that realistic genetic models, including non-additive gene effects, promote genetic polymorphism in coevolving species. Understanding isolated species behavior predicts conditions for maintaining diversity in interacting populations.
Area of Science:
- Evolutionary biology
- Population genetics
- Quantitative genetics
Background:
- Species coevolution is often driven by selection on quantitative traits.
- Mendelian genetics provides a framework for understanding trait inheritance.
- Polymorphism maintenance is crucial for evolutionary adaptation but challenging to model.
Purpose of the Study:
- To investigate conditions for polymorphism maintenance in species coevolution.
- To link conditions for interacting species to isolated species behavior.
- To explore the evolution of sex and recombination within a Mendelian framework.
Main Methods:
- Development of a genetic model for species coevolution.
- Analysis of trait-dependent coevolutionary dynamics.
- Examination of Mendelian gene action, including non-additive effects.
Main Results:
- Conditions for polymorphism maintenance in interacting species can be predicted from isolated species dynamics.
- A variety of polymorphic regimes were identified in the proposed genetic model.
- Non-equal gene effects and deviations from additive gene action promote genetic polymorphism.
Conclusions:
- Trait-dependent coevolution significantly influences the maintenance of genetic polymorphism.
- Realistic genetic models, incorporating complex gene interactions, are essential for understanding evolutionary dynamics.
- The Mendelian genetic model provides insights into the evolution of sex and recombination.