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Joint evolution of dispersal and inbreeding load
Frédéric Guillaume1, Nicolas Perrin
1Department of Ecology and Evolution, University of Lausanne, CH-1015 Lausanne, Switzerland. guillaum@zoology.ubc.ca
Genetics
|March 3, 2006
Summary
Inbreeding avoidance influences dispersal, but deleterious mutations have a limited role. Mildly recessive mutations can promote dispersal through heterosis, while slightly recessive ones increase mutational load.
Area of Science:
- Evolutionary Biology
- Population Genetics
- Behavioral Ecology
Background:
- Inbreeding avoidance is a key factor in dispersal patterns.
- Theoretical models often assume constant inbreeding load, but it dynamically evolves.
Purpose of the Study:
- To investigate the joint evolution of dispersal and inbreeding load.
- To assess the role of deleterious mutations in the evolution of dispersal.
Main Methods:
- Individual-based stochastic simulations were employed.
- The study allowed for the joint evolution of dispersal and inbreeding load.
Main Results:
- Strongly deleterious mutations have minimal impact due to low genomic mutation rates.
- Mildly deleterious, strongly recessive mutations can drive dispersal via heterosis.
- Slightly recessive mutations increase mutational load and promote population fluctuations, indirectly favoring dispersal.
Conclusions:
- Deleterious mutations have a limited impact on dispersal evolution under realistic parameters.
- Dispersal evolution is primarily influenced by kin competition, with mutations having a secondary effect.
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