The Evolution of Plastic Recombination

Empirical data suggest that recombination rates may change in response to stress. To study the evolution of plastic recombination, we develop a modifier model using the same theoretical framework used to study conventional (nonplastic) modifiers, thus allowing direct comparison. We examine the evolu...

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Bibliographic Details
Published inGenetics (Austin) Vol. 171; no. 2; pp. 803 - 812
Main Authors Agrawal, Aneil F, Hadany, Lilach, Otto, Sarah P
Format Journal Article
LanguageEnglish
Published United States Genetics Soc America 01.10.2005
Genetics Society of America
Copyright © 2005 by the Genetics Society of America
Subjects
Evolution
Evolution, Molecular
Genetic recombination
Genetics
Investigations
Models, Genetic
Ploidies
Recombination, Genetic - genetics
Selection, Genetic
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Summary:Empirical data suggest that recombination rates may change in response to stress. To study the evolution of plastic recombination, we develop a modifier model using the same theoretical framework used to study conventional (nonplastic) modifiers, thus allowing direct comparison. We examine the evolution of plastic recombination in both haploid and diploid systems. In haploids, a plastic modifier spreads by forming associations with selectively favored alleles. Relative to nonplastic effects, selection on the plastic effects of a modifier is both much stronger and less sensitive to the specifics of the selection regime (e.g., epistasis). In contrast, the evolution of plastic recombination in diploids is much more restricted. Selection on plasticity requires the ability to detect DNA damage or cis-trans effects as may occur through maternal effects on fitness.
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Communicating editor: H. G. Spencer
Corresponding author: Department of Zoology, University of Toronto, 25 Harbord St., Toronto, ON M5S 3G5, Canada. E-mail: afagrawal@zoo.utoronto.ca
ISSN:0016-6731
1943-2631
1943-2631
DOI:10.1534/genetics.105.041301