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EVOLUTIONARY BIOLOGY

Self-fertilization and 1 inbreeding limit the scope for sexual antagonism

Samuel J. Tazzyman, Jessica K. Abbott
doi: https://doi.org/10.1101/009365
Samuel J. Tazzyman
1Theoretical Biology Group, Institute of Integrative Biology, ETH Zurich, Universitatstrasse 16, 8092 Zurich, Switzerland. Email:
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Jessica K. Abbott
3Section for Evolutionary Ecology, Department of Biology, Lund University, Solvegatan 37, 22362 Lund, Sweden. Email:
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Abstract

Sexual antagonism occurs when there is a positive intersexual genetic correlation in trait expression but opposite fitness effects of the trait(s) in males and females. As such, it constrains the evolution of sexual dimorphism and may therefore have implications for adaptive evolution. There is currently considerable evidence for the existence of sexually antagonistic genetic variation in laboratory and natural populations, but how sexual antagonism interacts with other evolutionary phenomena is still poorly understood in many cases. Here we explore how self-fertilization and inbreeding affect the maintenance of polymorphism for sexually antagonistic loci. We expected a priori that selfing should reduce the region of polymorphism, since inbreeding reduces the frequency of heterozygotes and speeds fixation. Although this expectation was supported, our results show that there is an interactive effect between the degree of selfing and dominance such that those segregating sexually antagonistic loci that do exist are more likely to be partially dominant. In addition, inbreeding effects may influence population persistence and genomic location of sexually antagonistic loci in separate-sexed organisms.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. All rights reserved. No reuse allowed without permission.
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Posted September 18, 2014.
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Self-fertilization and 1 inbreeding limit the scope for sexual antagonism
Samuel J. Tazzyman, Jessica K. Abbott
bioRxiv 009365; doi: https://doi.org/10.1101/009365
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Self-fertilization and 1 inbreeding limit the scope for sexual antagonism
Samuel J. Tazzyman, Jessica K. Abbott
bioRxiv 009365; doi: https://doi.org/10.1101/009365

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