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Genetics, Vol. 167, 1537-1546, August 2004, Copyright © 2004
doi:10.1534/genetics.103.026211
Intralocus Sexual Conflict Can Drive the Evolution of Genomic Imprinting
Troy Day*,1 and
Russell Bonduriansky
* Departments of Mathematics and Biology, Queen's University, Kingston, Ontario K7L 3N6, Canada
Department of Zoology, University of Toronto, Toronto, Ontario M5S 3G5, Canada
1 Corresponding author: Departments of Mathematics and Biology, Jeffery Hall, Queen's University, Kingston, ON K7L 3N6, Canada.
E-mail: tday{at}mast.queensu.ca
Genomic imprinting is a phenomenon whereby the expression of an allele differs depending upon its parent of origin. There is an increasing number of examples of this form of epigenetic inheritance across a wide range of taxa, and imprinting errors have also been implicated in several human diseases. Various hypotheses have been put forward to explain the evolution of genomic imprinting, but there is not yet a widely accepted general hypothesis for the variety of imprinting patterns observed. Here a new evolutionary hypothesis, based on intralocus sexual conflict, is proposed. This hypothesis provides a potential explanation for much of the currently available empirical data, and it also makes new predictions about patterns of genomic imprinting that are expected to evolve but that have not, as of yet, been looked for in nature. This theory also provides a potential mechanism for the resolution of intralocus sexual conflict in sexually selected traits and a novel pathway for the evolution of sexual dimorphism.
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