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Summary: The origin of interlocus sexual conflict: is sex-linkage important?
J. A. ANDRE´ S* & E. H. MORROW
*Evolutionary Biology Research Group, Department of Ecology and Animal Biology, Universidad de Vigo, Campus Universitario, Spain
Department of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
Keywords:
sex-limited trait;
sex-linkage;
sexually antagonistic coevolution;
threshold model.
Abstract
Sexual conflict has been proposed as a potential selective agent in the
evolution of a variety of traits. Here, we present a simple model that
investigates the initial conditions under which sex-linked and sex-limited
harming alleles can invade a population. In this paper, we expand previous
threshold models to study how sex-linkage and sex determination mecha-
nisms affect the spreading conditions of a harming allele. Our models provide
new insights into how sexual conflict could originate, showing that in diploid
organisms the probability of a new harming allele spreading is independent of
both the genetic sex determination system and the dominance relationships.
However, the incidence of interlocus sexual conflicts in the initial steps of the
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