title: Inbreeding alters intersexual fitness correlations in Drosophila simulans.
abstract: Intralocus sexual conflict results from sexually antagonistic selection on traits shared by the sexes. This can displace males and females from their respective fitness optima, and negative intersexual correlations (r mf) for fitness are the unequivocal indicator of this evolutionary conflict. It has recently been suggested that intersexual fitness correlations can vary depending on the segregating genetic variation present in a population, and one way to alter genetic variation and test this idea is via inbreeding. Here, we test whether intersexual correlations for fitness vary with inbreeding in Drosophila simulans isolines reared under homogenous conditions. We measured male and female fitness at different times following the establishment of isofemale lines and found that the sign of the association between the two measures varied with time after initial inbreeding. Our results are consistent with suggestions that the type of genetic variation segregating within a population can determine the extent of intralocus sexual conflict and also support the idea that sexually antagonistic alleles segregate for longer in populations than alleles with sexually concordant effects.
authors.affiliation: Institute of Environmental Science, Jagiellonian University Gronostawa 7, Krakow, Poland.
authors.forename: Eoin
authors.initials: E
authors.lastname: Duffy
authors.affiliation: Institute of Environmental Science, Jagiellonian University Gronostawa 7, Krakow, Poland.
authors.forename: Richa
authors.initials: R
authors.lastname: Joag
authors.affiliation: Institute of Environmental Science, Jagiellonian University Gronostawa 7, Krakow, Poland.
authors.forename: Jacek
authors.initials: J
authors.lastname: Radwan
authors.affiliation: Centre for Ecology & Conservation, University of Exeter Tremough, Penryn, TR10 9FE, U.K.
authors.forename: Nina
authors.initials: N
authors.lastname: Wedell
authors.affiliation: Centre for Ecology & Conservation, University of Exeter Tremough, Penryn, TR10 9FE, U.K.
authors.forename: David J
authors.initials: DJ
authors.lastname: Hosken
keywords: Drosophila simulans; inbreeding; intralocus sexual conflict; ontogenetic conflict