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No support for intra-nor inter-locus sexual conflict over mating latency and copulation duration in a polyandrous fruit fly

View ORCID ProfileJulie M. Collet, View ORCID ProfileJacqueline L Sztepanacz
doi: https://doi.org/10.1101/2020.10.18.344390
Julie M. Collet
1CEFE, Univ Montpellier, CNRS, EPHE, IRD, Univ Paul Valery Montpellier 3, Montpellier, France
2School of Biological Sciences, The University of Queensland, Brisbane, St. Lucia Queensland 4072, Australia
3CBGP, INRAE, IRD, CIRAD, Institut Agro, Univ Montpellier, Montpellier, France
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  • For correspondence: j.collet@uq.edu.au
Jacqueline L Sztepanacz
4Department of Biology, University of Ottawa, Ottawa, Canada
5Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Canada
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  • For correspondence: jsztepanacz@gmail.com
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Abstract

The total strength of sexual selection on males depends on the relationship between various components of pre- and post-copulatory fitness. Misalignment between male and female interests creates inter-locus sexual conflict, where the fitness of one sex is increased at the expense of the other. Although rarely considered, mating behaviours can also be genetically correlated between males and females, creating intra-locus sexual conflict, where beneficial alleles in one sex are costly when expressed in the other sex. How inter- and intra-locus sexual conflicts operate on the expression of mating behaviours remains little understood. Here, we study male attractiveness, mating latency and copulation duration in two populations of the polyandrous Drosophila serrata. Univariate analyses show little genetic variance in mating latency, and that males, but not females, contribute to copulation duration genetic variance. Further, multivariate analyses revealed little covariance between the studied traits. However, analyses considering male and female contribution in a single framework supported genetic contributions from both sexes for mating behaviours and complex patterns of between sexes correlations. Finally, our study did not find any association between those mating behaviours and fitness component, specifically (i) no phenotypic covariance between male attractiveness and mating latency and, (ii) longer copulations did not result in the production of more offspring. With no detectable fitness benefits in any sexes for shorter mating latency or longer copulation duration, our results do not support the presence of inter-nor intra-locus sexual conflict for these mating traits.

Competing Interest Statement

The authors have declared no competing interest.

Footnotes

  • Conflict of Interest: The authors declare no conflict of interest.

Copyright 
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 October 18, 2020.
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No support for intra-nor inter-locus sexual conflict over mating latency and copulation duration in a polyandrous fruit fly
Julie M. Collet, Jacqueline L Sztepanacz
bioRxiv 2020.10.18.344390; doi: https://doi.org/10.1101/2020.10.18.344390
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No support for intra-nor inter-locus sexual conflict over mating latency and copulation duration in a polyandrous fruit fly
Julie M. Collet, Jacqueline L Sztepanacz
bioRxiv 2020.10.18.344390; doi: https://doi.org/10.1101/2020.10.18.344390

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