Strong sexual selection in males against a mutation load that reduces offspring production in seed beetles

Grieshop, K. ORCID:, Stångberg, J., Martinossi-Allibert, I., Arnqvist, G. and Berger, D. (2016) Strong sexual selection in males against a mutation load that reduces offspring production in seed beetles. Journal of Evolutionary Biology, 29 (6). pp. 1201-1210. ISSN 1010-061X

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Theory predicts that sexual reproduction can increase population viability relative to asexual reproduction by allowing sexual selection in males to remove deleterious mutations from the population without large demographic costs. This requires that selection acts more strongly in males than females and that mutations affecting male reproductive success have pleiotropic effects on population productivity, but empirical support for these assumptions is mixed. We used the seed beetle Callosobruchus maculatus to implement a three-generation breeding design where we induced mutations via ionizing radiation (IR) in the F0 generation and measured mutational effects (relative to nonirradiated controls) on an estimate of population productivity in the F1 and effects on sex-specific competitive lifetime reproductive success (LRS) in the F2 . Regardless of whether mutations were induced via F0 males or females, they had strong negative effects on male LRS, but a nonsignificant influence on female LRS, suggesting that selection is more efficient in removing deleterious alleles in males. Moreover, mutations had seemingly shared effects on population productivity and competitive LRS in both sexes. Thus, our results lend support to the hypothesis that strong sexual selection on males can act to remove the mutation load on population viability, thereby offering a benefit to sexual reproduction.

Item Type: Article
Additional Information: Funding Information: This research was supported by the European Research Council (GENCON AdG-294333; to GA), the Swedish Research Council (621-2010-5266, to GA) and the Stiftelsen för Zoologisk Forskning (to KG). We thank Johanna Liljestrand-Rönn for help with experiments. We thank Bo Stenerlöw for access to the irradiation facilities. Publisher Copyright: © 2016 European Society For Evolutionary Biology. Journal of Evolutionary Biology © 2016 European Society For Evolutionary Biology.
Uncontrolled Keywords: adaptation,genetic correlation,intralocus sexual conflict,pleiotropy,population viability,sexual antagonism,sexual selection,ecology, evolution, behavior and systematics ,/dk/atira/pure/subjectarea/asjc/1100/1105
Faculty \ School: Faculty of Science > School of Biological Sciences
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Depositing User: LivePure Connector
Date Deposited: 07 Oct 2023 01:24
Last Modified: 07 Oct 2023 01:24
DOI: 10.1111/jeb.12862

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