A1 Journal article (refereed)
The Demographic Costs of Sexually Antagonistic Selection in Partially Selfing Populations (2022)

Olito, C., & de Vries, C. (2022). The Demographic Costs of Sexually Antagonistic Selection in Partially Selfing Populations. American Naturalist, 200(3), 401-418. https://doi.org/10.1086/720419

JYU authors or editors

Publication details

All authors or editors: Olito, Colin; de Vries, Charlotte

Journal or series: American Naturalist

ISSN: 0003-0147

eISSN: 1537-5323

Publication year: 2022

Publication date: 01/09/2022

Volume: 200

Issue number: 3

Pages range: 401-418

Publisher: University of Chicago Press

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1086/720419

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/82834

Abstract

When selection differs between the sexes, genes expressed by both males and females can experience sexually antagonistic (SA) selection, where beneficial alleles for one sex are deleterious for the other. Classic population genetics theory has been fundamental to understanding how and when SA genetic variation can be maintained by balancing selection, but these models have rarely considered the demographic consequences of coexisting alleles with deleterious fitness effects in each sex. In this article, we develop a stage-structured Mendelian matrix model and jointly analyze the evolutionary and demographic consequences of SA selection in obligately outcrossing (i.e., dioecious/gonochorous) and partially selfing hermaphrodite populations. We focus on identifying when SA polymorphisms are maintained by balancing selection and the population growth rate remains positive. Additionally, we analyze the effects of inbreeding depression manifesting at different life history stages and give an illustrative example of the potential for SA polymorphism in real populations using empirically estimated demographic rates for the hermaphroditic flowering plant Mimulus guttatus. Our results show that when population intrinsic growth rates approach 1, extinction occurs across large swathes of parameter space, favoring SA polymorphism or the fixation of male-beneficial alleles, and that inbreeding depression is a significant problem for maintaining SA polymorphism in partially selfing populations. Despite these demographic challenges, our example with M. guttatus appears to show that demographic rates observed in some real populations can sustain large regions of viable SA polymorphic space.

Keywords: population genetics; natural selection; asexual reproduction; sexual reproduction; hermaphroditism; inbreeding; plants

Free keywords: intralocus sexual conflict; evolutionary demography; partial selfing; inbreeding depression; polymorphism; Mimulus guttatus

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Ministry reporting: Yes

Reporting Year: 2022

JUFO rating: 3