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Data from: Evolutionarily stable sex ratios and mutation load Hough, Josh; Immler, Simone; Barrett, Spencer C. H.; Otto, Sarah P.

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<b>Abstract</b><br/>Frequency-dependent selection should drive dioecious populations toward a 1:1 sex ratio, but biased sex ratios are widespread, especially among plants with sex chromosomes. Here, we develop population genetic models to investigate the relationships between evolutionarily stable sex ratios, haploid selection, and deleterious mutation load. We confirm that when haploid selection acts only on the relative fitness of X and Y-bearing pollen and the sex ratio is controlled by the maternal genotype, seed sex ratios evolve toward 1:1. When we also consider haploid selection acting on deleterious mutations, however, we find that biased sex ratios can be stably maintained, reflecting a balance between the advantages of purging deleterious mutations via haploid selection, and the disadvantages of haploid selection on the sex ratio. Our results provide a plausible evolutionary explanation for biased sex ratios in dioecious plants, given the extensive gene expression that occurs across plant genomes at the haploid stage.; <b>Usage notes</b><br /><div class="o-metadata__file-usage-entry"><h4 class="o-heading__level3-file-title">Hough et al. (2013). SupMat - Jan14</h4><div class="o-metadata__file-name"></div></div>

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Title	Data from: Evolutionarily stable sex ratios and mutation load
Creator	Hough, Josh; Immler, Simone; Barrett, Spencer C. H.; Otto, Sarah P.
Date Issued	2021-05-19
Description	<b>Abstract</b><br/>Frequency-dependent selection should drive dioecious populations toward a 1:1 sex ratio, but biased sex ratios are widespread, especially among plants with sex chromosomes. Here, we develop population genetic models to investigate the relationships between evolutionarily stable sex ratios, haploid selection, and deleterious mutation load. We confirm that when haploid selection acts only on the relative fitness of X and Y-bearing pollen and the sex ratio is controlled by the maternal genotype, seed sex ratios evolve toward 1:1. When we also consider haploid selection acting on deleterious mutations, however, we find that biased sex ratios can be stably maintained, reflecting a balance between the advantages of purging deleterious mutations via haploid selection, and the disadvantages of haploid selection on the sex ratio. Our results provide a plausible evolutionary explanation for biased sex ratios in dioecious plants, given the extensive gene expression that occurs across plant genomes at the haploid stage.; <b>Usage notes</b><br /><div class="o-metadata__file-usage-entry"><h4 class="o-heading__level3-file-title">Hough et al. (2013). SupMat - Jan14</h4><div class="o-metadata__file-name"></div></div>
Subject	Other; sex-ratio evolution; mutation load; gametophytic selection; heteromorphic sex chromosomes; evolutionarily stable strategy; plant life cycles
Type	Dataset
Notes	Dryad version number: 1</p> Version status: submitted</p> Dryad curation status: Published</p> Sharing link: https://datadryad.org/stash/share/8uci35jFwT_v-eDAEj0L5GFFXkGmcH-L4pEt1yx4oOI</p> Storage size: 776092</p> Visibility: public</p>
Date Available	2020-06-24
Provider	University of British Columbia Library
License	This dataset is made available under a Creative Commons CC0 license with the following additional/modified terms and conditions: CC0 Waiver
DOI	10.14288/1.0397959
URI	https://doi.org/10.5683/SP2/VFCNJ6
Publisher DOI	https://doi.org/10.5683/SP2/VFCNJ6; https://doi.org/10.5061/dryad.74tg7
Rights URI	https://creativecommons.org/publicdomain/zero/1.0/
Aggregated Source Repository	Dataverse

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This dataset is made available under a Creative Commons CC0 license with the following additional/modified terms and conditions: CC0 Waiver