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Direct and indirect effects of male genital elaboration in female seed beetles
Our understanding of coevolution between male genitalia and female traits remains incomplete. This is perhaps especially true for genital traits that cause internal injuries in females, such as the spiny genitalia of seed beetles where males with relatively long spines enjoy a high relative fertiliz...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8261210/ https://www.ncbi.nlm.nih.gov/pubmed/34229496 http://dx.doi.org/10.1098/rspb.2021.1068 |
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author | Arnqvist, Göran Grieshop, Karl Hotzy, Cosima Rönn, Johanna Polak, Michal Rowe, Locke |
author_facet | Arnqvist, Göran Grieshop, Karl Hotzy, Cosima Rönn, Johanna Polak, Michal Rowe, Locke |
author_sort | Arnqvist, Göran |
collection | PubMed |
description | Our understanding of coevolution between male genitalia and female traits remains incomplete. This is perhaps especially true for genital traits that cause internal injuries in females, such as the spiny genitalia of seed beetles where males with relatively long spines enjoy a high relative fertilization success. We report on a new set of experiments, based on extant selection lines, aimed at assessing the effects of long male spines on females in Callosobruchus maculatus. We first draw on an earlier study using microscale laser surgery, and demonstrate that genital spines have a direct negative (sexually antagonistic) effect on female fecundity. We then ask whether artificial selection for long versus short spines resulted in direct or indirect effects on female lifetime offspring production. Reference females mating with males from long-spine lines had higher offspring production, presumably due to an elevated allocation in males to those ejaculate components that are beneficial to females. Remarkably, selection for long male genital spines also resulted in an evolutionary increase in female offspring production as a correlated response. Our findings thus suggest that female traits that affect their response to male spines are both under direct selection to minimize harm but are also under indirect selection (a good genes effect), consistent with the evolution of mating and fertilization biases being affected by several simultaneous processes. |
format | Online Article Text |
id | pubmed-8261210 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Royal Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-82612102021-07-21 Direct and indirect effects of male genital elaboration in female seed beetles Arnqvist, Göran Grieshop, Karl Hotzy, Cosima Rönn, Johanna Polak, Michal Rowe, Locke Proc Biol Sci Evolution Our understanding of coevolution between male genitalia and female traits remains incomplete. This is perhaps especially true for genital traits that cause internal injuries in females, such as the spiny genitalia of seed beetles where males with relatively long spines enjoy a high relative fertilization success. We report on a new set of experiments, based on extant selection lines, aimed at assessing the effects of long male spines on females in Callosobruchus maculatus. We first draw on an earlier study using microscale laser surgery, and demonstrate that genital spines have a direct negative (sexually antagonistic) effect on female fecundity. We then ask whether artificial selection for long versus short spines resulted in direct or indirect effects on female lifetime offspring production. Reference females mating with males from long-spine lines had higher offspring production, presumably due to an elevated allocation in males to those ejaculate components that are beneficial to females. Remarkably, selection for long male genital spines also resulted in an evolutionary increase in female offspring production as a correlated response. Our findings thus suggest that female traits that affect their response to male spines are both under direct selection to minimize harm but are also under indirect selection (a good genes effect), consistent with the evolution of mating and fertilization biases being affected by several simultaneous processes. The Royal Society 2021-07-14 2021-07-07 /pmc/articles/PMC8261210/ /pubmed/34229496 http://dx.doi.org/10.1098/rspb.2021.1068 Text en © 2021 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Evolution Arnqvist, Göran Grieshop, Karl Hotzy, Cosima Rönn, Johanna Polak, Michal Rowe, Locke Direct and indirect effects of male genital elaboration in female seed beetles |
title | Direct and indirect effects of male genital elaboration in female seed beetles |
title_full | Direct and indirect effects of male genital elaboration in female seed beetles |
title_fullStr | Direct and indirect effects of male genital elaboration in female seed beetles |
title_full_unstemmed | Direct and indirect effects of male genital elaboration in female seed beetles |
title_short | Direct and indirect effects of male genital elaboration in female seed beetles |
title_sort | direct and indirect effects of male genital elaboration in female seed beetles |
topic | Evolution |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8261210/ https://www.ncbi.nlm.nih.gov/pubmed/34229496 http://dx.doi.org/10.1098/rspb.2021.1068 |
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