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Sex differences in the genetic architecture of aggressiveness in a sexually dimorphic spider
Sex differences in the genetic architecture of behavioral traits can offer critical insight into the processes of sex‐specific selection and sexual conflict dynamics. Here, we assess genetic variances and cross‐sex genetic correlations of two personality traits, aggression and activity, in a sexuall...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6787860/ https://www.ncbi.nlm.nih.gov/pubmed/31624579 http://dx.doi.org/10.1002/ece3.5595 |
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author | Kralj‐Fišer, Simona Laskowski, Kate L. Garcia‐Gonzalez, Francisco |
author_facet | Kralj‐Fišer, Simona Laskowski, Kate L. Garcia‐Gonzalez, Francisco |
author_sort | Kralj‐Fišer, Simona |
collection | PubMed |
description | Sex differences in the genetic architecture of behavioral traits can offer critical insight into the processes of sex‐specific selection and sexual conflict dynamics. Here, we assess genetic variances and cross‐sex genetic correlations of two personality traits, aggression and activity, in a sexually size‐dimorphic spider, Nuctenea umbratica. Using a quantitative genetic approach, we show that both traits are heritable. Males have higher heritability estimates for aggressiveness compared to females, whereas the coefficient of additive genetic variation and evolvability did not differ between the sexes. Furthermore, we found sex differences in the coefficient of residual variance in aggressiveness with females exhibiting higher estimates. In contrast, the quantitative genetic estimates for activity suggest no significant differentiation between males and females. We interpret these results with caution as the estimates of additive genetic variances may be inflated by nonadditive genetic effects. The mean cross‐sex genetic correlations for aggression and activity were 0.5 and 0.6, respectively. Nonetheless, credible intervals of both estimates were broad, implying high uncertainty for these estimates. Future work using larger sample sizes would be needed to draw firmer conclusions on how sexual selection shapes sex differences in the genetic architecture of behavioral traits. |
format | Online Article Text |
id | pubmed-6787860 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-67878602019-10-17 Sex differences in the genetic architecture of aggressiveness in a sexually dimorphic spider Kralj‐Fišer, Simona Laskowski, Kate L. Garcia‐Gonzalez, Francisco Ecol Evol Original Research Sex differences in the genetic architecture of behavioral traits can offer critical insight into the processes of sex‐specific selection and sexual conflict dynamics. Here, we assess genetic variances and cross‐sex genetic correlations of two personality traits, aggression and activity, in a sexually size‐dimorphic spider, Nuctenea umbratica. Using a quantitative genetic approach, we show that both traits are heritable. Males have higher heritability estimates for aggressiveness compared to females, whereas the coefficient of additive genetic variation and evolvability did not differ between the sexes. Furthermore, we found sex differences in the coefficient of residual variance in aggressiveness with females exhibiting higher estimates. In contrast, the quantitative genetic estimates for activity suggest no significant differentiation between males and females. We interpret these results with caution as the estimates of additive genetic variances may be inflated by nonadditive genetic effects. The mean cross‐sex genetic correlations for aggression and activity were 0.5 and 0.6, respectively. Nonetheless, credible intervals of both estimates were broad, implying high uncertainty for these estimates. Future work using larger sample sizes would be needed to draw firmer conclusions on how sexual selection shapes sex differences in the genetic architecture of behavioral traits. John Wiley and Sons Inc. 2019-08-22 /pmc/articles/PMC6787860/ /pubmed/31624579 http://dx.doi.org/10.1002/ece3.5595 Text en © 2019 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Research Kralj‐Fišer, Simona Laskowski, Kate L. Garcia‐Gonzalez, Francisco Sex differences in the genetic architecture of aggressiveness in a sexually dimorphic spider |
title | Sex differences in the genetic architecture of aggressiveness in a sexually dimorphic spider |
title_full | Sex differences in the genetic architecture of aggressiveness in a sexually dimorphic spider |
title_fullStr | Sex differences in the genetic architecture of aggressiveness in a sexually dimorphic spider |
title_full_unstemmed | Sex differences in the genetic architecture of aggressiveness in a sexually dimorphic spider |
title_short | Sex differences in the genetic architecture of aggressiveness in a sexually dimorphic spider |
title_sort | sex differences in the genetic architecture of aggressiveness in a sexually dimorphic spider |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6787860/ https://www.ncbi.nlm.nih.gov/pubmed/31624579 http://dx.doi.org/10.1002/ece3.5595 |
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