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Is there indirect selection on female extra‐pair reproduction through cross‐sex genetic correlations with male reproductive fitness?

One key hypothesis explaining the evolution and persistence of polyandry, and resulting female extra‐pair reproduction in socially monogamous systems, is that female propensity for extra‐pair reproduction is positively genetically correlated with male reproductive fitness and consequently experience...

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Autores principales: Reid, Jane M., Wolak, Matthew E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6121835/
https://www.ncbi.nlm.nih.gov/pubmed/30283673
http://dx.doi.org/10.1002/evl3.56
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author Reid, Jane M.
Wolak, Matthew E.
author_facet Reid, Jane M.
Wolak, Matthew E.
author_sort Reid, Jane M.
collection PubMed
description One key hypothesis explaining the evolution and persistence of polyandry, and resulting female extra‐pair reproduction in socially monogamous systems, is that female propensity for extra‐pair reproduction is positively genetically correlated with male reproductive fitness and consequently experiences positive cross‐sex indirect selection. However, key genetic correlations have rarely been estimated, especially in free‐living populations experiencing natural (co)variation in reproductive strategies and fitness. We used long‐term life‐history and pedigree data from song sparrows (Melospiza melodia) to estimate the cross‐sex genetic correlation between female propensity for extra‐pair reproduction and adult male lifetime reproductive success, and thereby test a key hypothesis regarding mating system evolution. There was substantial additive genetic variance in both traits, providing substantial potential for indirect selection on female reproductive strategy. However, the cross‐sex genetic correlation was estimated to be close to zero. Such small correlations might arise because male reproductive success achieved through extra‐pair paternity was strongly positively genetically correlated with success achieved through within‐pair paternity, implying that the same successful males commonly sire offspring produced by polyandrous and monogamous females. Cross‐sex indirect selection may consequently have limited capacity to drive evolution of female extra‐pair reproduction, or hence underlying polyandry, in systems where multiple routes to paternity success exist.
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spelling pubmed-61218352018-10-03 Is there indirect selection on female extra‐pair reproduction through cross‐sex genetic correlations with male reproductive fitness? Reid, Jane M. Wolak, Matthew E. Evol Lett Letters One key hypothesis explaining the evolution and persistence of polyandry, and resulting female extra‐pair reproduction in socially monogamous systems, is that female propensity for extra‐pair reproduction is positively genetically correlated with male reproductive fitness and consequently experiences positive cross‐sex indirect selection. However, key genetic correlations have rarely been estimated, especially in free‐living populations experiencing natural (co)variation in reproductive strategies and fitness. We used long‐term life‐history and pedigree data from song sparrows (Melospiza melodia) to estimate the cross‐sex genetic correlation between female propensity for extra‐pair reproduction and adult male lifetime reproductive success, and thereby test a key hypothesis regarding mating system evolution. There was substantial additive genetic variance in both traits, providing substantial potential for indirect selection on female reproductive strategy. However, the cross‐sex genetic correlation was estimated to be close to zero. Such small correlations might arise because male reproductive success achieved through extra‐pair paternity was strongly positively genetically correlated with success achieved through within‐pair paternity, implying that the same successful males commonly sire offspring produced by polyandrous and monogamous females. Cross‐sex indirect selection may consequently have limited capacity to drive evolution of female extra‐pair reproduction, or hence underlying polyandry, in systems where multiple routes to paternity success exist. John Wiley and Sons Inc. 2018-06-15 /pmc/articles/PMC6121835/ /pubmed/30283673 http://dx.doi.org/10.1002/evl3.56 Text en © 2018 The Author(s). Evolution Letters published by Wiley Periodicals, Inc. on behalf of Society for the Study of Evolution (SSE) and European Society for Evolutionary Biology (ESEB). 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 Letters
Reid, Jane M.
Wolak, Matthew E.
Is there indirect selection on female extra‐pair reproduction through cross‐sex genetic correlations with male reproductive fitness?
title Is there indirect selection on female extra‐pair reproduction through cross‐sex genetic correlations with male reproductive fitness?
title_full Is there indirect selection on female extra‐pair reproduction through cross‐sex genetic correlations with male reproductive fitness?
title_fullStr Is there indirect selection on female extra‐pair reproduction through cross‐sex genetic correlations with male reproductive fitness?
title_full_unstemmed Is there indirect selection on female extra‐pair reproduction through cross‐sex genetic correlations with male reproductive fitness?
title_short Is there indirect selection on female extra‐pair reproduction through cross‐sex genetic correlations with male reproductive fitness?
title_sort is there indirect selection on female extra‐pair reproduction through cross‐sex genetic correlations with male reproductive fitness?
topic Letters
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6121835/
https://www.ncbi.nlm.nih.gov/pubmed/30283673
http://dx.doi.org/10.1002/evl3.56
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