MHC-mediated mate choice increases parasite resistance in salmon
Natural (parasite-driven) and sexual selection are thought to maintain high polymorphism in the genes of the major histocompatibility complex (MHC), but support for a link between mate choice, MHC variation and increased parasite resistance is circumstantial. We compared MHC diversity and Anisakis l...
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ftpubmed:oai:pubmedcentral.nih.gov:2602703 2023-05-15T15:32:25+02:00 MHC-mediated mate choice increases parasite resistance in salmon Consuegra, Sofia Garcia de Leaniz, Carlos 2008-03-25 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2602703 http://www.ncbi.nlm.nih.gov/pubmed/18364312 https://doi.org/10.1098/rspb.2008.0066 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2602703 http://www.ncbi.nlm.nih.gov/pubmed/18364312 http://dx.doi.org/10.1098/rspb.2008.0066 © 2008 The Royal Society Research Article Text 2008 ftpubmed https://doi.org/10.1098/rspb.2008.0066 2013-09-02T08:48:14Z Natural (parasite-driven) and sexual selection are thought to maintain high polymorphism in the genes of the major histocompatibility complex (MHC), but support for a link between mate choice, MHC variation and increased parasite resistance is circumstantial. We compared MHC diversity and Anisakis loads among anadromous Atlantic salmon (Salmo salar L.) returning to four rivers to spawn, which had originated from natural spawning (parents allowed to mate freely) or artificial crosses (parents deprived from the potential benefits of mate choice). We found that the offspring of artificially bred salmon had higher parasite loads and were almost four times more likely to be infected than free-mating salmon, despite having similar levels of MHC diversity. Moreover, the offspring of wild salmon were more MHC dissimilar than the offspring of artificially crossed salmon, and uninfected fish were more dissimilar for MHC than infected fish. Thus, our results suggest a link between disassortative mating and offspring benefits and indicate that MHC-mediated mate choice and natural (parasite-driven) selection act in combination to maintain MHC diversity, and hence fitness. Therefore, artificial breeding programmes that negate the potential genetic benefits of mate choice may result in inherently inferior offspring, regardless of population size, rearing conditions or genetic diversity. Text Atlantic salmon Salmo salar PubMed Central (PMC) Proceedings of the Royal Society B: Biological Sciences 275 1641 1397 1403 |
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Research Article Consuegra, Sofia Garcia de Leaniz, Carlos MHC-mediated mate choice increases parasite resistance in salmon |
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Research Article |
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Natural (parasite-driven) and sexual selection are thought to maintain high polymorphism in the genes of the major histocompatibility complex (MHC), but support for a link between mate choice, MHC variation and increased parasite resistance is circumstantial. We compared MHC diversity and Anisakis loads among anadromous Atlantic salmon (Salmo salar L.) returning to four rivers to spawn, which had originated from natural spawning (parents allowed to mate freely) or artificial crosses (parents deprived from the potential benefits of mate choice). We found that the offspring of artificially bred salmon had higher parasite loads and were almost four times more likely to be infected than free-mating salmon, despite having similar levels of MHC diversity. Moreover, the offspring of wild salmon were more MHC dissimilar than the offspring of artificially crossed salmon, and uninfected fish were more dissimilar for MHC than infected fish. Thus, our results suggest a link between disassortative mating and offspring benefits and indicate that MHC-mediated mate choice and natural (parasite-driven) selection act in combination to maintain MHC diversity, and hence fitness. Therefore, artificial breeding programmes that negate the potential genetic benefits of mate choice may result in inherently inferior offspring, regardless of population size, rearing conditions or genetic diversity. |
format |
Text |
author |
Consuegra, Sofia Garcia de Leaniz, Carlos |
author_facet |
Consuegra, Sofia Garcia de Leaniz, Carlos |
author_sort |
Consuegra, Sofia |
title |
MHC-mediated mate choice increases parasite resistance in salmon |
title_short |
MHC-mediated mate choice increases parasite resistance in salmon |
title_full |
MHC-mediated mate choice increases parasite resistance in salmon |
title_fullStr |
MHC-mediated mate choice increases parasite resistance in salmon |
title_full_unstemmed |
MHC-mediated mate choice increases parasite resistance in salmon |
title_sort |
mhc-mediated mate choice increases parasite resistance in salmon |
publisher |
The Royal Society |
publishDate |
2008 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2602703 http://www.ncbi.nlm.nih.gov/pubmed/18364312 https://doi.org/10.1098/rspb.2008.0066 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2602703 http://www.ncbi.nlm.nih.gov/pubmed/18364312 http://dx.doi.org/10.1098/rspb.2008.0066 |
op_rights |
© 2008 The Royal Society |
op_doi |
https://doi.org/10.1098/rspb.2008.0066 |
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Proceedings of the Royal Society B: Biological Sciences |
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275 |
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1641 |
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1397 |
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1403 |
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1766362920867856384 |