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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crroyalsociety:10.1098/rspb.2008.0066 2024-06-02T08:03:40+00:00 MHC-mediated mate choice increases parasite resistance in salmon Consuegra, Sofia Garcia de Leaniz, Carlos 2008 http://dx.doi.org/10.1098/rspb.2008.0066 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2008.0066 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2008.0066 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Proceedings of the Royal Society B: Biological Sciences volume 275, issue 1641, page 1397-1403 ISSN 0962-8452 1471-2954 journal-article 2008 crroyalsociety https://doi.org/10.1098/rspb.2008.0066 2024-05-07T14:16:50Z 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. Article in Journal/Newspaper Atlantic salmon Salmo salar The Royal Society Proceedings of the Royal Society B: Biological Sciences 275 1641 1397 1403 |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
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 |
Article in Journal/Newspaper |
author |
Consuegra, Sofia Garcia de Leaniz, Carlos |
spellingShingle |
Consuegra, Sofia Garcia de Leaniz, Carlos MHC-mediated mate choice increases parasite resistance in salmon |
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://dx.doi.org/10.1098/rspb.2008.0066 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2008.0066 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2008.0066 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Proceedings of the Royal Society B: Biological Sciences volume 275, issue 1641, page 1397-1403 ISSN 0962-8452 1471-2954 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rspb.2008.0066 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
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275 |
container_issue |
1641 |
container_start_page |
1397 |
op_container_end_page |
1403 |
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1800748266922442752 |