Individual MHC class I and MHC class IIB diversities are associated with male and female reproductive traits in the three-spined stickleback

Jager, I., Eizaguirre, C., Griffiths, Sian Wyn ORCID: https://orcid.org/0000-0001-6348-7352, Kalbe, M., Krobbach, C. K., Reusch, T. B. H., Schaschl, H. and Milinski, M. 2007. Individual MHC class I and MHC class IIB diversities are associated with male and female reproductive traits in the three-spined stickleback. Journal of Evolutionary Biology 20 (5) , pp. 2005-2015. 10.1111/j.1420-9101.2007.01366.x

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Abstract

Genes of the major histocompatibility complex (MHC) are indispensable for pathogen defence in vertebrates. With wild-caught three-spined sticklebacks (Gasterosteus aculeatus) we conducted the first study to relate individual reproductive parameters to both MHC class I and II diversities. An optimal MHC class IIB diversity was found for male nest quality. However, male breeding colouration was most intense at a maximal MHC class I diversity. One MHC class I allele was associated with male redness. Similarly, one MHC class IIB allele was associated with continuous rather than early female reproduction, possibly extending the reproductive period. Both alleles occurred more frequently with increasing individual allele diversity. We suggest that if an allele is currently not part of the optimum, it had not been propagated by choosy females. The parasite against which this allele provides resistance is therefore unlikely to have been predominant the previous year – a step to negative frequency-dependent selection.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Biosciences
Subjects:	Q Science > Q Science (General)
Uncontrolled Keywords:	Female reproduction; Gasterosteus aculeatus; male breeding colouration; MHC class I; MHC class IIB; negative frequency-dependent selection; nest quality.
Publisher:	Wiley-Blackwell
ISSN:	1010-061X
Last Modified:	27 Oct 2022 08:32
URI:	https://orca.cardiff.ac.uk/id/eprint/62617

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