alexa Mating patterns in seminatural populations of mice influenced by MHC genotype.
Immunology

Immunology

Immunogenetics: Open Access

Author(s): Potts WK, Manning CJ, Wakeland EK, Potts WK, Manning CJ, Wakeland EK

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Abstract Because of the central role of major histocompatibility complex (MHC) genes in immune recognition, it is often assumed that parasite-driven selection maintains the unprecendented genetic diversity of these genes. But associations between MHC genotype and specific infectious diseases have been difficult to identify with a few exceptions such as Marek's disease and malaria. Alternatively, MHC-related reproductive mechanisms such as selective abortion and mating preferences could be responsible for the diversity. To determine both the nature and strength of selection operating on MHC genes by we have studied components of selection in seminatural populations of mice (Mus musculus domesticus). Here we assess MHC-related patterns of reproduction and early (preweaning) mortality by analysing 1,139 progeny born in nine populations, and 662 progeny from laboratory matings. Reproductive mechanisms, primarily mating preferences, result in 27\% fewer MHC-homozygous offspring than expected from random mating. MHC genotype had no detectable influence on neonatal (preweaning) mortality. These mating preferences are strong enough to account for most of the MHC genetic diversity found in natural populations of Mus. This article was published in Nature and referenced in Immunogenetics: Open Access

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