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Updated: Mar 11, 2026

Immunopeptidomics: Isolation of Mouse and Human MHC Class I- and II-Associated Peptides for Mass Spectrometry Analysis
Published on: October 15, 2021
Patterns of MHC-dependent mate selection in humans and nonhuman primates: a meta-analysis
J Winternitz1,2,3, J L Abbate4,5, E Huchard6
1Department of Evolutionary Ecology, Max Planck Institute for Evolutionary Biology, August-Thienemann-Strasse 2, 24306, Ploen, Germany.
Humans and primates show a preference for mating with genetically diverse partners, particularly concerning the major histocompatibility complex (MHC). This study suggests MHC diversity preference is significant in humans and conserved across primate species.
Area of Science:
- Evolutionary biology
- Immunogenetics
- Behavioral ecology
Background:
- Major histocompatibility complex (MHC) genes are crucial for adaptive immunity and mate selection in vertebrates.
- Previous research on MHC-mediated human mate choice has yielded conflicting results due to methodological challenges.
- Understanding MHC-based mate preferences across primates, including humans, is essential for evolutionary insights.
Purpose of the Study:
- To investigate MHC-mediated mate choice preferences in humans and nonhuman primates.
- To determine if there is a conserved pattern of MHC-based mating preferences across primate species.
- To clarify discrepancies in human mate choice studies by controlling for population and methodological factors.
Main Methods:
- Phylogenetically controlled meta-analyses were conducted on 58 effect sizes from 30 studies across seven primate species.
- Data were analyzed to assess trends in MHC-dissimilarity and MHC-diversity preferences.
- Human data were further analyzed to distinguish between observational and experimental study biases.
Main Results:
- A general trend favoring more MHC-diverse mates was observed across primates, significantly so in humans.
- No consistent tendency for MHC-dissimilar mate choice was found; humans showed preferences for both dissimilar and similar mates.
- Preference for MHC similarity in humans appeared to be an artifact of population heterogeneity in observational studies, not experimental ones.
Conclusions:
- Humans exhibit a significant preference for MHC-diverse mates, a pattern likely conserved across primates.
- Assortative mating biases may explain some observed patterns of MHC similarity in human mate choice.
- The overall effect sizes for primate MHC-based mating preferences are weak, necessitating careful study design in future research.
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