AI Article Synopsis
- The major histocompatibility complex (MHC) consists of diverse genes essential for the immune system and may influence individual odors, which animals use to evaluate potential mates and social partners.
- Researchers studied the link between chemical odors and MHC genotypes in mandrills, finding that while odors were not directly tied to specific MHC supertypes, there was a strong connection between odor similarity and MHC similarity.
- The study indicates that individual odors might signal genetic quality and help animals assess genetic similarity, illuminating potential mechanisms for mate selection and kin recognition.
Article Abstract
The major histocompatibility complex (MHC) is an extraordinarily diverse cluster of genes that play a key role in the immune system. MHC gene products are also found in various body secretions, leading to the suggestion that MHC genotypes are linked to unique individual odourtypes that animals use to assess the suitability of other individuals as potential mates or social partners. We investigated the relationship between chemical odour profiles and genotype in a large, naturally reproducing population of mandrills, using gas chromatography-mass spectrometry and MHC genotyping. Odour profiles were not linked to the possession of particular MHC supertypes. Sex influenced some measures of odour diversity and dominance rank influenced some measures of odour diversity in males, but not in females. Odour similarity was strongly related to similarity at the MHC, and, in some cases, to pedigree relatedness. Our results suggest that odour provides both a cue of individual genetic quality and information against which the receiver can compare its own genotype to assess genetic similarity. These findings provide a potential mechanism underlying mate choice for genetic diversity and MHC similarity as well as kin selection.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3013381 | PMC |
| http://dx.doi.org/10.1098/rspb.2010.0571 | DOI Listing |
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