title: Body odor similarity in noncohabiting twins.
abstract: There is currently considerable interest in biometric approaches using human odor as a marker of disease or genetic individuality. Body odor is also thought to be used during mate choice to select genetically compatible mates. The idea that body odor reveals information about both genetic identity and genetic similarity is most readily tested by examining odor in twin pairs. However, although this idea can be traced back 130 years to Francis Galton in 1875, most studies using dogs fail to control for shared environmental effects associated with cohabitation. Here we show that odors of identical twins (but not dizygotic twins) can be matched by human sniffers at rates better than chance, even when the twins are living apart. In addition, matching frequencies for identical twin odors were not significantly different from those for duplicate odors from the same individual. These results indicate an important genetic influence on body odor and the potential for developing technologies for human odor printing in relation to underlying genotype.
authors.affiliation: School of Biological Sciences, University of Liverpool, Crown Street, Liverpool L69 7ZB, UK. craig.roberts@liverpool.ac.uk
authors.forename: S Craig
authors.initials: SC
authors.lastname: Roberts
authors.forename: L Morris
authors.initials: LM
authors.lastname: Gosling
authors.forename: Tim D
authors.initials: TD
authors.lastname: Spector
authors.forename: Paul
authors.initials: P
authors.lastname: Miller
authors.forename: Dustin J
authors.initials: DJ
authors.lastname: Penn
authors.forename: Marion
authors.initials: M
authors.lastname: Petrie
mesh_terms: D000328:Adult; D001365:Axilla / Q000502:physiology*; D004192:Discrimination, Psychological / Q000502:physiology*; D005060:Europe; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009812:Odorants; D021641:Recognition, Psychology / Q000502:physiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012903:Smell / Q000235:genetics / Q000502:physiology*; D013268:Stimulation, Chemical; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic