Sensory characterisation of food and beverage stimuli containing β-ionone and differences between individuals by genotype for rs6591536

Research output: Contribution to journalJournal articleResearchpeer-review

S. R. Jaeger, H. C. Reinbach, C. M. Roigard, J. F. McRae, B. Pineau, S. L. Chheang, M. K. Beresford, S. A. Rouse, D. Jin, A. G. Paisley, Y. Jia, R. D. Newcomb

The aroma compound β-ionone is present in many fruits and vegetables and their derived products. Odour profiles at different β-ionone concentrations and perceived contributions of β-ionone to food/beverage flavour have only been partially established, and they generally do not extend to differences among individuals who vary in their sensitivity to the odour. Recent research has identified rs6591536, a single nucleotide polymorphism (SNP) located in the coding region of the odorant receptor OR5A1 as responsible for major differences in ability to detect β-ionone odour. In Study 1, using trained sensory panellists (n = 12), odour profiles were obtained for a range of β-ionone concentrations and compared across sensitivity groups defined by genotypes for rs5691536 (GG/AG or AA). A similar comparative approach was used in Studies 2 and 3, where participants (n = 104 and 158) characterised food/beverage stimuli containing added β-ionone using check-all-that-apply questions. The concentration of β-ionone required to elicit perception of the 'floral', 'rose/violet' and 'aromatic/fragrant' characteristics typically associated with β-ionone depended on the background fruit flavour (apple, raspberry, orange) and/or the product type (juice, jelly). It also differed among people classified as more sensitive ("sensitive") and more insensitive ("insensitive") to the odour of β-ionone. Perception of negative aspects of β-ionone (incl. 'sour, acid, vinegar', 'sharp, pungent', 'soap', 'chemical', 'artificial', 'aftertaste', 'woody') was encountered in all studies, but with varying frequency depending on concentration of added β-ionone and whether participants were "sensitive" or "insensitive" to β-ionone. There was some evidence in Study 3 that perception of β-ionone flavour was masked by the fruity flavours of the test products and that changes in 'sweet' and 'fruity' were associated with β-ionone spike concentration. Overall, this research suggests a need to consider genotype-encoded sensitivity together with other variables when measuring human flavour perception.

Original languageEnglish
JournalFood Research International
Volume62
Pages (from-to)205-214
Number of pages10
ISSN0963-9969
DOIs
Publication statusPublished - 2014
Externally publishedYes

    Research areas

  • Consumer research, Genotype, Odour profiling, Sensory perception

ID: 210532463