Theses and Dissertations


Nicole Reeder

Issuing Body

Mississippi State University


Mosby, Terezie T

Committee Member

Zhou, Qian

Committee Member

Cheng, Wen-Hsing

Date of Degree


Document Type

Graduate Thesis - Open Access

Degree Name

Master of Science


Single nucleotide polymorphisms (SNPs) in various taste receptor genes have previously been linked to outcomes such as differences in taste thresholds, food liking, and body mass index, but no studies of this sort have examined sour taste. This study genotyped 501 young adults for PKD2L1 rs603424 and administered a Food Frequency Questionnaire and Tanita body composition testing to look for associations between the noted SNP, dietary intake, and body composition. Intake of citrus fruit, vitamin C, caffeine, and alcohol were significantly associated with genotype in two-way ANOVA analyses looking at the effect of genotype and race or sex on dietary intake. Regarding body composition, genotype was significantly associated with BMI, but not body fat percentage or fat free mass. These findings suggest that rs603424 may influence intake of certain sour and bitter dietary components; however, further research will be needed to confirm these findings.