The effect of principal interest, the Genotype × Odor interaction (i.e., effect of genotype as a function of odorant type), was significant for the left mPFC (F= 6.771,99, p < 0.05), the left vmPFC (F= 4.361,99, p < 0.05), and the right vmPFC (F= 7.451,99, p < 0.01), all reflecting greater responses to AO (compared to ApCO) in subjects with the AA genotype compared to those with AG genotypes (Figure 3b); a similar trend effect was apparent in the right mPFC (F= 4.061,34, p < 0.06). There was, however, no main effect of Genotype to suggest genotypic group differences that were independent of odor type.
