There was an interaction between rearing condition and genotype on alcohol consumption (F(2, 85) = 3.3, P = 0.04). When given simultaneous access to alcohol (8.4% v/v) and sweetened vehicle in a limited access paradigm, PR monkeys who were carriers of the G allele consumed higher levels of alcohol than did non-stress-exposed (MR) subjects genotype (Tukey-Kramer, P < 0.05). Genotype accounted for 12.5% of the variance in PR monkeys. (MR T/T = 29, MR T/G = 25, MR G/G = 8; PR T/T = 10, PR T/G = 11, PR G/G = 8). Values shown are G/KG alcohol consumed in a 1-hour session (G/KG/H) ± SEM. * P < 0.05.