Consumption of increasing concentrations of ethanol by B6, NZB, BUB inbred strains and reciprocal F1 hybrids after intercross between B6 and NZB and between B6 and BUB mice in a two-bottle preference test. Amount of ethanol consumed (g/kg/day) in B6, NZB and their F1 reciprocal hybrids. b Preference for ethanol in B6, NZB and their F1 reciprocal hybrids. c Total fluid intake (g/kg/day) in B6, NZB and their F1 reciprocal hybrids. n = 15 (B6); n = 9 (NZB); n = 10 (both F1 hybrids). d Amount of ethanol consumed (g/kg/day) in B6, BUB and their F1 reciprocal hybrids. e Preference for ethanol in B6, BUB and their F1 reciprocal hybrids. f Total fluid intake (g/kg/day) in B6, BUB and their F1 reciprocal hybrids. n = 15 (B6); n = 10 (BUB); n = 10 (B6xBUB F1 hybrids); n = 9 (BUBxB6 F1 hybrids)