the top and bottom, respectively, of lists comparing inbred strains for voluntary alcohol consumption/preference (Belknap et al. 1993; Wahlsten et al. 2006; Yoneyama et al. 2008). In all 9 studies, data were available that compared the consumption of 10% ethanol when it was offered versus water. This analysis provided the strongest support for QTLs on mouse chromosomes 2, 3, 4 and 9 (Belknap and Atkins 2001). Since then, additional evidence has been provided supporting the existence of QTLs in some of the same regions, particularly chromosomes 2 (Fehr et al. 2005) and 9 (Hitzemann et al. 2004).
