AVPR1A and Anxiety: This region is homologous to cattle chromosome 5 where anxiety/docility QTL have been detected (Schmutz et al. 2001; Hiendleder et al. 2003) and contains the arginine vasopressin receptor 1A gene, which was linked to a number of social behavior and personality traits in mammals, including aggression, anxiety, and harm avoidance (Meyer-Lindenberg et al. 2009 and references therein).