Association between the dopamine D2 receptor (DRD2) polymorphism and the personality traits of healthy Japanese participants

► Examination of the relationship between DRD2/ANKK1 polymorphisms and personality. ► Investigating the -141C Ins/Del and Taq1A polymorphisms. ► Temperament and Character Inventory (TCI) based personality traits testing. ► Little impact on personality traits solely by the DRD2/ANKK1 polymorphisms. ► Possible effect of interaction between the DRD2/ANKK1 genes on personality trait.