Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
These were developed by selective breeding for alcohol preference and consumption from the heterogeneous N/N strain. 8 inbred rat strains were intercrossed. After 26 generations of selective breeding, six reciprocal matings were done between HAD1 and LAD1 rats. From each of the 6 parental litters, three brother-sister sets of F1(HAD1?LAD1) rats were chosen and bred to yeild 459 F2 offsprings.