title: Relationships among colonies of the laboratory rat.
mesh_terms: D000818:Animals; D001699:Biometry; D014644:Genetic Variation; D008297:Male; D008334:Mandible / Q000033:anatomy & histology*; D051381:Rats / Q000145:classification / Q000235:genetics*; D011919:Rats, Inbred Strains / Q000145:classification / Q000235:genetics*