title: Genetic variation in nicotinic acid requirements of chicks.
mesh_terms: D000818:Animals; D001835:Body Weight; D002645:Chickens / Q000254:growth & development* / Q000378:metabolism; D003677:Deficiency Diseases / Q000235:genetics / Q000662:veterinary; D004032:Diet; D005260:Female; D014644:Genetic Variation; D009539:Nicotinic Acids / Q000008:administration & dosage; D009751:Nutritional Requirements; D011201:Poultry Diseases / Q000235:genetics; D012641:Selection, Genetic; D014364:Tryptophan / Q000008:administration & dosage
chemical_list: D009539:Nicotinic Acids; D014364:Tryptophan