Source:http://linkedlifedata.com/resource/umls/id/C0682518
NCI: A group of presumed common ancestry with clear-cut physiological but usually not morphological distinctions. EXAMPLE(S): The specific genotypic or phenotypic variant of an animal. Minnesota5 (swine strain), DXL (poultry strain), RB51 (vaccine strain of Brucella abortus),NCI: A group of presumed common ancestry with clear-cut physiological but usually not morphological distinctions.