The Livestock Breed Ontology (LBO) is a controlled vocabulary for the unambiguous description of breeds. Its utility include proper identification of inherited variation sources in genetics/genomic studies.

• Data archive and details (hosted by BioPortal@NCBO)
• Tree view on AmiGO (hosted at AnimalGenome.ORG)

• Animal QTLdb at Iowa State University

• FAO - International Domestic Livestock Resources Information
• FAO - Domestic Animal Diversity Information
• Oklahoma State University - Breeds of Livestock
• Wikipedia - List of cattle breeds
• Wikipedia - List of pig breeds
• Wikipedia - List of chicken breeds
• Wikipedia - List of sheep breeds
• Wikipedia - List of horse breeds
• South Africa - Catthe International Breeds