|The American Angus Association currently recognizes the following genetic conditions:|
|AM – Arthrogryposis Multiplex||D2 – PRKG2 Gene Mutation for Dwarfism||HG – Horn Gene|
|CA – Contractural Arachnodactyly||DM – Double Muscling||HI – Heterochromia Irides|
|DD – Developmental Duplication||DW – Dwarfism||OS – Osteopetrosis|
|M1 – nt821 mutation for Double Muscling||RD – Red Gene||SN – Syndactyly|
|NH – Neuropathic Hydrocephalus||WT – Wild Type Color Gene|
|The following single letter descriptors appearing after a genetic condition code shall have the following meaning:|
|P – Refers to a “potential” carrier based on an ancestor known to carry that specific mutation.|
|F – Refers to an animal tested for one or more genetic conditions and determined to be “free” of that specific mutation.|
|C – Refers to an animal tested for one or more genetic conditions and determined to be a “carrier” of that specific mutation.|
|A – Refers to an animal tested for one or more genetic conditions and determined to be a carrier of two copies of that specific mutation. It may or may not exhibit the phenotype associated with that genetic condition.|
|The following letter designations describe cases in which there is more than one genetic condition present:|
|XF – Free of more than 1 genetic condition|
|XC – Carrier of more than 1 genetic condition|
|XA – Affected of more than 1 genetic condition|
|RTF – Recessive Trait Free (Produced 35 or more calves from daughters without a genetic defect)|
|NOTE: The genetic condition codes and descriptors reflect the available, reported genetic condition status of the animal. The Association does not warrant or guarantee that any animal is free of all genetic conditions, whether coded or not coded.
AVOIDANCE OF MATING CARRIER ANIMALS WITH THE SAME GENETIC CONDITION IS AN ESSENTIAL COMPONENT OF MANAGING THE INCIDENCE OF GENETIC CONDITIONS, AS IS THE STRATEGIC USE OF DNA TESTING.
For more information, click here to consult the Breeder’s Reference Guide.