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With these Wagyu sires, you can breed a herd that produces excellent beef.


Below you’ll find a list of all Wagyu sires and bloodlines (some of which you'll find on our farm). Each begins with the animal's name and AWA registration, number starting with FB (for fullblood). Some of them also have a Japanese registration number, which is a number preceded by a “J.”

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With our sires at Prime Valley Farms, you can breed a 100% fullblood herd.


Our sires at Prime Valley Farms have original DNA from Japanese cattle. Because we started with 100% fullblood Wagyu, we’re able to keep providing you with the highest-quality beef.

Below you’ll find a list of our foundation bulls, with name and AWA registration number starting with FB (for fullblood). Some of them also have a Japanese registration number, which is a number preceded by a “J.”


SCD, or Stearoyl CoA Desaturase, is a gene family that distinguishes the healthy fat marbling in Wagyu beef from other beef. SCD testing identifies cattle with the dominant Japanese genotype that produces a certain fat composition.

  • Stearic acid and the amino acid valine (V) make deposited fat harder.
  • Oleic acid and the amino acid alanine (A) make deposited fat softer (and more flavorful).
  • The genotypes for SCD testing are VV, VA, and AA — AA is the most desirable.

Tenderness describes the amount of force it takes someone to cut or chew a piece of meat. Wagyu beef has been documented to be significantly more tender than the beef resulting from any other breed of cattle.

The IGENITY Tenderness test is a genetic profile analysis which evaluates a given animal's DNA and attempts to rank the expected resulting meat tenderness. The IGENITY Tenderness values are assigned from 1 to 10.

It should be noted that no Wagyu cattle have been used to validate the claims of this genetic test, and one should therefore use the test cautiously when comparing Wagyu animals.

Possible Genetic Conditions

Wagyu can be affected by, a carrier for, or free from a recessive trait (or genetic condition).


Spherocytosis (B3) is one of four recessive genetic conditions that the Australian Wagyu Association recognizes. B3 is a disorder of the red blood cells’ surface membrane that causes anemia and severe retardation in Wagyu growth.


Chediak Higashi Syndrome (CHS) is the second recessive genetic condition. CHS is a macrophage (white blood cell) disorder that compromises Wagyus’ immune systems and makes their blood slow to coagulate, giving them an unusually pale color.


Claudin 16 Deficiency (CL16) is the third recessive genetic condition. CL16 is a gene disorder on Chromosome 1 that causes terminal kidney failure. The onset can occur anytime in Wagyu starting in late adolescence, and cattle with CL16 are unlikely to live more than six years.


Factor XI Deficiency (F11) is the fourth recessive genetic condition. F11 is an autosomal disorder associated with prolonged bleeding time and abnormal coagulation. However, this is a non-fatal condition, and affected Wagyu can live and breed normally.


IARS (isoleucyl-tRNA synthetase) is a protein coding gene that has been linked to Weak Calf Syndrome in Wagyu. The disease is responsible for embryonic and perinatal death in affected calves.

Ready to breed healthier, more adaptable cattle for delicious beef?