This year Triple Crown Steak Challenge will be using an updated Wagyu Classification for it's entrants.
Purebred and Fullblood
Purebred the result of a Fullblood Wagyu Bull breeding with an F3 ( which is 87% Wagyu and not commonly occurring in the USA) Sire.
F1 - 50% Crossbred Wagyu
This is the most common type of Wagyu in the US. F1s are the result of a Fullblood Wagyu and a conventional Cow (angus, for example).
Most often, F1s are Wagyu bred with Angus. Angus are a larger breed of cattle, so when crossbred with Wagyu, which are smaller but more intensely marbled, Ranchers get what might be considered “best of both worlds” - a larger animal that produces more beef with better marbling.
F2 - 75% Crossbred Wagyu & F-4 93.75% Purebred Waygu
F2s are the result of a Fullblood Waygu Bull breeding with an F1 Cow.
We would like to thank and give credit to Lone Mountain Wagyu for this information and graphics. You can learn more about Long Mountain Wagyu and see the full article here.