Instructions
The Two-Breed Rotation System
Mate cows sired from bulls in genetic group A to bulls from genetic group B.
Mate the heifers from this breeding to bulls from genetic group B for the rest of thier life.
Mate the heifers from this cross breed to bulls from group A for the rest of their lives. This insures that the female is always mated to a bull from a genetic group different from the one that sired her.
Multi-Year Bull Breeding System
Mate a bull from genetic group A with all cows in your possession for 4 to 6 years.
Mate a bull from genetic group B with all cows in your possession for the next 4 to 6 years.
Mate another bull from Genetic group A with your cows. Change the actual bull to avoid breeding sires with their daughters.
Repeat this process for as many years as you like. The more times you use this system, always using bulls of pure genetic groups, the higher the level of heterosis.
How to Crossbreed Cattle
Crossbreeding cattle provides two distinct advantages over mating cattle of the same breed. Crossbred cattle exhibit a characteristic called heterosis or hybrid vigor, meaning they are more productive and produce calves with higher survival rates. Crossbreeding cattle also offsets genetic weaknesses that a single breed may have by combining the two gene pools and reducing the chances of genetic defects. Crossbreeding cattle is relatively easy to do if you have access to at least two pure breeds of cattle. There are several crossbreeding methods used by modern cattle ranchers to crossbreed their cattle.