Grading-up is a breeding system used to improve a producer’s herd by what practice?

• A. Cull low-performing animals each year and breed only the highest-performing animals
• B. Breed only within a single pure breed without selection
• C. Avoid any culling and keep all offspring
• D. Use random mating without selection

Answer: (A)

Grading-up relies on selective breeding by removing the lower-performing animals and breeding only the top performers. By consistently culling the less productive individuals and using the best animals for breeding, you upgrade the herd’s overall genetics and performance generation after generation. This approach, often combined with introducing superior sires from the target breed, gradually increases the proportion of desirable breed traits in the herd. Other options ignore or reverse this selection process, so they don’t drive improvement the same way.