Understanding EBVs

An animal’s breeding value represents its genetic merit, half of which is passed to its progeny. Although the true breeding value can’t be known, performance traits allow reliable estimates known as Estimated Breeding Values (EBVs).

EBVs are calculated by comparing an animal’s performance with others in the same contemporary group—animals of the same sex and age, managed identically. Links between groups are made through pedigree, allowing comparisons across different herds and environments.

EBVs are expressed in the units of each trait and show how an animal differs genetically from the breed’s base level. What matters most is not the absolute value but the difference between animals, and whether they sit above or below current breed averages. Because EBVs are analysis‑specific, British Simmental BREEDPLAN EBVs cannot be compared with EBVs from other breeds.

EBVs are available for fertility, calving ease, milk, growth and carcase traits. Using them effectively means balancing traits and focusing on those most relevant to your herd, market and environment. A broad set of EBVs helps avoid extremes and supports selection for overall performance.

Calving-related EBVs:

• Calving Ease Direct (CE % Dir): Indicates how easily a sire’s calves will be born. Higher values = easier calving.

• Calving Ease Daughters (CE % Dtrs): Predicts how easily his daughters will calve at two years old.

• Gestation Length (days): Lower values = shorter gestation, easier calving and more post‑birth growth.

• Birth Weight (kg): Lower values = lighter calves and reduced calving difficulty, especially important for heifers.