Page 14 - Brookwood Angus Sale 2021 ebook

TACE – WHAT IS IT?
TACE is simply a performance predicting system. It records an
animal’s own performance, as well as the performance of all
known relatives in the herd. Using this information, it is able
to build a reliable indicator of each animal’s genetic potential.
Each recorded trait is measured as a plus or minus. This shows
the genetic potential in that trait, for that bull, as compared
to the breed average. These measurements are called EBV’s
– Estimated Breeding Values.
Each recorded trait is also presented with an accuracy
percentage. This measures the degree of predictability ie the
likelihood of passing on that recorded trait to his progeny. The
more information we can collect for each animal, the more
reliable the predictability of each trait, and the higher the
percentage. For example, a bull with + 60 kg growth at 400
days and 90% accuracy, can be more confidently expected to
transmit that extra growth to his progeny than a bull with +
60 kg at 400 days and 57 % accuracy.
This doesn’t mean the bull with lower predictability is not going
to pass on that trait, it just means there is less information
on his ability to pass it on . There may be a number of reasons
for this – for example, a young bull may have few closely related
animals.

Heritability Estimates
Calving Ease Dir 14% 86%
Gestation Length 65% 35%
Birth Wt 32% 68%
200-Day Wt 12% 88%
400-Day Wt 23% 77%
600-Day Wt 35% 65%
Mature Cow Wt 40% 60%
Milk 10% 90%
Scrotal Size 39% 61%
Days to Calving 7% 93%
Carcass Wt 41% 59%
Eye Muscle Area 34% 66%
Rib Fat 45% 55%
Rump Fat 32% 68%
Retail Beef Yield % 60% 40%
Intra-muscular Fat % 32% 68%
The amount of The amount of environmental
genetic influence in (non-genetic) influence in a
a trait. trait.

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