Page 7 - Moanaroa Angus Catalogue 2021 ebook

Retail Beef Yield EBV (%) indicates genetic differences between animals for
retail yield percentage in a standard 400 kg carcase. Sires with larger EBVs are
expected to produce progeny with higher yielding carcases.
Intramuscular Fat EBV (%) is an estimate of the genetic difference in the
percentage of intramuscular fat at the 12/13th rib site in a 400 kg carcase.
Depending on market targets, larger more positive values are generally more
favourable.
Docility EBV (%) is an estimate of the genetic differences between animals in
temperament. Docility EBVs are expressed as differences in the percentage of
progeny that will be scored with acceptable temperament (ie. either “docile” or
“restless”).

ACCURACY
Accuracy (%) is based on the amount of performance information available on
the animal and its close relatives - particularly the number of progeny analysed.
Accuracy is also based on the heritability of the trait and the genetic correlations
with other recorded traits. Hence accuracy indicates the “confidence level” of
the EBV. The higher the accuracy value the lower the likelihood of change in the
animal’s EBV as more information is analysed for that animal or its relatives. Even
though an EBV with a low accuracy may change in the future, it is still the best
estimate of an animal’s genetic merit for that trait. As more information becomes
available, an EBV is just as likely to increase in value, as it is to decrease.
Accuracy values range from 0-99%.
As a rule, animals should be compared on EBVs regardless of accuracy. However,
where two animals have similar EBVs the one with higher accuracy could be the
safer choice, assuming other factors are equal.
For further information please contact NZ Angus or TACE.

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