Page 11 - Puke-Nui Angus Yearling Catalogue

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%. The following guide is given for interpreting accuracy:
See the table on the RIGHT.
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.
ACC RANGE
INTERPRETATION
less than 50%
EBV should be considered as a preliminary estimate. It could change substantially as more performance information becomes available.
50-74%
Medium accuracy, usually based on the animal’s own records and pedigree. Still subject to substantial changes with more information, particularly when the performance of progeny are analysed.
75-90%
Medium - high accuracy and includes some progeny information. Becoming a more reliable indicator of the animal’s value as a parent.
more than 90%
High accuracy estimate of the animal’s true breeding value. It is unlikely that the EBV will change much with the addition of more progeny data.
11