Page 10 - Peters Angus 2021 Catalogue ebook

(from live animal ultrasound scans and from abattoir carcases) and
are adjusted to a standard 400 kg carcase. These EBVs are indicators
of the genetic differences in fat distribution on a standard 400 kg
carcase. Sires with low, or negative, fat EBVs are expected to produce
leaner progeny at any particular carcase weight than will sires with
higher EBVs.
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.
Heifer / Dairy
Self Replacing (SR) $ AngusPure (AP) $ Terminal (HDT) $
+$100 +$104 +$102

2021 TACE EBV AVERAGES FOR 2019
BORN CALVES
CE Dir. CE Dtrs GL Bth Wt 200D 400D 600D MAT Wt Milk
+1.8 +2.1 -4.4 +4.2 +46 +84 +110 +95 +16

SS DTC CWT EMA RIB RUMP RBY IMF
+1.9 -4.2 +61 +5.4 +0.1 -0.2 +0.4 +1.8

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