Page 50 - Te Taumata Catalogue eBook

600 – 600-Day Growth EBV (kg) is calculated from the weight of progeny taken between 501 and 900 days of age, adjusted to 600
days and for dam age.
This EBV is the best single estimate of an animal’s genetic merit for growth beyond yearling age.
CARCASE EBVS
EMA – Eye Muscle Area EBV (cm ) estimates genetic differences in eye muscle area at the 12/13th rib site of a 300kg dressed
2
carcase. More positive EBVs indicate better muscling on animals. Sires with relatively higher EMA EBVs are expected to produce
better muscled and higher percentage yielding progeny at the same carcase weight than will sires with lower EMA EBVs.
RIB and RUMP - Rib Fat and Rump Fat EBVs (mm) estimate the genetic differences in the fat depth at the 12/13th rib and P8
sites respectively, adjusted to a standard 300kg carcase. More positive EBVs indicate more subcutaneous fat on the carcase.
RBY% – Retail Beef Yield Percent EBV (%) represents total (boned out) meat yield as a percentage of a 300kg dressed carcase.
A more positive EBV indicates higher percentage yield for the 300kg carcase size.
IMF % – Intra-muscular Fat Percent EBV (%) is an estimate of the genetic difference in the percentage of intra-muscular
th
fat at the 12/13 rib site in a 300kg carcase. Depending on target markets, larger more positive values are generally more
favourable.
ACCURACY
ACC (%) - 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 it's relatives.

Page 48