Page 7 - Mokairau Sale Catalogue 2021 ebook

• MILK: 200-Day Milk EBV (kg) is an estimate of an animal’s milking
ability. For sires, this EBV is indicative of their daughter’s milking
ability as it affects the 200 day weight of their calves.
• SS: Scrotal Size EBV (cm) is an indicator of the male fertility in
regards to semen quality and quantity. Higher (positive) EBVs indicate
higher fertility. SS is also positively associated with female fertility.
• CARCASE: CWT - Carcase Weight EBV (kg) estimates the genetic
difference in carcase weight at a standard age of 650 days. More
positive EBVs indicate heavier carcases at 650 days of age.
• EMA: Eye Muscle Area EBV (CM2) estimates genetic differences
in eye muscle area at the 12/13th rib site of a 300kg dressed
carcase. More positive EBVs indicate better muscling on animals.
• RIB: Rib Fat EVB (mm) estimates the genetic differences in fat
depth at the 12/13th rib in a 300kg dressed carcase. More positive
EBVs indicate more subcutaneous fat and earlier maturity.
• RUMP: Rump fat EBV (mm) estimates the genetic differences in
fat depth at the P8 site on a 300kg dressed carcase. More positive
EBVs indicate more subcutaneous fat and earlier maturity. Two fat
EBVs are listed as there is variation between animals regarding fat
depth at the two sites.
• RBY: Retail Beef Yield EBV (%) indicates genetic differences
between animals for retail yield percentage in a standard 300 kg
carcase. Sires with larger EBVs are expected to produce progeny
with higher yielding carcases.
• IMF: Intra-muscular Fat Percent EBV (%) is an estimate of the
genetic difference in the percentage of intra-muscular fat at the
12/13th rib site in a 300kg carcase. Depending on target markets,
larger more positive values are generally more favourable.
ACCURACY
Accuracy is presented with every EBV and is an indication of the
amount of information that has been used in the calculation of that
EBV. The higher the accuracy the lower the likelihood of change in
the animal’s EBV as more information is analyzed for that animal
or it’s relatives. Accuracy below 75% should be considered low,
however young bulls with performance data but no progeny will
all have similarly low accuracies.

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