Page 13 - Turiroa Angus Sale 2021 ebook

Carcase Weight EBV (kg) is based on abattoir carcase records and is an Docility EBV (%) is an estimate of the genetic differences between
indicator of the genetic differences in carcase weight at the standard age animals in temperament. Docility EBVs are expressed as differences in the
of 750 days. percentage of progeny that will be scored with acceptable temperament
Eye Muscle Area EBV (sq cm) is calculated from measurements from (ie. either “docile” or “restless”).
live animal ultrasound scans and from abattoir carcase data, adjusted to
a standard 400 kg carcase. This EBV estimates genetic differences in
eye muscle area at the 12/13th rib site of a 400 kg dressed carcase. More SELECTION INDEXES
positive EBVs indicate better muscling on animals. Sires with relatively There are currently three different selection indexes calculated for New
higher EMA EBVs are expected to produce better-muscled and higher Zealand Angus animals.These are Self-Replacing, AngusPure and Heifer/
percentage yielding progeny at the same carcase weight than will sires Dairy Terminal. Each selection index describes a different production/
with lower EMA EBVs. market scenario and relates to a typical commercial herd in New Zealand
Rib Fat and Rump Fat EBVs (mm) are calculated from measurements that is targeting the following specifications.
of subcutaneous fat depth at the 12/13-rib site and the P8 rump site (from Index values are reported as EBVs, in units of relative earning capacity
live animal ultrasound scans and from abattoir carcases) and are adjusted ($’s) for a given market. They reflect both the short-term profit generated
to a standard 400 kg carcase. These EBVs are indicators of the genetic by a sire through the sale of his progeny, and the longer-term profit
differences in fat distribution on a standard 400 kg carcase. Sires with generated by his daughters in a self-replacing cow herd. More information
low, or negative, fat EBVs are expected to produce leaner progeny at any is available on selecting animals using a selection index.
particular carcase weight than will sires with higher EBVs. The Index values are derived using BreedObject technology. More
Retail Beef Yield EBV (%) indicates genetic differences between animals information is available from the BreedObject web site.
for retail yield percentage in a standard 400 kg carcase. Sires with larger
EBVs are expected to produce progeny with higher yielding carcases. Self-Replacing Index ($) - Estimates genetic differences between
animals in net profitability per cow joined for a self-replacing commercial
Intramuscular Fat EBV (%) is an estimate of the genetic difference herd, targeting the production of grass finished steers. Steers are
in the percentage of intramuscular fat at the 12/13th rib site in a 400 kg assumed marketed at 525 kg live weight (280 kg carcase weight and 10
carcase. Depending on market targets, larger more positive values are mm fat depth) at 16 months of age.
generally more favourable.