Page 38 - Tapiri Angus 2021 Catalogue ebook

Milk EBV (kg) is an estimate of an animal’s milking ability. For sires, this a standard 400 kg carcase. This EBV estimates genetic differences in eye
EBV indicates the effect of the daughter’s milking ability, inherited from muscle area at the 12/13th rib site of a 400 kg dressed carcase. More
the sire, on the 200-day weights of her calves. For dams, it indicates her positive EBVs indicate better muscling on animals. Sires with relatively
milking ability. higher EMA EBVs are expected to produce better-muscled and higher
Scrotal Size EBV (cm) is calculated from the circumference of the scrotum percentage yielding progeny at the same carcase weight than will sires with
taken between 300 and 700 days of age and adjusted to 400 days of age. lower EMA EBVs.
This EBV is an estimate of an animal’s genetic merit for scrotal size. There Rib Fat and Rump Fat EBVs (mm) are calculated from measurements
is also a small negative correlation with age of puberty in female progeny of subcutaneous fat depth at the 12/13-rib site and the P8 rump site (from
and therefore selection for increased scrotal size will result in reduced age at live animal ultrasound scans and from abattoir carcases) and are adjusted
calving of female progeny. to a standard 400 kg carcase. These EBVs are indicators of the genetic
Days to Calving EBV (days) indicates the fertility of the daughters of the differences in fat distribution on a standard 400 kg carcase. Sires with
sire. It is the time interval between the day when the female is first exposed low, or negative, fat EBVs are expected to produce leaner progeny at any
to a bull in a paddock mating to the day when she subsequently calves. particular carcase weight than will sires with higher EBVs.
A negative EBV for days to calving indicates a shorter interval from bull-in Retail Beef Yield EBV (%) indicates genetic differences between animals
date to calving and therefore higher fertility. for retail yield percentage in a standard 400 kg carcase. Sires with larger
EBVs are expected to produce progeny with higher yielding carcases.
Carcase Weight EBV (kg) is based on abattoir carcase records and is an
indicator of the genetic differences in carcase weight at the standard age Intramuscular Fat EBV (%) is an estimate of the genetic difference
of 750 days. in the percentage of intramuscular fat at the 12/13th rib site in a 400
Eye Muscle Area EBV (sq cm) is calculated from measurements from kg carcase. Depending on market targets,larger more positive values are
live animal ultrasound scans and from abattoir carcase data, adjusted to generally more favourable.

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