Page 53 - Kaharau Angus Catalogue 2021 ebook

Kaharau cattle are Performance Recorded on TACE

EBVS EXPLAINED
Calving Ease EBVs (%) are based on calving difficulty scores, calves. For dams, it indicates her milking ability.
( CE ) birth weights and gestation length information. More Fertility
positive EBVs are favourable and indicate easier calving. SS - Scrotal Size (cm) is calculated from the circumference
CE DIR - indicates the influence of the sire on calving ease in of the scrotum taken between 300 and 700 days of age and
purebred females calving at two years of age. adjusted to 400 days of age. Higher positive EBVs indicate
CE DTRS -The EBV for daughters' calving ease indicates how higher fertility.
easily that sire's daughters will calve at two years of age. Carcase
GL - Gestation Length (days ) is based on AI records. Lower Carcase Weight (kg) estimates the genetic differences in
(negative) GL EBVs indicate easier calving and increased carcase weight at the standard age of 650 days.
growth after birth. Eye Muscle Area (sq cm) estimates genetic differences in
Birth eye muscle area at the 12/13th rib site of a 300 kg dressed
BW EBV (kg) is based on the measured birth weight of carcase. More positive EBVs indicate better muscling on
progeny, adjusted for dam age. The lower the value the lighter animals.
the calf at birth and the lower the likelihood of a difficult birth. Rib Fat and Rump Fat (mm) estimates the genetic differences
This is particularly important when selecting sires for use over in fat depth at the 12/13-rib site in a 300 kg carcase. Positive
heifers. EBVs indicate more subcutaneous fat & earlier maturity.
Growth Retail Beef Yield (%) indicates genetic differences between
200 D Growth EBV (kg) is calculated from the weight of animals for retail yield percentage in a standard 300 kg
progeny taken between 80 and 300 days of age. Values are carcase. Positive EBVs indicate higher percentage yield.
adjusted to 200 days and for age of dam. This EBV is the best Intramuscular Fat (%) is an estimate of the genetic difference
single estimate of an animal's genetic merit for growth to early in the percentage of intramuscular fat at the 12/13th rib site in
ages. a 300 kg carcase. Depending on market targets, larger more
400 D Weight EBV (kg) is calculated from the weight of positive values are generally more favourable.
progeny taken between 301 and 500 days of age, adjusted Selection Indices
to 400 days and for age of dam. This EBV is the best single Self-Replacing Index ($) - Estimates the genetic differences
estimate of an animal's genetic merit for yearling weight. between animals in net profitability per cow joined for an
600-D Weight EBV (kg) is calculated from the weight of example commercial herd (self replacing herd run in a
progeny taken between 501 and 900 days of age, adjusted temperate environment) in which some females are retained
to 600 days and for age of dam. This EBV is the best single for breeding and surplus females, along with all males, are
estimate of an animal's genetic merit for growth beyond slaughtered. Steers are assumed marketed at 525 kg live
yearling age. weight (280 kg carcase weight) by 16 months of age.
MCW - Mature Cow Weight (kg) is an estimate of the genetic Angus Pure Index ($) - Estimates the genetic differences
difference in cow weight at 5 years of age. between animals in net profitability per cow joined for an
Milk EBV (kg) is an estimate of an animal's milking ability. For example commercial herd (self replacing herd run in a
sires, this EBV indicates the effect of the daughter's milking temperate environment) in which some females are retained
ability, inherited from the sire, on the 200-day weights of her for breeding and surplus females, along with all males, are
slaughtered. Steers are assumed marketed at 565 kg live
weight (300 kg carcase weight) by 16 months of age with a
significant premium paid for marbling.

- 51 -