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Breedplan - A General Introduction

Breedplan - Only 2017 Hereford Group regarding the genetic differences in carcase
Breedplan EBVs with Accuracy can be validly composition between animals in a standard 300 kg
compared between Hereford herds. Accuracies are carcase.
important and improve as more performance CW: Carcase Weight EBVs (kg) estimates the
information becomes available. genetic differences between animals in hot standard
Traits Observed indicates those traits that have been carcase weight (as defined by AusMEAT) at 650 days
recorded and contributing to determining the EBVs of age.
for an animal. These appear directly below the EBVs EMA: Eye Muscle Area EBVs (cm2) estimates
of an animal. genetic differences between animals in eye muscle
Calving area at 12/13th rib site in a 300kg steer carcase.
Calving ease DIR estimates the genetic differences Larger, more positive, EMA EBVs indicate better
between animals in the ability of calves from 2 year muscling.
old heifers to be delivered without assistance. Rib and Rump: These Fat EBVs (mm) estimate
Calving ease DTRS estimates the genetic genetic differences between animals in fat depth at
differences between animals in the ability of 2 year the 12/13th rib site and the P8 rump site in a 300kg
old daughters to calve without assistance. steer carcase. More positive EBVs indicate more
Gestation length estimates the genetic differences subcutaneous fat and earlier maturity.
between animals in the number of days from the Retail: Retail Beef Yield EBVs (%) estimates
conception to birth. genetic differences between animals in boned out
Birth retail beef yield in a 300kg steer carcase. A more
EBVs based on calf weights (kgs) at birth adjusted positive, RBY EBV indicates higher percentage yield.
for dam age. Smaller EBVs are more favourable. IMF: Intramuscular Fat EBVs (%) estimates genetic
Growth differences between animals in intramuscular fat
Milk EBVs (kg) estimate an animal's milking ability. (marbling) at the 12/13 rib site in a 300kg carcase.
For sires, this estimates the maternal effect his Depending on the target markets, larger, more
daughters will have on the 200-day weight of positive, IMF EBVs are generally more favourable.
progeny. This EBV is calculated by partitioning the DOC: expressed as differences in the % of progeny
difference in the 200-day weight of calves into that will be scored with an acceptable temperament
growth and milk components. Larger (+) 200 Day – higher is better.
Milk EBVs are generally more favourable. Australian Hereford Selection Indexes
200, 400 & 600: Growth EBVs (kg) calculated from Each selection index describes a different
weights of calves taken at various times. The values production/market scenario and relates to a typical,
are adjusted to 200, 400 or 600. The best estimate self-replacing Hereford herd in temperate Australia
of an animal’s genetic merit for growth at that age. targeting the following specifications:
Fertility Supermarket Index
SS: Scrotal Size EBVs (cm) indicates male fertility Grass Fed Steer Index
for semen and quantity. Higher (+) EBVs indicate Grain Fed Steer Index and
higher fertility.SS is also positively linked with female EU Index.
fertility. Because it relies upon a number of assumptions that
Carcase will not reflect all herds, it should be used very
BREEDPLAN combines both live animal ultrasound carefully.
scanning information with abattoir chiller carcase Please ask for additional information or visit
data to calculate EBVs that provide information www.herefordsaustralia.com.au.

July Breedplan data used in catalogue.

The following are examples of which EBVs may be useful in selecting bulls:
Terminal sire – Birth, Growth and Carcase
Retain females – as above plus Milk and Fertility
Bullocks – EU Index

Breed Average EBVs for 2017 born calves
Gest. Birth 200 400 600 Scrotal Days Carcase Eye Rib Rump Retail Supermark Grass Fed Grain Fed EU
Beef
CED CEDt (days) (kg) Day Day Day Milk Size to Wt. Muscle (mm) (mm) Yield IMF Doc Index ($) Index ($) Steer Index Index
Fat
Fat
Steer
et
%
Wt. Wt. Wt. (kg)
Len. Wt.
($)

($)
Area
rs
(cm) Calv. (kg)
(%)
(kg) (kg) (kg)
(sq.cm)
EBV +1.1 +1.2 -0.3 +4.4 +33 +54 +77 +16 +2.0 -2.6 +50 +3.2 +0.5 +0.5 +0.8 +0.4 +2 +$87 +$83 +$95 +$97

All sale animals have EBVs in the top 5, 10 & 20% highlighted

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