Page 9 - Kairuru Herefords Catalogue ebook

Eye Muscle Area EBV (sq cm) is calculated from measurements from live animal mm P8 fat) at 20 months of age, and heifers 475 kg (260 kg carcase weight & 8
ultrasound scans and from abattoir carcase data, adjusted to a standard 300 mm fat depth), at 22 months of age.
kg carcase. This EBV estimates genetic differences in eye muscle area at the Beef Heifer Index ($) - Estimates the genetic differences between animals in net
12/13th rib site of a 300 kg dressed carcase. More positive EBVs indicate better
muscling on animals. Sires with relatively higher EMA EBVs are expected to profitability per yearling heifer joined for a typical self-replacing commercial
produce better-muscled and higher percentage yielding progeny at the same herd where Hereford bulls are joined to either Hereford or other British breed
carcase weight than will sires with lower EMA EBVs. heifers. Selected heifers are retained for breeding and so maternal traits are
Rib Fat and Rump Fat EBVs (mm) are calculated from measurements of of importance. Steers target 510 kg live weight (280 kg HSCW and 7 mm P8 fat
subcutaneous fat depth at the 12/13-rib site and the P8 rump site (from live depth) and heifers 450 kg ( 250 kg HSCW and 8 mm P8 fat depth) at 20 months
animal ultrasound scans and from abattoir carcases) and are adjusted to a of age.
standard 300 kg carcase. These EBVs are indicators of the genetic differences Dairy Beef Index ($) - Estimates the genetic differences between animals in
in fat distribution on a standard 300 kg carcase. Sires with low, or negative, net profitability per mixed age dairy cow joined with all progeny destined for
fat EBVs are expected to produce leaner progeny at any particular carcase slaughter. Steers and heifer progeny target 550 kg live weight (300 kg carcase
weight than will sires with higher EBVs. weight and 6 mm fat depth) at 24 months of age and at 475 kg live weight (260
Retail Beef Yield EBV (%) indicates genetic differences between animals for kg carcase weight and 7 mm fat depth) at 22 months, respectively.
retail yield percentage in a standard 300 kg carcase. Sires with larger EBVs are
expected to produce progeny with higher yielding carcases. All selection indexes are reported as an EBV, in units of net profit per cow
Intramuscular Fat EBV (%) is an estimate of the genetic difference in the mated ($) for a given production/market scenario. They reflect both the
percentage of intramuscular fat at the 12/13th rib site in a 300 kg carcase. short term profit generated by a sire through the sale of his progeny, and the
Depending on market targets, larger more positive values are generally more longer term profit generated by his daughters in a self-replacing cow herd
favourable. (where applicable).
Hereford Prime Index ($) - Estimates the genetic differences between animals in 2021 GROUP BREEDPLAN
net profitability per mixed age cow joined for a typical self-replacing commercial
herd where Hereford bulls are joined to either Hereford or other British breed DIR DTRS GEST BWT 200 400 600 MAT MILK MatV SS
females and targeting the production of grass finished steers for the Hereford +2.1 +1.8 -0.6 +4.1 +33 +55 +78 +67 +17 -- +2.0
Prime program. Selected heifers are retained for breeding and so maternal traits DTC CW EMA RIB RUMP RBY IMF HP $ BH $ DB $
are of importance. Steers target 550 kg live weight (300 kg carcase weight & 7 -2.9 +52 +3.5 +0.7 +0.8 +0.8 +0.5 +$110 +$112 +$105 7