Page 7 - Okawa Herefords Catalogue ebook

RIB - Rib Fat EBV (mm) estimates the genetic differences in fat depth at the 12/13th rib in a 300kg dressed carcase. More positive EBVs indicate more subcutaneous
fat and earlier maturity.

RUMP - Rump Fat EBV (mm) estimates the genetic differences in fat depth at the P8 site on a 300kg dressed carcase. More positive EBVs indicate more subcutaneous
fat and earlier maturity. Two fat EBVs are listed as there is variation between animals regarding fat depth at the two sites.
INTRAMUSCULAR FAT - Intramusclar Fat (IMF) EBVs are estimates of generic difference between animals in intramuscular fat (marbling) at the 12/13 rib site in a 300kg
carcase. Larger, more positive, IMF EBVs are generally more favourable.
ACCURACY: An accuracy is presented with each EBV and gives an indication of the amount of information that has been used in the calculation of that EBV. The
higher the accuracy, the less the animals EBV is likely to change as more information is analysed for that animal or its relatives. Accuracy below 75% should be
considered low.

INDEXES: The Indexes are derived by acknowledging the relative importance (weightings) of EBV’s across the 16 EBV’s produced by A.B.R.I. They are derived in
relation to Market returns, less the cost of production, with all indexes expressed in dollar terms. The three indexes relevant to this sale are:
HEREFORD PRIME INDEX - Estimates the genetic differences between animals in 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 females and targeting the production of grass finished steers for the Hereford Prime
program. Selected heifers are retained for breeding and so maternal traits are of importance. Steers target 550 kg live weight (300 kg carcase weight & 7 mm P8 fat)
at 20 months of age, and heifers 475 kg (260 kg carcase weight & 8 mm fat depth), at 22 months of age.
BEEF HEIFER INDEX - Estimates the genetic differences between animals in net profitability per yearling heifer joined for a typical self-replacing commercial herd where
Hereford bulls are joined to either Hereford or other British breed heifers. Selected heifers are retained for breeding and so maternal traits are of importance. Steers
target 510 kg live weight (280 kg HSCW and 7 mm P8 fat depth) and heifers 450 kg ( 250 kg HSCW and 8 mm P8 fat depth) at 20 months of age.
DAIRY BEEF INDEX - Estimates the genetic differences between animals in net profitability per mixed age dairy cow joined with all progeny destined for slaughter.
Steers and heifer progeny target 550 kg live weight (300 kg carcase weight and 6 mm fat depth) at 24 months of age and at 475 kg live weight (260 kg carcase weight
and 7 mm fat depth) at 22 months, respectively.
AVERAGE EBV’S FOR OKAWA 2019 BORN CALVES
CALVING EASE Hereford Beef Dairy
BW 200 Day 400 Day 600 Day MCW Milk S.S. CWT EMA Rib Rump IMF
DIR DTRS Prime Heifer Beef
+0.6 +1.2 +4.2 +36 +65 +92 +72 +20 +2.2 +63 +4.1 +1.0 +1.0 +0.7 +$133 +$114 +$107
AVERAGE AUSTRALASIAN BREED GROUP RUN 2019 BORN CALVES
CALVING EASE Hereford Beef Dairy
BW 200 Day 400 Day 600 Day MCW Milk S.S. CWT EMA Rib Rump IMF
DIR DTRS Prime Heifer Beef
+2.1 +1.8 +4.1 +33 +55 +78 +67 +17 +2.0 +52 +3.5 +0.7 +0.8 +0.5 +$110 +$112 +$105

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