Page 68 - Otapawa Bull Sale 2021 ebook

They reflect both the short-term profit generated by a sire through the sale of his progeny, and
the longer-term profit generated by his daughters in a self-replacing cow herd. A selection
index combines the EBVs with economic information (costs and returns) for specific market
and production systems to rank animals based on relative profit values. Note that different
types of animals can give similar profit values, so consideration should be given to both the
index and the component EBVs when selecting animals for a particular production system.
More information is available on selecting animals using a selection index.
The Index values are derived using BreedObject technology.
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.

HP $ +$110 BH $ +$112 DB $ +$105

OTAPAWA 66