Angus Australia

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35 – Summary

BIRTH

Calving Ease Direct (%) Genetic differences in the ability of a sire’s calves to be born unassisted from 2 year old heifers. Higher EBVs indicate fewer calving difficulties in 2 year old heifers.
 Calving Ease Daughters  (%) Genetic differences in the ability of a sire’s daughters to calve unassisted at 2 years of age. Higher EBVs indicate fewer calving difficulties in 2 year old heifers.
 Gestation Length  days Genetic differences between animals in the length of time from the date of conception to the birth of the calf. Lower EBVs indicate shorter gestation length.
 Birth Weight  kg Genetic differences between animals in calf weight at birth. Lower EBVs indicate lighter birth weight.

 

GROWTH

200 Day Growth  kg Genetic differences between animals in live weight at 200 days of age due to genetics for growth. Higher EBVs indicate heavier live weight.
400 Day Weight  kg Genetic differences between animals in live weight at 400 days of age. Higher EBVs indicate heavier live weight.
600 Day Weight  kg Genetic differences between animals in live weight at 600 days of age. Higher EBVs indicate heavier live weight.
Mature Cow Weight  kg Genetic differences between animals in live weight of cows at 5 years of age. Higher EBVs indicate heavier mature weight.
Milk  kg Genetic differences between animals in live weight at 200 days of age due to the maternal contribution of its dam. Higher EBVs indicate heavier live weight.

 

FERTILITY

Days to Calving days Genetic differences between animals in the time from the start of the joining period (i.e. when the female is introduced to a bull) until subsequent calving. Lower EBVs indicate shorter time to calving.
Scrotal Size  cm Genetic differences between animals in scrotal circumference at 400 days of age. Higher EBVs indicate larger scrotal circumference.

 

CARCASE

Carcase Weight  kg Genetic differences between animals in hot standard carcase weight at 750 days of age. Higher EBVs indicate heavier carcase weight.
Eye Muscle Area  cm2 Genetic differences between animals in eye muscle area at the 12/13th rib site in a 400 kg carcase. Higher EBVs indicate larger eye muscle area.
Rib Fat  mm Genetic differences between animals in fat depth at the 12/13th rib site in a 400 kg carcase. Higher EBVs indicate more fat.
Rump Fat  mm Genetic differences between animals in fat depth at the P8 rump site in a 400 kg carcase. Higher EBVs indicate more fat.
Retail Beef Yield  % Genetic differences between animals in boned out saleable meat from a 400 kg carcase. Higher EBVs indicate higher yield.
Intramuscular Fat % Genetic differences between animals in intramuscular fat (marbling) at the 12/13th rib site in a 400 kg carcase. Higher EBVs indicate more intramuscular fat.

 

FEED EFFICIENCY

Net Feed Intake (Post Weaning) kg/day Genetic differences between animals in feed intake at a standard weight and rate of weight gain when animals are in a growing phase. Lower EBVs indicate more feed efficiency.
Net Feed Intake (Feedlot) kg/day Genetic differences between animals in feed intake at a standard weight and rate of weight gain when animals are in a feedlot finishing phase. Lower EBVs indicate more feed efficiency.

 

TEMPERAMENT

Docility % Genetic differences between animals in temperament. Higher EBVs indicate better temperament.

 

STRUCTURE

Front Feet Angle % Genetic differences between animals in desirable front feet angle (strength of pastern, depth of heel). Higher EBVs indicate more desirable structure.
Front Feet Claw Set % Genetic differences between animals in desirable front feet claw set structure (shape and evenness of claw). Higher EBVs indicate more desirable structure.
Rear Feet Angle % Genetic differences between animals in desirable rear feet angle (strength of pastern, depth of heel). Higher EBVs indicate more desirable structure.
Rear Leg Hind View % Genetic differences between animals in desirable rear leg structure when viewed from behind. Higher EBVs indicate more desirable structure.
Rear Leg Side View % Genetic differences between animals in desirable rear leg structure when viewed from the side. Higher EBVs indicate more desirable structure.

 

SELECTION INDEXES

Angus Breeding Index $ Genetic differences between animals in net profitability per cow joined in a typical commercial self replacing herd using Angus bulls. This selection index is not specific to a particular production system or market end-point, but identifies animals that will improve overall profitability in the majority of commercial grass and grain finishing beef production systems. Higher selection index values indicate greater profitability.
Domestic Index $ Genetic differences between animals in net profitability per cow joined in a commercial self replacing herd targeting the domestic supermarket trade. Higher selection index values indicate greater profitability.
Heavy Grain Index $ Genetic differences between animals in net profitability per cow joined in a commercial self replacing herd targeting pasture grown steers with a 200 day feedlot finishing period for the grain fed high quality, highly marbled markets. Higher selection index values indicate greater profitability.
Heavy Grass Index $ Genetic differences between animals in net profitability per cow joined in a commercial self replacing herd targeting pasture finished steers. Higher selection index values indicate greater profitability.