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Results – performance variation exists

Calving Ease and Fertility

The progeny of the five sires in each cohort with the heaviest progeny at birth were on average 4.9 kilograms heavier when born than the progeny from the five sires with the lightest progeny at birth, whereas the progeny by the five sires in each cohort with the shortest gestation length were born on average 6.8 days earlier than progeny by the five sires with the longest gestation length.

Likewise, the daughters by the five sires with the shortest days to calving calved on average 37.1 days earlier than the daughters by the five sires with the longest days to calving in each respective cohort.

 

What does this mean to producers?

This indicates there is considerable potential to improve calving ease and female fertility through selection of Angus animals with superior genetics for these traits.

Growth

The progeny of the five sires in each cohort with the heaviest progeny at weaning were on average 18.8 kilograms heavier than the five sires with the lightest progeny at weaning. Similarly, progeny by the five sires with the heaviest 400 and 600 day weights were on average 34.9 kg and 43.8 kg heavier than progeny by the five sires with the lightest 400 and 600 day weights in each respective cohort.

What does this mean to producers?

This variation indicates the considerable potential to improve the growth of animals at certain stages of development through selection of Angus animals with superior genetics for these traits, and ultimately to reduce the age at which sale progeny meet target weights.

Feed Efficiency

The difference in the net feed intake of progeny from the five sires with the lowest net feed intake and the five sires with the highest net feed intake across the first three cohorts of the ASBP was 1.51 kg/day, meaning that progeny of the most feed efficient five sires in each cohort consumed approximately 1.5 kg/day less than the five least efficient sires at the same weight and rate of weight gain.

What does this mean to producers?

This demonstrates the significant potential to increase the feed efficiency through selection of Angus animals with superior genetics for net feed intake.

Carcase Composition

The progeny of the five sires with the heaviest carcase weight progeny at slaughter had a dressed carcase weight that was on average 50.5 kg heavier than the progeny of sires with the lightest carcase weights.

Similarly, the eye muscle area was on average 11.4 cm2 larger, the intramuscular fat 4.8% higher, the rib fat 6.0 mm greater and the rump fat 7.1 mm greater when comparing the average progeny performance of the five highest and lowest performing sires for each of these traits in each respective cohort.

What does this mean to producers?

This demonstrates the significant potential to improve carcase composition through selection of Angus animals with superior genetics for these traits.

Carcase Quality

When assessing MSA grading performance across cohorts 1, 2 and 3, the progeny of the five sires whose progeny achieved the highest MSA index scores ranked 2.5 points better than the average progeny performance of the five sires whose progeny had the lowest MSA index scores. Likewise, the average progeny performance for the five sires with the most marbling was on average 168.3 MSA marble score points higher than the five sires whose progeny had the least marbling, the average ossification 18.4 points lower for the progeny of the five sires with the least ossification, and the shear force 0.9 kg less for the progeny of the five sires with the highest meat tenderness.

What does this mean to producers?

This demonstrates the significant potential to improve carcase and subsequent eating quality through selection of Angus animals with superior genetics for these traits.

ACTIVITY