A better carcase, through better EBVs

November 2, 2020 3:36 pm

Improving carcase quality is something achievable with EBVs and a recent project examined how well the EBVs of sires entered into the ASBP predicted the performance of their progeny. The work found that the EBVs of sires in cohorts 5,6 and 7 provided an accurate prediction of their carcase genetics, particularly for carcase weight, EMA and IMF, and can be used with confidence when selecting animals for superior carcase genetics.

For intramuscular fat (IMF), the project found the difference between the average Birth Weight EBV of the highest and lowest 10 Birth Weight EBV sires in each cohort was on average 2.6%, across cohorts 5, 6 and 7. This equates to an expected difference in the average IMF of progeny between sire groups of 1.3%. The predicted difference is only half the difference in the EBVs, as the sires only contribute to half of their progeny’s genetics.

When the average IMF of the progeny from the highest and lowest 10 IMF EBV sires was measured, the actual difference in IMF was 1.5%, demonstrating that EBVs were accurately predicting the breeding value of sires for IMF.
Check out the Lessons from the ASBP resources, available on the Angus Australia website for the other carcase traits and the results from the earlier work examining cohorts 1, 2 and 3.