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Conclusion

This project has shown clearly that there was, on average, minimal change in the EBVs of sires in cohorts 1, 2 & 3 of the ASBP, and the initial EBVs of the sires, despite being of low accuracy, described the relative genetic merit of the sires well.

The changes that were observed to the EBVs of individual sires, both in terms of the number of individual sires who EBVs changed, and the magnitude of those changes, were within expected ranges based on the accuracy of the sires’ initial EBVs.

The outcomes from the project demonstrate that EBVs are a reliable selection tool, and beef producers should use EBVs with confidence to identify genetics that are most aligned with their breeding objectives, and in turn, to achieve long term, sustainable genetic improvement.

Most sires will perform as predicted by their EBV, and while some individual sires may perform better or worse than predicted by their EBV, the EBVs will on average, provide a reliable indicator of the genetics that sires are delivering to a breeding herd.