Are high Australian Profit Ranking sires best in all herds? Findings from the Feeding the Genes Project — ASN Events

Are high Australian Profit Ranking sires best in all herds? Findings from the Feeding the Genes Project (#51)

John Morton 1 , Rob Woolaston 2 , Pauline Brightling 3 , Steve Little 4 , Keith Macmillan 5 , Jennie Pryce 6 , Gert Nieuwhof 7
  1. Jemora Pty Ltd, Geelong, Victoria, Australia
  2. , Pullenvale, Queensland, Australia
  3. Harris Park Group, Melbourne, Victoria, Australia
  4. Capacity+ Ag Consulting, Kialla, Victoria, Australia
  5. Department of Veterinary Science and Agricultural Science, The University of Melbourne, Werribee, Victoria, Australia
  6. Biosciences Research Division, Department of Economic Development, Jobs, Transport & Resources, Bundoora, Victoria, Australia
  7. Australian Dairy Herd Improvement Scheme, Melbourne, Victoria, Australia

The effects of increasing Australian Profit Ranking (APR) were assessed in 5 herd feeding systems and at various levels of milk production. In total, 505 herds and 250,857 and 43,941 lactations for Holstein and Jersey cows, respectively, were used for analyses. Effects of sire APR on milk yield variables were positive in all feeding systems and at all herd average solids per cow levels. Effects were similar for the most commonly used feeding systems but were approximately twice as large in herds with a total mixed ration feeding system than in low bail feeding herds. Cows with higher sire APRs were just as likely or more likely to recalve by 20 months as cows with lower genetic merit. Thus selecting high APR sires had benefits in all feeding systems, supporting the use of the same APR across all of these feeding systems. Herd managers using artificial breeding should select high index sires with an appropriate semen price and Australian Breeding Values that are aligned with the breeding objectives for their herd.

Full Paper