Breed structures in Australian dairy herds.
Australia
breeding
dairy
fertility
heterosis
Journal
Australian veterinary journal
ISSN: 1751-0813
Titre abrégé: Aust Vet J
Pays: England
ID NLM: 0370616
Informations de publication
Date de publication:
Jan 2022
Jan 2022
Historique:
revised:
16
09
2021
received:
25
06
2021
accepted:
19
09
2021
pubmed:
16
10
2021
medline:
15
2
2022
entrez:
15
10
2021
Statut:
ppublish
Résumé
Breed structures of Australian dairy herds over time were described for a large subset of milk-recording herds. The focus for this study was to describe the use of crossbreeding by dairy farmers, specifically proportions of herds using crossbreeding, whether they were using two-breed or three-breed crossbreeding systems, and how herd-breed structures changed over time. The most common breed structure in Australian milk-recording herds between 2000 and 2013 was two-breed crossbreeding (39% of herd-years). The next most common breed structure was purebred (35%). Over the period studied, the proportion of herds that were purebred decreased, while the proportion of herds that were crossbreeding increased (particularly three-breed crossbreeding herds). Herd-breed structures and changes over time varied with region and with the herd's calving system. There were also considerable changes in breed structure within herds, including herds changing breed structure before reverting back to their original breed structure. These results indicate that breed structures in milk-recording dairy herds in Australia are dynamic, and that farmers have commonly employed crossbreeding strategies.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
29-39Subventions
Organisme : Dairy Australia
Informations de copyright
© 2021 Australian Veterinary Association.
Références
Butler WR. Nutritional interactions with reproductive performance in dairy cattle. Anim Reprod Sci 2000;60/61:449-457.
Morton J. InCalf fertility data project 2011. Melbourne, Dairy Australia, 2011. Available at: https://nla.gov.au/nla.cat-vn5759704.
Harris BL, Winkelman AM. Influence of North American Holstein genetics on dairy cattle performance in New Zealand. In: Proceedings of the Large Herds Australia Conference, Echua-Moama, 2000; 122-136.
Mee JF, Fahey J, Crilly J. Breeding the dairy cow of the future-Today's challenges. In: Proceedings of the National Dairy Conference, Woodlands House Hotel, Adare, Co. Limerick, Ireland, 1999; 7-16.
Pryce JE, Royal MD, Garnsworthy PC et al. Fertility in the high producing dairy cow. Livest Prod Sci 2004;86:125-135.
Harris BL, Kolver ES. A review of holsteinization on intensive pastoral dairy farming in New Zealand. J Dairy Sci 2001;84(E. Suppl):E56-E61.
Grainger C, Goddard ME. A review of the effects of dairy breed on feed conversion efficiency-an opportunity lost? In: Proceedings of the 25th Biennial Conference of the Australian Society of Animal Production, 2004;25:77-80.
Pryce JE, Nielsen BL, Veerkamp RF et al. Genotype and feeding system effects and interactions for health and fertility traits in dairy cattle. Livestock Prod Sci 1999;57:193-201.
Pyman MFS. Performance of Jersey cross Holstein-Friesian crossbred cows in predominantly Holstein-Friesian herds in Victoria [PhD thesis], University of Melbourne, Melbourne, 2007.
The Council on Dairy Cattle Breeding. Trend in Inbreeding Coefficients of Cows for Holstein or Red & White, 2021. Available at: https://queries.uscdcb.com/eval/summary/inbrd.cfm. Accessed 6 August 2021.
Scott BA, Haile-Mariam M, Cocks BG et al. How genomic selection has increased rates of genetic gain and inbreeding in the Australian national herd, genomic information nucleus, and bulls. J Dairy Sci 2021;104(11).
Woolaston R, Shepherd R. Improvement of the reproductive performance of Victorian dairy herds. Review and recommendations carried out for the Gardiner Foundation. Gardiner Foundation, 2011.
ADHIS. Dairy improvement report. ADHIS Pty Ltd, Melbourne, 2008.
ADHIS. Annual report, 2012-2013. ADHIS Pty Ltd, Melbourne, 2013.
Dairy Australia. Cows and farms. 2018. Available at: https://www.dairyaustralia.com.au/industry/farm-facts/cows-and-farms. Accessed 4 June 2019.