Hostname: page-component-6bf8c574d5-956mj Total loading time: 0 Render date: 2025-02-20T09:16:34.679Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of relationship between mastitis and somatic cell count on genetic selection for mastitis resistance in dairy cattle

Published online by Cambridge University Press:  20 November 2017

H. N. Kadarmideen  and
J.E. Pryce
H. N. Kadarmideen
Affiliation:
Animal Biology Division, Scottish Agricultural College, West Mains Road, Edinburgh EH9 3JG
J.E. Pryce
Affiliation:
Animal Biology Division, Scottish Agricultural College, West Mains Road, Edinburgh EH9 3JG
Get access

Extract

Differences in banding scales for milk quality penalties, as determined by bulk tank somatic cell count (SCC), prevent the use of a single economic value for SCC in an overall economic-genetic selection index (Veerkamp et al., 1998) such as, Profitable Lifetime Index or £PLI. But SCC could be used as a predictor of mastitis as genetic correlation estimates between mastitis and SCC are medium to high (review of Mrode and Swanson, 1996). This suggests that, although deriving a direct single economic value (EV) for SCC based on bulk tank SCC is difficult, a single financial value could still be assigned to SCC based on its relationship with mastitis. Here we use a genetic regression method to calculate the EV of SCC (EVSCC) as a predictor of mastitis. However, the dependency of regression coefficients on mastitis incidence (p) could make such EVSCC variable. The main objective of this study was to evaluate the impact of such relationship on EVSCC and genetic selection in dairy cattle using predicted transmitting abilities of SCC (PTASCC).

Type
Poster Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2000 , 2000 , pp. 113
Copyright
Copyright © The British Society of Animal Science 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Gilmour, A.R., Cullis, B.R., Welham, S.J. and Thompson, R. 1998. ASREML User's Manual, October, 1998. New South Wales Agriculture, Orange Agricultural Institute., Orange, NSW, Australia.Google Scholar
Mrode, R.A. and Swanson, G.J.T. 1996. Genetic and statistical properties of somatic cell count and its suitability as an indirect means of reducing the incidence of mastitis in dairy cattle. Animal Breeding Abstracts 64: 847–857.Google Scholar
Veerkamp, R.F., Stott, A.W., Hill, W.G. and Brotherstone, S. 1998. The economic value of somatic cell count payment schemes for UK dairy cattle breeding programmes. Animal Science 66: 293–298.CrossRefGoogle Scholar