Breeding value estimation for somatic cell score in South African dairy cattle

South African Journal of Animal Science

Volumn 34, Issue 6SUPPL.2, 2004, Pages 32-34

  Mostert, B E ^a   Banga, C ^a   Groeneveld, E ^b   Kanfer, F H J ^c  

^a AGRICULTURAL RESEARCH COUNCIL   (South Africa)

^b INSTITUTE FOR EPIDEMIOLOGY AND PATHOGEN DIAGNOSTICS   (Germany)

^c UNIVERSITY OF PRETORIA   (South Africa)

Author keywords

Fixed regressions; Holstein; Jersey; Testday records; Wilmink curve

Indexed keywords

EID: 43049134440     PISSN: 03751589     EISSN: None     Source Type: Journal    
DOI: 10.4314/sajas.v34i6.3823     Document Type: Article

References (14)

1. Boichard, D. & Rupp, R., 2001. Phenotypic and genetic relationships between somatic cell counts and clinical mastitis in French Holstein cows. Interbull Bulletin 26, 66-72.
2. Emanuelson, U., Danell, B. & Rupp, R., 1988. Genetic parameters for clinical mastitis, somatic cell counts and milk production estimated by multiple-trait restricted maximum likelihood. J. Dairy Sci. 71, 467-476.
3. th World Congr. Gen. Appl. Livest. Prod. 27, 455-456.
4. Groeneveld, E. & Kovac, M., 1990. A generalised computing procedure for setting up and solving mixed linear models. J. Dairy Sci. 73, 513-531.
5. Haile-Mariam, M., Goddard, M.E. & Bowman, P.J., 2000. Estimates of genetic parameters for daily somatic cell count of Australian dairy cattle. J. Dairy Sci. 84, 1255-1264.
6. Kadarmideen, H.N. & Pryce, J.E., 2001. Genetic and economic relationships between somatic cell count and clinical mastitis and their use in selection for mastitis resistance in dairy cattle. Anim. Sci. 73, 19-28.
7. Mostert, B.E., Theron, H.E. & Kanfer, F.H.J., 2001. The effect of calving season and age at calving on production traits of South African dairy cattle. S. Afr. J. Anim. Sci. 31, 205-210.
8. Mrode, R.A. & 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. Anim. Breed. Abstr. 64, 847-857.
9. Nash, D.L., Rogers, G.W., Cooper, J.B., Hargrove, G.L., Keow, J.F. & Hansen, L.B., 2000. Heritability of clinical mastitis incidence and relationships with sire transmitting abilities for somatic cell score, udder type traits, productive life and protein yield. J. Dairy Sci. 83, 2350-2360.
10. Reents, R., Dekkers, J.C.M. & Schaeffer, L.R., 1995a. Genetic evaluation for somatic cell score with a testday model for multiple lactations. J. Dairy Sci. 78, 2858-2870.
11. Reents, R., Jamrozik, J., Schaeffer, L.R. & Dekkers, J.C.M., 1995b. Estimation of genetic parameters for testday records of Somatic Cell Score. J. Dairy Sci., 78, 2847-2857l.
12. Rogers, G.W., Banos, G., Sander Nielsen, U. & Philipsson, J., 1998. Genetic correlations among somatic cell scores, productive life and type traits from the United States and udder health measures from Denmark and Sweden. J. Dairy Sci. 81, 1445-1453.
13. SAS, 1996. SAS user's guide: Statistics, Release 6.12. SAS Institute Inc., Cary, North Carolina, USA.
14. Simianer, H., Solbu, H. & Schaeffer, L.R., 1991. Estimated genetic correlation between disease and yield traits in dairy cattle. J. Dairy Sci. 74, 4358-4365.