Genetic evaluation of bulls and cows with single- and multiple-country test-day models

Journal of Dairy Science

Volumn 85, Issue 6, 2002, Pages 1617-1622

  Jamrozik, J ^a   Schaeffer, L R ^a   Weigel, K A ^b  

^a UNIVERSITY OF GUELPH   (Canada)

^b UNIVERSITY OF WISCONSIN MADISON   (United States)

Author keywords

International genetic evaluation; Multiple trait; Test day model

Indexed keywords

ANIMALIA;

AGE; ANIMAL; ARTICLE; AUSTRALIA; BIOLOGICAL MODEL; BREEDING; CANADA; CATTLE; EVALUATION; FEMALE; GENETICS; INTERNATIONAL COOPERATION; ITALY; LACTATION; MALE; MILK; NEW ZEALAND; REGRESSION ANALYSIS; SEASON; SECRETION; TIME;

AGE FACTORS; ANIMALS; AUSTRALIA; BREEDING; CANADA; CATTLE; FEMALE; INTERNATIONAL COOPERATION; ITALY; LACTATION; MALE; MILK; MODELS, GENETIC; NEW ZEALAND; REGRESSION ANALYSIS; SEASONS; TIME FACTORS;

EID: 0036615619     PISSN: 00220302     EISSN: None     Source Type: Journal    
DOI: 10.3168/jds.S0022-0302(02)74232-X     Document Type: Article

References (9)

1. Jamrozik, J., G. Jansen, L. R. Schaeffer, and Z. Liu. 1998. Analysis of persistency of lactation from a random regression test day model. Proc. 1998 INTERBULL Meeting, Rotoura, New Zealand 17:64-69.
2. Jamrozik, J., and L. R. Schaeffer. 2000. Comparison of two computing algorithms for solving mixed model equations for multiple trait random regression test day model. Livest. Prod. Sci. 67:143-153.
3. Jamrozik, J., L. R. Schaeffer, and K. A. Weigel. 2002. Estimates of genetic parameters for single and multiple-country test-day models. J. Dairy Sci. 85:1617-1622.
4. Schaeffer, L. R. 1994. Multiple-country comparison of dairy sires. J. Dairy Sci. 77:2671-2678.
5. Schaeffer, L. R., J. Jamrozik, G. J. Kistemaker, and B. J. Van Doormaal. 2000. Experience with a test-day model. J. Dairy Sci. 83:1135-1144.
6. Sigurdsson, A., G. Banos, and J. Philipsson. 1996. Estimation of genetic (co)variance components for international evaluation of dairy bulls. Acta Agric. Scand. 46:129-136.
7. Swalve, H. H. 2000. Theoretical basis and computational methods for different test-day genetic evaluation methods. J. Dairy Sci. 83:1115-1124.
8. Weigel, K. A., R. Rekaya, N. R. Zwald, and W. F. Fikse. 2001. International genetic evaluation of dairy sires using a multiple-trait model with individual animal performance records. J. Dairy Sci. 84:2789-2795.
9. Zwald, N. R., K. A. Weigel, W. F. Fikse, and R. Rekaya. 2001. Characterization of dairy production systems in countries that participate in the International Bull Evaluation Service. J. Dairy Sci. 84:2530-2534.