Computing Algorithms for Sire Evaluation with All Lactation Records and Natural Service Sires

Authors

G. R. Ufford, Cornell University
C. R. Henderson, Cornell University
L. Dale Van Vleck, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

January 1979

Comments

Published in J Dairy Sci 1979, Vol. 62, No. 3. Copyright © 1979 The American Dairy Science Association. Used by permission.

Abstract

Models for sire evaluation by best linear unbiased prediction procedures which consider all lactation records, an environmental correlation among paternal half-sisters in the same herd, herd-yearseason effects, genetic groups, and sires within groups are described. The computing algorithms are outlined briefly. Attention is drawn to a mimeographed publication of 46 pages (12) which describes in detail the computing algorithms for a model including an interaction between sire and herd (the environmental correlation) and a model which does not include the environmental correlation.