Animal Science Department


Date of this Version



Published in 3rd World Congress on Genetics Applied to Livestock Production, edited by Gordon E. Dickerson and Rodger K. Johnson, 4 vols. (Lincoln: University of Nebraska Institute of Agriculture and Natural Resources, 1986). Copyright © 1986 Board of Regents University of Nebraska.


In previous world congresses (Cunningham, 1974; Pearson, 1982) methods of estimating weights and choosing traits to include in the selection of objectives were discussed. A more recent discussion of objection functions for breeding decisions is in Allaire and Thraen (1985). This paper will focus more on the specific traits to be included in the selection objective for intensive milk production in temperate zones and on experimental evidence of relative economic importance.