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.


Principal causes and their correlationated consequences of calving difficulties in Rubia Gallega beef cattle breed are commented.

Present status of selection objectives and the criteria used are presented, as well as some problems related to the current selection index.

Finally, restriction of birth weight as a solution is criticized and some sire evaluation alternatives are cited.