Abstract

Principal causes and their corre1 ationated consequences of 
calving difficulties in Rubia Gallega beef cattle breed are 
commented.
Present status of selection objetives 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.
 

J. Canon, M. Vallejo, S. Dunner

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume IX. Breeding programs for dairy and beef cattle, water buffalo, sheep, and goats., , 451–456, 1986
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