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.
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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