Abstract

Uniform guidelines for objective evaluation and recording of swine performance have been outlined by the National Swine Improvement Federation. Number of piglets born alive, 21-day litter weight, backfat, and age to 230 pounds (104 kg) have been selected as traits indicating overall animal fitness and combined into indexes for selecting herd replacements.
 

C. J Christians

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume X. Breeding programs for swine, poultry, and fish., , 199–204, 1986
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