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
Download Full PDF BibTEX Citation Endnote Citation Search the Proceedings

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.