Genetic Optimization of Sow Productivity
North Carolina State University Swine Genetics Research from 2004-2005. Optimal sow productivity occurs with maximum number of pigs per litter, litters per year and lactation yield while also optimizing pig birth weight, sow longevity and lifetime productivity. Most genetic evaluation systems focus on only some of these traits for selection. For example, the Swine Testing and Genetic Evaluation System (STAGES) has traditionally addressed genetic evaluation of number of pigs born alive, 21-day litter weights and number of pigs weaned. However, litter birth weight and the interval from weaning to mating are additional traits that deserve consideration to fully optimize sow productivity.