The fraction of the differences among animals for a particular trait that is transmitted to offspring. Days to 230 lb. 21-d litter weight 1. Intensity of selection a. The smaller the fraction saved, the greater the intensity, and more genetic progress.
Greater intensity results in faster genetic progress, selection differential is greater.
The average age of parents when the offspring born. Selection intensity - the fraction of individuals that are selected for the next generation. The smaller the fraction saved, the larger the intensity and more genetic progress can be made. Intensity is greater for males than for females. Number of traits being selected for.