This may be good or bad. ADG and Feed Efficiency. Some genes affect both. Animals eat more, and are more efficient. ADG and backfat.
Some genes affect both.
Faster gaining hogs are fatter. Allowing certain individuals within a population to produce the next generation. How frequently a desirable gene appears in a population. Want to increase the number of genes for fast growth, lean carcasses, and good reproduction. Livestock breeders have pride in uniform herds.