Answers are grounded in this paper and cite their sources.
Annual genetic gain for milk yield was simulated for an artificial insemination population of 115,000 dah'y cows for different values of nine variables in young sire selection and saanpling, and proven stud operation. Maximum genetic advance required the sampling of large numbers of young bulls annually. Increases in selection intensity of dams of bulls yielded uniform increases in rate of genetic change. Decreasing the number of bulls to sire young bulls to two to three each year and replacing one of these annually increased rates of genetic gain. Inbreeding effects were unimportant for these plans.
No takes yet. Share an insight, caveat, or question.
Hunt et al. (1972) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: