Evaluating Artificial Insemination Results

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Abstract
Superiority of [artifically inseminated] dairy sires over non-A.L sires is estimated at 2 to 3 times greater than the expected annual improvement for 1 year, using natural-service bulls. The 10 largest A.L organizations dominate the genetic influence on the cow population by owning 46% of the bulls and inseminating 69% of the cows. A considerable portion of the A.L organizations have adopted plans for young sire selection programs. The increased genetic improvement which can result from such programs is dependent on the ability and willingness of studs to increase the selection differential for production. The main obstacles to adopting such programs are cost, size of operation, and ability to purchase desirable young bulls.