One of the most important factors contributing to the rate of genetic progress in a breed is the selection of sires by producers for breeding cows and heifers in their herd. The resulting pregnancies and heifer calves born become the main source of replacement heifers, which leads to the genetic gain achieved in each herd and therefore within the breed population. Given the bank of data at CDN related to all elements of genetic improvement, a recent analysis was established for providing annual statistics regarding the market share held by the various A.I. organizations marketing their sires in Canada as well as the list of the most popular sires of heifers born in Canada and registered in the breed association herdbook.
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