breeding sires and mares

The Jockey Club's Online Fact Book includes two new pages to its breeding section with the addition of the Number of Unique Sires by Position in the Pedigree Top Line and Percent of Mares Bred Categorized by Stallion Book Size, the organization said in a release Thursday. The first table reflects the number of unique sires by position within the top line of the pedigree and enables users to drill down by year and generation. Those links provide stallion names and the number of registered Thoroughbreds for that generation's sires...