Adena Springs led North American breeders by earnings, both in partnership and individually, for the eighth consecutive year in 2010, according to year&#45;end statistics compiled by The Jockey Club Information Systems.Adena Springs&#45;bred runners earned $13,369,852 and won 506 races from 3,661 starts last year. Horses that Adena Springs bred individually and in partnership earned $13,638,355 and won 519 races from 3,739 starts. Adena Springs is owned by Frank Stronach.Brereton C. Jones, owner of Airdrie Stud in Kentucky, ended the 2010 racing season in second behind Adena Springs on both the individual and partnership lists. Horses Jones bred alone earned a total of $6,545,265 and won 236 races out of 1,565 starts. When the group expands to include horses Jones also bred in partnership, the earnings total rises to $7,504,518 for the winners of 293 races from 1,858 starts.The remaining top 10 individual breeders last year were Eugene Melnyk with $6,004,832 and 232 wins from 1,458 starts; Gulf Coast Farms with $5,593,561 and 114 wins from 640 starts; WinStar Farm with $5,390,660 and 127 wins from 705 starts; Claiborne Farm and Adele Dilschneider with $4,606,322 and 35 wins from 187 starts; the late Edward P. Evans with $4,404,871 and 94 wins from 539 starts; Juddmonte Farms with $3,506,104 and 49 wins out of 285 starts; Darley with $3,228,864 and 53 wins from 377 starts; and Kenneth and Sarah Ramsey with $3,083,814 and 160 wins from 1,175 starts.The other top 10 breeders, including partnerships, were WinStar Farm with $6,608,607 and 152 wins from 868 starts; Claiborne Farm with $6,028,436 and 102 wins from 590 starts; Eugene Melnyk, who bred no horses in partnership, with $6,004,832 and 232 wins from 1,458 starts; Gulf Coast Farms with $5,648,661 and 116 wins from 650 starts; Will Farish with $5,581,235 and 167 wins from 988 starts; Dilschneider with $5,242,868 and 48 wins from 265 starts; Evans, who bred no horses in partnership, with $4,404,871 and 94 wins from 539 starts; and Darley with $4,366,735 and 114 wins from 736 starts.