Data were PTA for milk, fat, and protein yields from
USDA-DHIAgenetic evaluations that occurred from February
1997 through May 1998 for 11,716 Holstein bulls.
The bulls were born during 1985 or later, were evaluated
in February 1997, and were designated as AI bulls by
the National Association of Animal Breeders (Columbia,
MO). The PTA also were examined for a subset of 536
Holstein bulls that were in active AI service in February
1997