Reproductive performance of Holstein-Friesian cows differing genetically in live weight
Laborde, D.Holmes, C. W.Garcia Muniz, J. G.Wichtel, Jeffrey
Proceedings of the New Zealand Society of Animal Production
The reproductive performance of cows of high and low body weight lines was evaluated in 1992-97. In the 2 lines respectively, the interval from calving to ovulation averaged 28 and 31 days (P<0.05). In cows older than 2 years, the CRs to 1st insemination were 58.8 and 70.0% respectively..