Calving rates in a Hereford cow herd following synchronised artificial insemination programs
Date
2001
Authors
Deland, M.
Ross, R.
Abraham, E.
Pitchford, W.
Editors
Neville Jopson,
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Conference paper
Citation
Association for the Advancement of Animal Breeding and Genetics. Proceedings, 2001; 14:333-336
Statement of Responsibility
M.P.B. Deland, R.A. Ross, E.A. Abraham and W.S. Pitchford
Conference Name
Conference of the Association for the Advancement of Animal Breeding & Genetics (14th : 2001 : Queenstown, New Zealand)
Abstract
Hereford cows were mated to semen (total 2438 doses) from seven sire breeds (Angus, Belgian Blue, Hereford, Jersey, Limousin, South Devon and Wagyu). A total of 97 sires were represented over four matings from 1993-1996 with an overall calving rate of 62%. Only 19% received a repeat dose of semen. Year of mating and cow age significantly affected calving rates and gestation lengths. Sire breed differences were not significant. However, a wide range of success rates were noted for individual sires.