1Division of Animal Genetics, ICAR-IVRI, Izatnagar, Bareilly-243122,U.P, India
Dairy Cattle Breeding Division, ICAR-National Dairy Research Institute, Karnal-132 001, Haryana, India
In the present investigation, bull fertility of Sahiwal breeding bulls has been studied. The study was conducted on records of 43 Sahiwal bulls maintained under 8 sets of Sahiwal breeding project at ICAR-National Dairy Research Institute, Karnal (India). The data on bull fertility of Sahiwal breeding bulls during 27 years (1987–2013) were analysed. The presented study revealed that the average conception rate based on first AI and overall conception rate of Sahiwal breeding bulls were estimated as 45.95% and 46.38%. Average sire conception rate of Sahiwal breeding bulls range from-2% to + 3% and-2% to + 4% for conception rate based on first AI and overall conception rate. It has been observed that the average conception rate based on first AI was lower as compare to overall conception rate and higher conception rate of Sahiwal breeding bulls is having higher sire conception rate.
Bull fertility, Sire conception rate, Sahiwal bulls
