Semen characteristics of crossbred (Friesian x Sahiwal) and Sahiwal young bulls maintained under sub-tropical conditions of Punjab [Pakistan]
2003
Ahsan-ul-Haq | Mirza, R.H. | Zahid, I.A. (Research Inst. for Physiology of Animal Reproduction, Kasur (Pakistan))
Comparative studies of semen characteristics were carried out in 50% crossbred (Friesian X Sahiwal) and purebred Sahiwal young bulls maintained under sub-tropical conditions at Research Institute for Physiology of Animal Reproduction, Bhunikey and Semen Production Unit, Qadirabad; respectively. Semen was collected on weekly intervals for a period of one year. The semen characteristics (mean plus minus SE), i.e., volume per ejaculate (ml), mass motility (0-5 score), individual motility of spermatozoa (%), dead and abnormal spermatozoa (%) were 5.62 plus minus 0.14, 1.25 plus minus 0.04, 50.50 plus minus 0.93, 25.78 plus minus 0.91 and 27.15 plus minus 0.97, respectively in crossbred bulls. The corresponding values for these semen characteristics in Sahiwal bulls were 3.64 plus minus 0.09, 1.36 plus minus 0.04, 60.55 plus minus 0.33, 27.73 plus minus 0.87 and 15.41 plus minus 0.86, respectively. These semen parameters differed significantly (P less than 0.05) between crossbred and Sahiwal bulls. It may be concluded from this study that the semen characteristics in crossbred (Friesian X Sahiwal) bulls were poorer than purebred Sahiwal bulls.
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