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Paper

Written Paper

Reproductive performance of Holstein friesian and jersey cattle in Punjab, Pakistan  [2008]

Lateef, M. (University of Agriculture, Faisalabad (Pakistan). Faculty of Animal Husbandry) Gondal, K.Z. (University of Agriculture, Faisalabad (Pakistan). Faculty of Animal Husbandry) Younas, M.(University of Agriculture, Faisalabad (Pakistan). Faculty of Animal Husbandry) Mustafa, M.I. (University of Agriculture, Faisalabad (Pakistan). Directorate of Advanced Studies) et al.

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The data on 575 records of 270 Holstein Friesian and 818 records of 326 Jersey cows maintained in Punjab, Pakistan were analyzed. The cows were grouped into imported Holstein Friesian, imported Jersey, Farm born Holstein Friesian and farm born Jersey cows. Breed group significantly influenced age at first calving, service period and breeding efficiency. While non-significant effect of season of birth was observed on these traits except service period. Effect of lactation number was non-significant service period. The longest age at first calving was observed in cows born during summer season in farm born Holstein Friesian and Jersey cows. Service period of imported Holstein Friesian and Jersey cows was higher than those of farm born Holstein Friesian and Jersey cows. Shortest service period was observed in summer calvers in imported Holstein Friesian and farm born Jersey cows while among imported Jersey and farm born Holstein Friesian cows shortest service period was observed in autumn calvers. Breeding efficiency in Jersey cows was significantly higher than Holstein Friesian cows. Maximum breeding efficiency was observed in farm born (during summer and winter season) Holstein Friesian and Jersey cows.

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Pakistan Journal of Agricultural Sciences (Pakistan)

ISSN : 0552-9034

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