In the present study, breeding information spread over a period of 14 years from 1995 to 2008, was collected from the history-cum-pedigree sheets and milk yield registers of Murrah buffaloes maintained in four centres of Network Project on Murrah Buffalo Improvement (National Dairy Research Institute, Karnal; Central Institute for Research on Buffalo, Hisar and Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana and Choudhary Charan Singh Haryana Agricultural University, Hisar). Data on Average first lactation daily milk yield (MY/FLL) of 832 Murrah buffaloes sired by 95 bulls were used for the study. Farm had significant effect on MY/FLL, while season and year of calving did not affect significantly in the present study. Breeding value for MY/FLL was estimated using best linear unbiased prediction (BLUP) method. The breeding value of different bulls varied from 5.750 kg in first set to 7.065 kg in seventh set.
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