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To evaluate the productive performance of Holstein Friesian cattle maintained at Government Dairy Farm Quetta. For this study the data were collected and utilized for the period of 2006 to 2013. In this study the parameters including effect of sire, parity, effect of season and calving year were under the study. While the heritability and repeatability was analyzed with the method of data analysis. In current study result for milk yield showed that higher milk yield and lactation length were observed in spring season as compared to other seasons. The results of heritability and repeatability for milk yield, lactation length and dry period were low, medium to high. In this study effect of calving season was observed significantly on above traits with low and moderate results of heritability estimate, it is concluded that milk yield, lactation length and dry period are highly influenced by environmental factors.
Keywords: Performance traits; Holstein Frisian; Subtropical environment