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Journal of Animal and Veterinary Advances
Year: 2009  |  Volume: 8  |  Issue: 12  |  Page No.: 2553 - 2556

Estimates of Genetic Trends for 305-Days Milk Yield in Holstein Friesian Cattle

Galip Bakir, Ali Kaygisiz and Suleyman Cilek    

Abstract: The purpose of this study was to estimate the trends components of 305-days milk yield in Holstein Friesian Cattle Holstein cows raised at the Ceylanpinar state farm in Turkey between 1986 and 2007 years. The phenotypic, genetic and environmental trends for 305-days milk yield were found to be 106.91, 13.42 and 93.49 kg year-1, respectively. Despite, there was a correct decision in selection environmental factors affected yield more. In this respect, continuing the improving environmental factors which is composed of maintenance, feeding, milking practices and barn is recommended.

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