Galip  Bakir, Ali  Kaygisiz, Suleyman  Cilek, 
    Estimates of Genetic Trends for 305-Days Milk Yield in Holstein Friesian Cattle,
    Journal of Animal and Veterinary Advances,
    Volume 8,Issue 12,
    2009,
    Pages 2553-2556,
    ISSN 1680-5593,
    javaa.2009.2553.2556,
    (https://makhillpublications.co/view-article.php?doi=javaa.2009.2553.2556)
    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<SUP>-1</SUP>, 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.
    Keywords: Cattle;Holstein;milk yield;genetic trends;Turkey