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


Bakir G., KAYGISIZ A., Cilek S.

JOURNAL OF ANIMAL AND VETERINARY ADVANCES, cilt.8, ss.2553-2556, 2009 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 8 Konu: 12
  • Basım Tarihi: 2009
  • Dergi Adı: JOURNAL OF ANIMAL AND VETERINARY ADVANCES
  • Sayfa Sayıları: ss.2553-2556

Özet

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.