Determination of Effective Factors for Milk Yield of Brown Swiss Cattle Using by Path Analysis

TAHTALI Y., Sahin A., Ulutas Z., Sirin E., Abaci S. H.

KAFKAS UNIVERSITESI VETERINER FAKULTESI DERGISI, cilt.17, sa.5, ss.859-864, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 17 Sayı: 5
  • Basım Tarihi: 2011
  • Dergi Adı: KAFKAS UNIVERSITESI VETERINER FAKULTESI DERGISI
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.859-864
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

This study was carried out to calculate path coefficients of the effects of lactation length, 305 day milk yield, calving age and calving interval. For this purpose, some milk yields and fertility traits of 810 Brown swiss cows that were raised between 1990-2005 years in Konuklar State Farm are used. Coefficient of correlation is between 305 day milk yields and lactation length were estimated as 0.75 and 0.65, respectively. Percentages of direct effects of factors on actual milk yield were 17.3% for lactation length, 1.00% for 305 day milk yield. Indirect effect of lactation length and 305 day milk yield on actual milk yield were calculated as 299.29 and 1.00 respectively. In that case, direct and indirect effect for calving interval and calving age were low.