Estimation of Genetic and Phenotypic Trends, Heritability and Repeatability for Some Milk Production Traits of Holsteins

Bakir G., KAYGISIZ A.

KAFKAS UNIVERSITESI VETERINER FAKULTESI DERGISI, cilt.15, sa.6, ss.879-884, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 15 Sayı: 6
  • Basım Tarihi: 2009
  • Dergi Adı: KAFKAS UNIVERSITESI VETERINER FAKULTESI DERGISI
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.879-884
  • Van Yüzüncü Yıl Üniversitesi Adresli: Evet

Özet

The purpose of this study is to estimate the trend components and genetic parameters of 305-day milk yield and lactation length in Holstein Friesian Cattle. The phenotypic, genetic and environmental trends for 305 days milk yield and lactation length were found to be -23.59 kg/year and -0.486 days/year, 7.99 kg/year and -0.49 days/year, -31.58 kg/year and -0.976 day/year, respectively. The heritability and repeatability for 305 days milk yield and lactation length were 0.10, 0.11 and 0.27, 0.17, respectively.