Relationships between beta-lactoglobulin and beta-casein Polymorphisms and production traits in brown swiss and holstein


ÖZDEMİR M. , DOĞRU Ü.

JOURNAL OF APPLIED ANIMAL RESEARCH, cilt.31, ss.165-168, 2007 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 31 Konu: 2
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1080/09712119.2007.9706654
  • Dergi Adı: JOURNAL OF APPLIED ANIMAL RESEARCH
  • Sayfa Sayıları: ss.165-168

Özet

To study the effects of Beta-Lactoglobulin (beta-Lg) and Beta-Casein (beta-Cn) polymorphism on milk production traits, milk samples from Brown Swiss, Holstein and East Anatolian Red cows were analyzed for beta-Lg and beta-Cn AA, AB and BB types using horizontal starch-gel electrophoresis method. Differences of both beta-Lg and beta-Cn among breeds studied in terms of proportion of phenotype were significant on gene variants. While effects of beta-Cn phenotypes on studied yield traits were not significant, there was a main effect of beta-Lg genotype on fat concentration, actual milk yield, actual fat yield, 305 d fat yield and lactation period in Brown Swiss and Holstein cows, but not on 305-days milk yield. We suggest that production and percentage of fat ratio may be maximized by the use of beta-Lg AA genotype and milk production by the use of beta-Lg AB genotype with selective goal in herds.