Genetic variants of β-lactoglobulin, αs1-casein and β-casein of milk in East Anatolian Red cattle breed

Ulutas Z., Yildirim M.

Asian Journal of Chemistry, vol.21, no.1, pp.795-801, 2009 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 21 Issue: 1
  • Publication Date: 2009
  • Journal Name: Asian Journal of Chemistry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.795-801
  • Keywords: Bovine milk, Fat content, Genetic polymorphism, Milk yield, Rennet clotting time
  • Ondokuz Mayıs University Affiliated: No

Abstract

β-Lactoglobulin (β-Lg), αs1-casein (αs1-Cn) and β-casein (β-Cn) polymorphisms of East Anatolian Red breed cattle raised in Turkey were studied by applying starch urea gel electrophoresis. In addition, milk yield, fat content and rennet clotting time were determined. Electrophoretic analysis showed that milk samples taken from 34 East Anatolian Red cattle breed had AA, AB and BB genotypes of β-Lg, BB and BC genotypes of αs1-Cn and AA and AB genotypes of β-Cn. No differences were found for milk yield and fat content related with the genetic variants of β-Lg, αs1-Cn and β-Cn (p > 0.05). There were significant differences for rennet clotting time of milk related with the genetic variants of β-Lg and β-Cn (p < 0.05) whereas no differences were found with the genetic variants of αS1-Cn (p > 0.05). Therefore, it was concluded that selection of individual East Anatolian Red cows for AB genotype of β-Lg and AA genotype of β-Cn would bé more appropriate, due to the fact that milk from these cows are associated with lower rennet clotting time.