DOI QR코드

DOI QR Code

MILK PROTEIN POLYMORPHISMS AS GENETIC MARKER IN KOREAN NATIVE CATTLE

  • Chung, E.R. (Department of Dairy Science, College of Agriculture Sang Ji University) ;
  • Han, S.K. (Department of Dairy Science, College of Animal Husbanduy,Kon Kuk University) ;
  • Rhim, T.J. (Department of Dairy Science, College of Agriculture Sang Ji University)
  • Received : 1994.06.13
  • Accepted : 1994.12.10
  • Published : 1995.04.01

Abstract

Genetic variants of ${\alpha}s_1$-casein, ${\beta}$-casein, ${\kappa}$-casein and ${\beta}$-lactoglobulin were investigated by starch urea gel electrophoresis in milk samples of 280 Korean native cattle. A new ${\beta}$-casein variant, designated ${\beta}$-casein $A^4$, was found in milk samples of Korean native cattle. It has a much slower electrophoretic mobility than the ${\beta}$-casein $A^3$ variant in acid gel. This new variant appeared together with either ${\beta}$-casein $A^1$, $A^2$ or B variant. Gene frequencies and genotypic frequencies were estimated. Gene frequencies of four milk protein loci in Korean native cattle were compared with those of imported cattle breeds raised in Korea and Japanese brown cattle. Gene frequencies were ${\alpha}s_1$-casein B .846, ${\alpha}s_1$-casein C .154; ${\beta}$-casein $A^1$ .216, ${\beta}$-casein $A^2$ .666, ${\beta}$-casein $A^4$ .048, ${\beta}$-casein B .070; ${\kappa}$-casein A .648, ${\kappa}$-casein B .352; ${\beta}$-lactoglobulin A .148, ${\beta}$-lactoglobulin B .852. The population was in Hardy-Weinberg equilibrium at all milk protein loci. Gene frequencies of Korean native cattle were very similar to those of Japanese brown cattle. Interestingly, a new variant, ${\beta}$-casein $A^4$, was found only in Korean native cattle and Japanese brown cattle. These results support the hypothesis that Korean native cattle were used in the development of the Japanese brown cattle.

Keywords

Milk Proteins;Genetic Polymorphisms;Genetic Markers;Korean Native Cattle

Cited by

  1. Nomenclature of the Proteins of Cows’ Milk—Sixth Revision vol.87, pp.6, 2004, https://doi.org/10.3168/jds.S0022-0302(04)73319-6
  2. Bovine kappa-casein gene polymorphism and its association with milk production traits vol.31, pp.4, 2008, https://doi.org/10.1590/S1415-47572008005000001
  3. gene polymorphism in Nili-ravi buffalo, Achai and Sahiwal cattle of Pakistan vol.68, pp.1, 2014, https://doi.org/10.1111/1471-0307.12146