GENETIC POLYMORPHISM OF SOME PROTEINS IN THE MILK OF CARPATHIAN GOAT

Authors

  • MIHAELA ZAULET University of Bucharest, Faculty of Biology, Romania
  • STELIANA KEVORKIAN University of Bucharest, Faculty of Biology, Romania
  • MIHAELA ENACHE University of Bucharest, Faculty of Biology, Romania
  • ELENA GHITA INCDBNA Balotesti, Romania
  • CRISTINA LAZAR INCDBNA Balotesti, Romania
  • MARIANA REBEDEA University of Bucharest, Faculty of Biology, Romania

Keywords:

goats, milk polymorphism, casein

Abstract

The paper presents some aspects of the polymorphism of some Carpathian goat milk
proteins. The Carpathian breed is the main breed of goats reared in Romania. The
optimal working conditions were determined for the identification of the casein
phenotypes. The technique of the polyacrylamide gel electrophoresis was used. The
milk samples were processed to remove the fat and whey and the migration was
done in the presence of a standard sample which contained proteins with different
molecular weights. The interpretation of the electrophoresis migrations revealed the
presence of two genotypes, the homozygous genotype β-Cn BB and the heterozygous
β-Cn AB. The homozygous genotype β-Cn AA was not identified in any individual.
The heterozygous genotype β-Cn AB displayed a high frequency (59%) and it was
observed in 10 individuals. The homozygous genotype β-Cn BB was observed in 7
individuals and it had a frequency of 41%. The homozygous genotype β-Cn AA has
not been identified in the studied population. The distribution of these genotypes
showed that allele β-CnB was predominant (70%) over allele β-can (30%).

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Published

2023-11-01