TITLE

GENETIC DIVERSITY IN MILK PROTEINS AMONG ESTONIAN DAIRY CATTLE

AUTHOR(S)
Värv, Sirje; Belousova, Anastassia; Sild, Erkki; Viinalass, Haldja
PUB. DATE
December 2009
SOURCE
Veterinarija ir Zootechnika;2009, Vol. 48 Issue 70, p93
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The aim of the study was to determine the main polymorphisms in casein beta (CSN2), casein kappa (CSN3) and lactoglobulin beta (LGB) genes in Estonian dairy cattle and compare these among breeds. The study was based on 7 single nucleotide polymorphisms among 122 individuals from three cattle breeds. Allele and genotype frequencies were calculated, and Hardy-Weinberg equilibrium and genotypic disequilibrium tests were performed. Genotypic differentiation was statistically significant between Estonian Red and Estonian Native cattle and between Estonian Red and Estonian Holstein cattle. Regarding CSN3, Estonian Holstein were characterized by a high genotype AA frequency in comparison with the other common AB genotype and higher A-allele and AB genotype frequency for LGB. The proportion of uncommon CSN3 B-allele (BB and BE genotypes) in the studied breeds was higher in the Estonian Red. For CSN2, the A2 allele occurred more frequently in Holstein and Estonian Native cattle than in Estonian Red. The studied genetic variants of milk proteins influence milk yield, milk composition and may have a range of implications for human health. Utilization of natural genetic resources represented by local breeds is helpful in cattle breeding, and in sustaining the breeds.
ACCESSION #
48001910

 

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