ORIGINAL PAPER
GH and CSN3 gene polymorphisms and their
impact on milk traits in cattle
1
August Cieszkowski Agricultural University of Poznań,
Department of Genetics and Animal Breeding,
Wołyńska 33, 60-637 Poznań, Poland
Publication date: 2002-01-31
Corresponding author
M. Świtoński
August Cieszkowski Agricultural University of Poznań, Department of Genetics and Animal Breeding, Wołyńska 33, 60-637 Poznań, Poland
August Cieszkowski Agricultural University of Poznań, Department of Genetics and Animal Breeding, Wołyńska 33, 60-637 Poznań, Poland
J. Anim. Feed Sci. 2002;11(1):39-45
KEYWORDS
ABSTRACT
Associations of milk production traits with growth hormone (L/V) and K-casein (A/B) gene
polymorphisms were investigated in this study. Official breeding values of genotyped 99 A l bulls for
milk, protein, fat yields as well as fat and protein contents were used to study genotype effects on the
production traits. Effects of four single-locus genotypes (LL, LV, AA and AB) and four two-loci
genotypes (AALL, AALV, ABLL and ABLV) were estimated. The AB genotype showed an advantage over the AA homozygote in terms of fat and protein contents. No significant relationships
between the GH polymorphism and the breeding values were found. The analysis of the effect of two-loci genotype reflected the relationships observed for single-locus analysis and ABLL and ABLV
genotypes were related to higher breeding values for fat (ABLV) and protein (ABLV and ABLL)
contents. The contradictory effects of the studied genetic variants are discussed.
CITATIONS (8):
1.
Effect of polymorphism of milk protein and hormone genes on milk productivity of black pied cows
L. A. Kalashnikova, Ya. A. Khabibrakhmanova, A. Sh. Tinaev
Russian Agricultural Sciences
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Russian Agricultural Sciences
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Livestock Science
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Livestock Science
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Meat Science
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Archives Animal Breeding
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Czech Journal of Animal Science
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