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Details for article 32 of 39 found articles
| Title: |
THE INFLUENCE OF K-CASEIN ALLELES ON MILK PRODUCTION AND QUALITY IN A HOLSTEIN-FRISIAN COW POPULATION |
| Author: |
BENCSIK I. PĂCALĂ N. STANCULET JANA TELEA ADA BENCSIK ALENA |
| Appeared in: |
Lucrari stiintifice. Zootehnie si biotehnologii |
| Paging: | Volume 40 (2007) nr. 1 pages 13-18 |
| Year: |
2007 |
| Contents: |
Milk production and its composition are determined by quantitative loci, whichunder the influence of some environmental factors are producing an allelicvariability, meaning a genetic polymorphism of the gene. K-casein is a milk proteinwhose genetic polymorphism can serve as molecular marker for milk production,composition and industrial processing suitability. The allelic variants for k-casein Aand B are the most common and the most important of them. The experiments wereconducted on 24 Holstein-Friesian milking cows from a private farm in Giroc. Themilk production on a normal lactation is 8444 milk kg/305 days, with a fat percentof 3.9 and a protein percent of 3.3. The cows were divided in three groups AA, ABand BB in function of the genotyped obtained after the allelic variantsdetermination. The DNA isolation was made from hair roots and blood, the cowpopulation studied is not in genetic equilibrium fore k-casein gene, the frequency ofallele A is 0.43 and the frequency of B allele is 0.58. The highest genotype frequencywas 0.5 for CSN3-AB genotype, the BB genotype had 0.33 frequency, and the lowestfrequency was 0.17 for AA genotype. The mean daily milk production from cowswith BB genotype for k-casein is significant (p<5%) higher compared to the allelicvariant AA. The fat percent is significant higher at the allelic variant AA comparedto the other allelic variants (AB and BB) of the k-casein gene. Between the fatpercent of the three genotypes variants of K-casein (AA, AB and BB) there are nosignificant differences. |
| Publisher: |
Facultatea de Zootehnie si Biotehnologii, Timisoara (provided by DOAJ) |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 32 of 39 found articles
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