Daily milk, fat and protein yield and amount of somatic cells in cow milk are very important factors that influence milk performance traits. An association between polymorphisms in the kappa casein (CSN3) gene and milk production, composition and technical properties has been previously reported; however, this type of information is not available for the bovine β-carotene oxygenase 2 (BCO2) gene--the BCO2 gene has relationship with milk color and meat fat color, which is dependent on content of β-carotene. We analyzed these two genes and their relationship with milk performance traits (daily milk, fat and protein yield, somatic cell count, SCC) in one cattle population, Czech Fleckvieh (N = 152). All animals were milked twice a day and kept in the same environmental conditions. The Fleckvieh is a typical Czech cattle breed farming for milk and meat production. It is the most common breed in the Czech Republic. DNA was isolated from milk or from hairs. Genes were analyzed using PCR-RFLP, frequencies of alleles and genotypes were calculated and association analysis was performed using a GLM Procedure in SAS. Statistical analysis established that the CSN3 gene has no statistically significant influence on daily milk, fat and protein yield and SCC. Compared to other references this result can be explained by, e.g., small group of animals and different cattle breed. The BCO2 gene (genotypes AA and AG) shows a statistically significant relationship (P = 0.05) with daily milk, protein yield and SCC.
- MeSH
- DNA primery MeSH
- kaseiny genetika MeSH
- mléko MeSH
- oxygenasy se smíšenou funkcí genetika MeSH
- polymerázová řetězová reakce MeSH
- polymorfismus genetický MeSH
- sekvence nukleotidů MeSH
- skot MeSH
- zvířata MeSH
- Check Tag
- skot MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Česká republika MeSH
The goal of this work was to develop a protocol for rapid genotyping of A and G variants at the CSN2 locus and genotyping of T and C variants at the CSN3 locus in sheep breeds (Sumava and Valachian) by means of PCR and LightCycler analysis. The LightCycler technique combines rapid and efficient in vitro amplification of DNA in glass capillaries with melting curve analysis based on fluorescence resonance energy transfer for the sensitive detection of point mutation. The A variant had a greater frequency (Sumava, 0.778; Valachian, 0.835) than did variant G (Sumava, 0.222; Valachian, 0.165) in both sheep breeds. The CSN3 locus was found to be monomorphic, with no polymorphism identified in either population.
The prtP-prtM intergenic region of Lactobacillus paracasei subsp. paracasei BGHN 14 was cloned and sequenced. The nucleotide sequence of the prtP-prtM intergenic region in BGHN 14, containing divergently orientated P(prtP) and P(prtP) promoters, was shorter by 35 bp in comparison with that in lactococci. The nucleotide sequence involved in casitone-dependent transcriptional regulation of the lactococcal prt genes was not found in the BGHN14. The activity of P(prtM) in L. lactis NZ9000 was very low and insignificantly changed in the presence of casitone, whereas P(prtP) was completely inactive. When L. casei ATCC393(T) was used as host, both P(prtP) and P(prtM) were active and strongly regulated by casitone. The results strongly indicate that the mechanisms of the casitone-dependent regulation of the prt genes in BGHN14 and lactococci are different.
- MeSH
- elektroforéza v polyakrylamidovém gelu využití MeSH
- financování organizované využití MeSH
- kaseiny genetika MeSH
- Lactobacillus genetika růst a vývoj MeSH
- plazmidy genetika MeSH
- polymerázová řetězová reakce využití MeSH
- promotorové oblasti (genetika) imunologie účinky záření MeSH
- regulace genové exprese imunologie účinky záření MeSH
- sekvenční analýza metody využití MeSH
- MeSH
- autoprotilátky MeSH
- diabetes mellitus 1. typu imunologie patofyziologie prevence a kontrola MeSH
- dítě MeSH
- glukosa MeSH
- kaseiny genetika imunologie škodlivé účinky MeSH
- kojenec MeSH
- Langerhansovy ostrůvky cytologie imunologie MeSH
- lidé MeSH
- mléko imunologie škodlivé účinky MeSH
- novorozenec MeSH
- transportní proteiny genetika imunologie MeSH
- Check Tag
- dítě MeSH
- kojenec MeSH
- lidé MeSH
- novorozenec MeSH
- Publikační typ
- přehledy MeSH
