scholarly journals DRB3 Gene Polymorphism and Somatic Cell Count in Milk of Jersey Cows

2010 ◽  
Vol 9 (9) ◽  
pp. 1295-1300 ◽  
Author(s):  
Katarzyna Wojdak-Mak ◽  
M. Kmiec ◽  
Inga Kowalewska ◽  
M. Warlinski
Keyword(s):  
Gene Polymorphism ◽  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Jersey Cows

A Study on Somatic Cell Count of Jersey Cows

2010 ◽  
Vol 5 (4) ◽  
pp. 253-259 ◽  
Author(s):  
H. Erdem ◽  
S. Atasever ◽  
E. Kul
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Jersey Cows

The MUC 1 gene polymorphism is not associated with milk productive traits and somatic cell count in Jersey cattle

2019 ◽  
Vol 50 (2) ◽  
pp. 188-189
Author(s):  
Lucas Vargas ◽  
Daniel Duarte Silveira ◽  
Rogério Fôlha Bermudes ◽  
Heden Luiz Marques Moreira ◽  
Anibal Eugênio Vercesi Filho ◽  
...  
Keyword(s):  
Gene Polymorphism ◽  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Jersey Cattle ◽  
Productive Traits

scholarly journals Associations between Leptin Gene Polymorphisms and Somatic Cell Count in Milk of Jersey Cows

2010 ◽  
Vol 79 (2) ◽  
pp. 237-242 ◽  
Author(s):  
Hanna Kulig ◽  
Marek Kmieć ◽  
Katarzyna Wojdak-Maksymiec
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Gene Polymorphisms ◽  
Somatic Cell Count ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
Exon 2 ◽  
Jersey Cows ◽  
Intron 2 ◽  
Genotype And Allele Frequencies

A total of 181 Jersey cows were used to investigate how leptin gene polymorphisms affect somatic cell count (SCC) in milk. Three single nucleotide polymorphisms were genotyped, namely the R4C polymorphism in exon 2, the Sau3AI polymorphism in intron 2 and the A59V polymorphism in exon 3. The genotype and allele frequencies for each polymorphism and the haplotype frequencies for all polymorphisms were estimated in the herd under study. Statistical analysis revealed that the R4C and Sau3AI polymorphisms significantly affected SCC (P &#x2AAC 0.01) with C and T as a desirable allele, respectively. No associations were found between the A59V polymorphism and SCC in this study. However, all the genotype combinations (haplotypes) significantly affected this trait. The results indicate that selection for the R4C CC and Sau3AI TT animals might contribute to a reduction of SCC in Jersey cattle.

scholarly journals Genetic relationships of alternative somatic cell count traits with milk yield, composition and udder type traits in Italian Jersey cows

2019 ◽  
Vol 90 (7) ◽  
pp. 808-817 ◽  
Author(s):  
Tania Bobbo ◽  
Chiara Roveglia ◽  
Mauro Penasa ◽  
Giulio Visentin ◽  
Raffaella Finocchiaro ◽  
...  
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Milk Yield ◽  
Somatic Cell Count ◽  
Genetic Relationships ◽  
Type Traits ◽  
Jersey Cows

scholarly journals Associations between bovine lactoferrin gene polymorphism and somatic cell count in milk

2012 ◽  
Vol 51 (No. 1) ◽  
pp. 14-20 ◽  
Author(s):  
K. Wojdak-Maksymiec ◽  
M. Kmiec ◽  
J. Ziemak
Keyword(s):  
Gene Polymorphism ◽  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Bovine Lactoferrin ◽  
Logarithmic Scale ◽  
Black And White ◽  
Holstein Friesian ◽  
Pcr Rflp ◽  
Lactoferrin Gene

The study included 124 Polish Black-and-White dairy cows of various share of the Holstein-Friesian (HF) breed. Lactoferrin (LTF) gene polymorphism was obtained with PCR-RFLP method using EcoRI enzyme. Two alleles of LTF, A and B, were found in the studied population. Their frequencies were 67.74% and 32.56%, respectively. The alleles controlled the occurrence of three genotypes: AA, BB and AB, of frequencies equal to 37.90%, 2.42% and 59.68%, respectively. It was established that statistically significant associations exist between the somatic cell count (SCC) and LTF genotype, lactation month and parity as well as the HF gene share. No significant association was found between somatic cell count and season. The highest somatic cell count (transformed to a logarithmic scale) was found in milk of the AB genotype, whereas the lowest one was found in cows of the AA genotype.

scholarly journals Associations between microsatellite polymorphism within the macrophage expressed lysozyme (mLys) gene and milk Indices Properties in Polish Black-and-White Cows

2005 ◽  
Vol 53 (2) ◽  
pp. 99-106
Author(s):  
Małgorzata Walczak-Wójciak ◽  
Janusz Klupczyński ◽  
Jan Miciński ◽  
Martin Hošek
Keyword(s):  
Gene Polymorphism ◽  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Production Capacity ◽  
Bacterial Count ◽  
Mineral Elements ◽  
Technological Properties ◽  
Black And White ◽  
Pathogenic Factors

The experiment was performed in the years 1998–2000 on two farms located near to Vistula Lowlands. The experimental materials were comprised of 52 daughters of bull Paran, among which 21 possessed the mLys-mic 7 allele and 31 – the mLys-mic 3 allele. The serum and whey bacteriolytic activity of the lysozyme, concentrations of selected mineral elements, technological properties of milk at successive the first lactation stages (30, 100, 150 and 200 days), somatic cell count and bacterial count were investigated in this study. The results obtained indicate that Lys-mic polymorphism has low suitability as a marker for milk production capacity in cows. The lysozyme gene, treated as a mastitis resistance factor, showed no effects on somatic cell count and bacterial count. Further investigations, conducted not only during the first lactation, but also during the next lactation in a herd threatened by a variety of pathogenic factors, would be carried to validate this Lys-mic gene polymorphism on mastitis resistance.

scholarly journals Once-a-day milking: possible and profitable?

2002 ◽  
pp. 33-37 ◽  
Author(s):  
M.J. Tong ◽  
D.A. Clark ◽  
C.V. Cooper
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Bacterial Infections ◽  
Milk Composition ◽  
Stocking Rate ◽  
System A ◽  
Milking Frequency ◽  
Farm System ◽  
Jersey Cows

Once-a-day (OAD) milking offers a major opportunity to improve labour output on New Zealand farms. However few full lactation studies have been undertaken to investigate the effect of this strategy on the productivity of the farm system. A trial was established in 2000 to measure the effect of milking frequency and breed in farm systems where stocking rate was adjusted to equalise per hectare feed demand in different herds. There were four treatments: two herds of 35 Friesian and 42 Jersey cows, at 3.5 and 4.2 cows/hectare respectively, were milked OAD for the entire season. Another two herds of 30 Friesian and 36 Jersey cows, at 3.0 and 3.6 cows/ hectare respectively, were milked twice a day. A higher stocking rate was used for the two OAD herds in an attempt to compensate for the effects of the expected decrease in feed eaten. In the Jersey herd, milking OAD resulted in decreased milksolids (MS) yield per cow and per hectare of 22% and 9% respectively. In the Friesians the corresponding decrease was 31% per cow and 19% per hectare. OAD milking resulted in significantly higher protein and milksolids concentrations, and lower lactose concentration. Mean individual somatic cell count was significantly increased by OAD milking, despite the absence of any differences in levels of bacterial infections between herds. The reduction in MS yield per cow and per hectare was smaller for the Jersey herd than the Friesian herd, indicating that the Jersey cow is perhaps better suited to OAD milking. Keywords: farm system, Friesians, Jerseys, milksolids, milk composition, once-a -day milking, somatic cell count

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