This article examines the relationship between shape, size and of udder Bushuev cows on different categories farms their milk yield. It was determined that yield belonging to form bowl-shaped in all higher from 720.9 kg 641.8 than peers round udder. In comparison, with a cup-shaped 3.3 cm 2.2 wider, length 9.1 7.8 longer, circumference 6.3 8.7 bigger, depth 1.6 2.7 nipple diameter 0.06 0.35 cm,...

Analysis was made of the relationship between conformation traits and lifetime production efficiency of the cows that first calved in 2000 and represented the active population in the Pomorze and Kujawy regions of Poland. The CORR Pearson procedures of SAS package were used in the statistical calculations. It was found that there is a statistically significant relationship, weak or low on the G...

To determine whether tail docking would influence cow cleanliness and udder health in a free-stall system, we monitored milking cows after half the animals in a herd were docked. A sample of 223 docked and 190 undocked cows (reducing to 169 and 105 over the study as cows were dried off) were monitored for 8 wk. Cow cleanliness was scored in two areas: along the spine, and the rump adjacent to t...

Hum mel, R., G . L e h man n : Bovine coagulase-negative Staphylococci: Biochemistry and Polymerase Chain Reaction. Acta vet. Brno, 63,1994: 133-139. Staphylococcus (S.) simulans, S. chromogenes, and S. epidermidis were the species of coagulase-negative staphylococci (CNS) most frequently involved in subclinical mastitits of dairy cattle. The same biochemical features characterized the successi...

The present study was performed to study the genetic relationship of productive life with production and type traits of Korean Holsteins at first three lactations. The data for the analysis from 56,054, 28,997, and 11,816 animals of first, second and third parity cows which were born from 2006 to 2011 were collected by Dairy Cattle Improvement Center, National Agricultural Co-operative Federati...

The value of electric conductivity (EC), California Milk Cell Test (CMCT) and somatic cell count (SCC) as diagnostic tools was investigated in dairy goats. Conductivity colour reading correlated with SCC. Milk samples with conductivity colour red had significantly higher SCC than those with conductivity colours green and orange (P < 0.001). There were moderate positive correlations between CMCT...

Occurrence of milk ejection and course of milk removal were investigated in 18 dairy cows at milking intervals of 4, 8 and 12 h in early, mid or late lactation. Milk ejection occurred fastest in early lactation at a milking interval of 12 h and was delayed at short milking intervals and in late lactation. Storage capacity of the udder was estimated and the actual milk yields of experimental mil...

(Co)variance components for final score and 15 linear types traits of Jersey cows were estimated by multitrait REML using multiple diagonalization and a repeatability model with 34,999 records of 22,354 cows. Multiple diagonalization gave relative off-diagonals (ratio of squared off-diagonals to the product of diagonals) of < 0.1%. Heritabilities and repeatabilities, respectively, were estimate...

We hypothesized that accumulation of milk would influence gene expression in the mammary gland of lactating dairy cows. To test this hypothesis, we enrolled 4 multiparous Holstein cows (150 ± 10 DIM) in a half-udder milk stasis experiment. On d 1 of the experiment, right udder halves were milked at 0430 h and 1430 h. On d 2 of the experiment, right udder halves were milked at 0430 h and mammary...

genetic and phenotypic parameters related to production traits, udder conformation and somatic cell count for the iranian holstein cows were estimated. monthly records of somatic cell counts (scc) were primarily transformed into somatic cell scores (scs) and the the average level of lactation period, with correction for milk volume, was calculated. by use of these estimates an udder health inde...