Czech Journal of Animal Science, 2009 (vol. 54), issue 12
Czech Journal of Animal Science - Content, Author Index, List of Reviewers Volume 54
editors
Czech J. Anim. Sci., 2009, 54(12):I-VIII | DOI: 10.17221/1747-CJAS 
Analysis of the phenotypic relationships between type traits and functional survival in Czech Fleckvieh cows
L. Zavadilová, M. Štípková, E. Němcová, J. Bouška, J. Matějíčková
Czech J. Anim. Sci., 2009, 54(12):521-531 | DOI: 10.17221/29/2009-CJAS
The phenotypic relationships between type traits and functional traits were analyzed in 47 786 Czech Fleckvieh cows first calved from 1994 to 2003. Functional survival was defined as the number of days from first calving to culling. All the cows were scored for conformation during the first lactation. Type information consisted of phenotypic type scores for 17 objectively scored linear type traits (with 9 classes each) and of the measurements for 6 body traits (measured in cm). The impact of the chosen conformation traits on functional longevity was estimated using the Cox proportional hazards model. The statistical model included the combined time-dependent...
Fatty acid composition of cow milk fat produced on low-input mountain farms
J. Frelich, M. Šlachta, O. Hanuš, J. Špička, E. Samková
Czech J. Anim. Sci., 2009, 54(12):532-539 | DOI: 10.17221/226/2009-CJAS
The fatty acid (FA) composition of bulk milk fat was examined on three mountain dairy farms in the Czech Republic. Milk samples were collected in the period of indoor grass silage feeding (November-April) and in the grazing period (May-October). In total fifty FAs were identified in the milk fat. The two-way ANOVA with factors of the farm and of the period of milk sample collection was used for the evaluation of variation in FA concentrations. Significant differences between the farms (P < 0.01) were found in the concentration of five FAs, which accounted for 30.40 g/100 g total FAs. Significant differences between the indoor and the grazing...
Effect of whole cereal grains contained in the ration on calf performance and selected morphometric parameters of the rumen and small intestine
D. Strusińska, D. Minakowski, G. Bomba, I. Otrocka-Domagała, M. Wiśniewska, J. Tywończuk
Czech J. Anim. Sci., 2009, 54(12):540-551 | DOI: 10.17221/133/2009-CJAS
The aim of this study was to determine the effect of whole maize and oat grains contained in starter concentrates on the performance of calves (during the first 90 days of their life) and selected morphometric parameters of the rumen and small intestine. The study was conducted on two groups of Holstein-Friesian calves (each of 3 males and 9 females) during the first 90 days of their life. After colostrum feeding all calves were given a milk replacer. Group 1 (control) received a concentrate (containing ground cereal grains) and meadow hay. Until 4 weeks of age group 2 (experimental) received a concentrate mixed with 25% of whole maize grains, followed...
Selection of probiotic bifidobacteria for lambs
E. Vlková, M. Grmanová, V. Rada, I. Homutová, S. Dubná
Czech J. Anim. Sci., 2009, 54(12):552-565 | DOI: 10.17221/151/2009-CJAS
Twenty-six bifidobacteria were isolated from faecal samples of lambs. The isolates were identified, functional properties (survival ability at low pH and bile conditions) and antimicrobial activities against potential pathogens were determined. From the isolates with suitable properties (13 strains) rifampicin-resistant mutants were prepared by gradient plate techniques. This property enabled us to differentiate the administered organism from wild strains because resistance to rifampicin is rare among bifidobacteria. Rifampicin-resistant bifidobacteria (RRBifs) were administered to 3-days-old lambs in two trials. In the first trial the strain B....
Effect of aromatase inhibitor (fadrozole) on proliferation, estradiol production and telomerase activity in pig granulosa cells in vitro
E. Chronowska, M. Tománek, T. Kott
Czech J. Anim. Sci., 2009, 54(12):566-574 | DOI: 10.17221/136/2009-CJAS
The objective of the present work was to study the effect of a nonsteroidal aromatase inhibitor (fadrozole) on proliferation, estradiol production, aromatase expression and telomerase activity (TA) in pig granulosa cells (GC) from small (1-2 mm) and large (5-7 mm) follicles. The cells were treated with fadrozole for 48 h and 72 h in basal and FSH-stimulated conditions. Fadrozole caused a decrease (P < 0.05) of 3H-thymidine incorporation in granulosa cells derived from small (1-2 mm) and large follicles (5-7 mm). The proliferative potential of small-follicle GC was significantly higher (P < 0.01) under all culture conditions. Estradiol...