Czech Journal of Animal Science, 2010 (vol. 55), issue 11
ANXA9, SLC27A3, FABP3 and FABP4 single nucleotide polymorphisms in relation to milk production traitsin Jersey cows
H. Kulig, I. Kowalewska-Łuczak, M. Kmieć, K. Wojdak-Maksymiec
Czech J. Anim. Sci., 2010, 55(11):463-467 | DOI: 10.17221/1714-CJAS 
Milk components originating from blood plasma substrates are synthesized in epithelial cells of the mammary gland. Milk lipids are synthesized from fatty acids which bind to specific proteins - FABPs (fatty acid binding proteins). FABPs are a family of small cytoplasmic proteins; nine members of the family have been identified so far (FABP1-FABP9) (Chmurzyńska et al., 2006). Their main roles include fatty acid uptake, transport and metabolism. FABPs can modulate the fatty acid concentration in cells and therefore they affect different cellular processes, especially lipid metabolism. FABP3 and FABP4 are present in tissues with a high demand...
Non-structural carbohydrates in the nutrition of high-yielding dairy cows during a transition period
K. Poláková, V. Kudrna, A. Kodeš, B. Hučko, Z. Mudřík
Czech J. Anim. Sci., 2010, 55(11):468-478 | DOI: 10.17221/873-CJAS
The main aim of this study was to investigate experimentally the effect of different composition of non-structural carbohydrates (NFC) in prepartum feed rations administered to high-yielding dairy cows at a high concentration of NFC in the diet on dry matter intake both before and after parturition and on subsequent milk performance, body condition and physiological traits of rumen fluid and blood. Thirty-six high-yielding dairy cows were allocated into one of the three well-balanced groups (K, O, and C), and each group received a different feeding rations. Feeding rations differed in non-structural carbohydrate (NFC) structure. The "K" (control) group...
Meat quality and fatty acid profile of the musculus longissimus lumborum in Czech Fleckvieh, Charolais and Charolais × Czech Fleckvieh bulls fed different types of silages
L. Bartoň, D. Bureš, V. Kudrna
Czech J. Anim. Sci., 2010, 55(11):479-487 | DOI: 10.17221/1713-CJAS
The effects of breed and diet containing different types of silages on meat quality parameters and fatty acid profile of m. longissimus lumborum (MLL) were evaluated in a total of 30 Czech Fleckvieh (CF), Charolais (CH) and Charolais × Czech Fleckvieh (CH × CF) bulls. The animals were fed two mixed diets: MS (based on maize silage) and LCS (based on legume-cereal mixture silage and lucerne silages) with different concentrations of dietary energy and fatty acids. The MLL from CH bulls had the lowest content of dry matter (P < 0.01), less protein (P < 0.01) and lighter meat (P < 0.01) compared to the CF. The extensive LCS diet...
Activities of N-acetyl-β-d-glucosaminidase and glutathione peroxidase in bovine colostrum and milk
M. Kankofer, E. Albera, M. Różańska-Boczula
Czech J. Anim. Sci., 2010, 55(11):488-495 | DOI: 10.17221/1716-CJAS
Parturition and post partum period are susceptible for antioxidative/oxidative imbalance as well as inflammatory processes related to either uterus or mammary gland. Fifteen Holstein-Friesian cows were used to examine the relationship between the antioxidant enzyme glutathione peroxidase (GSH-Px) and inflammatory enzyme N-acetyl-glucosaminidase (NAGase) in colostrum and milk during 12 days after parturition. Samples from each udder quarter were collected immediately after parturition, after 24 h and 48 h as well as after 6 and 12 days post partum. The activity of GSH-Px was measured spectrophotometrically and NAGase spectrofluorimetrically. NAGase...
Enhancing unsaturated fatty acids in ewe's milk by feeding rapeseed or linseed oil
A. Cieslak, J. Kowalczyk, M. Czauderna, A. Potkanski, M. Szumacher-Strabel
Czech J. Anim. Sci., 2010, 55(11):496-504 | DOI: 10.17221/874-CJAS
The aim of our research was to evaluate whether rapeseed and linseed oils used as feed additives to ewe's diets allow to achieve the higher secretion of unsaturated fatty acids into milk with extended emphasis on the conjugated linoleic acid concentration. Two experiments were carried out on 6 lactating ewes in two independent 3 × 3 Latin square designs. In each feeding cycle the animals were subjected to one of the treatments: (1) without oil supplementation, (2) with 3.5% of rapeseed oil (RS) or linseed oil (LS), (3) with 7.0% of rapeseed oil or linseed oil. Feeding diets rich in mono- and polyunsaturated fatty acids to lactating ewes under our experimental...
Effect of inorganic or organic selenium supplementation on productive performance, egg quality and some physiological traits of dual-purpose breeding hens
Y.A. Attia, A.A. Abdalah, H.S. Zeweil, F. Bovera, A.A. Tag El-Din, M.A. Araft
Czech J. Anim. Sci., 2010, 55(11):505-519 | DOI: 10.17221/1715-CJAS
One hundred and twenty (100♀ + 20♂) 30-weeks-old dual-purpose breeding hens of Gimmizah strain were housed in individual cages in a semi-open house. Birds were distributed randomly into five treatments of 20♀ + 4♂. The 1st treatment was fed a control (unsupplemented) diet (17.5% CP and 11.4 MJ per kg diet) containing 0.10 mg Se/kg (low level). The 2nd, 3rd, 4th and 5th treatments were fed the control diet supplemented with 0.15 and 0.30 mg Se/kg from inorganic (sodium selenite) and organic (selenomethionine, as Se-yeast Selplex® Alltech, Nicholasville, USA) sources, respectively. The total concentration of Se in experimental...