Czech Journal of Animal Science, 2004 (vol. 49), issue 9
Herd specific effects of the ESR gene on litter size and production traits in Czech Large White sows
E. Goliášová, J. Wolf
Czech J. Anim. Sci., 2004, 49(9):373-382 | DOI: 10.17221/4321-CJAS 
The effect of PvuII polymorphism of the oestrogen receptor gene on litter size and production traits in a Czech Large White population (882 sows, 2 455 litters) was evaluated. Data were analysed by four four-trait animal models. The traits analysed were lifetime average daily gain in the field test, lean meat percentage, number of piglets born alive in parity 1 and number of piglets born alive in parity 2 and subsequent parities. The animal models differed in considering the herd-year-season effect as random or fixed and in including or not including the dominance effect. For each model two variants were calculated: the ESR effects...
The analysis of carcass value in pigs of different genotypes
M. Čechová, V. Mikule
Czech J. Anim. Sci., 2004, 49(9):383-388 | DOI: 10.17221/4322-CJAS
In an experiment the analysis of some traits of carcass value in pigs of Czech Large White and Landrace breeds differentiated according to the genotype of C-MYC and MYF4 genes was carried out. PCR-RFLP method was used for gene determination. In CLW pigs three genotypes of C-MYC gene were found out with a frequency of allele A 0.714 and B 0.286, in L pigs the BB genotype was not detected. In CLW pigs the respective frequencies of allele A and B of MYF4 gene were 0.660 and 0.340, in L breed 0.917 and 0.083. There was a statistically significant difference in the levels of...
Effects of different forage-containing rations on metabolic parameters and milk yield in the peripartum of Holstein cows
S. Yüksel, A. Hayirli, L. Turgut, M. Macit, Y. Dogru
Czech J. Anim. Sci., 2004, 49(9):389-397 | DOI: 10.17221/4323-CJAS
To evaluate the forage effects on performance and metabolic parameters, 24 Holsteins were randomly fed one of the diets containing a forage mixture with majority of alfalfa hay (AH), alfalfa silage (AS), or corn silage (CS) during the peripartum period. Milk production and dry matter intake (DMI) were recorded daily; body weight (BW) was measured and blood/urine samples were collected on day -21, 1, and 15 relative to parturition. The diets did not affect prepartum and postpartum BW changes and milk production. During the prepartum, DMI for cows fed hay was higher than for cows fed silages. During the postpartum, DMI was the highest for cows fed diet...
The influence of various leguminous seed diets on carcass and meat quality of fattening pigs
R. Leikus, K. Triukas, G. Švirmickas, V. Juškiene
Czech J. Anim. Sci., 2004, 49(9):398-406 | DOI: 10.17221/4324-CJAS
Two trials were designed to determine the quality of pig carcasses, chemical composition and physical indicators of meat and fatty acid composition of backfat. Growing pigs were offered adequate diets containing field beans (20-25%), sweet lupines (15-20%) or extruded soybeans (18-15.4%) instead of soybean or sunflower oil meal (control). The weight and length of the carcass, dressing percentage, weight of ham, chemical composition and physical indicators of meat of pigs fed diets with different leguminous seeds did not differ significantly from those of pigs fed the control diet. Pigs fed diets containing field beans had 5.7-8.2 mm lower backfat thickness,...
Effect of age upon utilisation of iron in chickens
E. Fajmonová, J. Zelenka, K. Holendová
Czech J. Anim. Sci., 2004, 49(9):407-410 | DOI: 10.17221/4325-CJAS
The effect of age upon iron retention in cockerels of laying and meat type hybrids was examined within 46 subsequent balance periods. Chickens were fed ad libitum a diet with the content of 312 mg Fe per 1 kg. The dependence of Fe utilisation upon age from Day 3 to Day 100 was expressed by the second degree parabolas with minimum values in the tenth week of age. The dependence of Fe content in weight gains on age was highly significant (P < 0.01). The course of this dependence was expressed by parabolas with minimum values on Day 38 and Day 28 in slow and fast growing chickens, resp. The growth rate of total amount of Fe in the...
Effects of dietary organic selenium supplementation on selenium content, antioxidative status of muscles and meat quality of pigs
B. Bobček, R. Lahučký, J. Mrázová, R. Bobček, K. Novotná, D. Vašíček
Czech J. Anim. Sci., 2004, 49(9):411-417 | DOI: 10.17221/4326-CJAS
The effects of feeding a high level of organic selenium on the level of selenium, antioxidative status of m. longissimus lumborum et thoracis (MLLT) and m. semimembranosus (MSM) and meat quality of pigs (defined on malignant hyperthermia status, DNA based test) were investigated. Treatments consisted in supplementation of organic selenium (0.3 mg Se/kg diet) for the last 97 days to finishing pigs (basic diet with 0.18 mg Se/kg diet) before slaughter. MLLT was further examined for pH (45 min, 24 h), colour and conductivity (24 h), drip loss (48 h) and myofibrillar fragmentation index (MFI, 5 days). Chemical composition (protein,...