Template-Type: ReDIF-Article 1.0 Author-Name: E. Goliášová Author-Workplace-Name: , J. W 2 1Department of Genetics, Mendel University of Agriculture and Forestry, Brno, Czech Republic Author-Name: J. Wolf Author-Workplace-Name: , J. W 2 1Department of Genetics, Mendel University of Agriculture and Forestry, Brno, Czech Republic Title: Herd specific effects of the ESR gene on litter size and production traits in Czech Large White sows Abstract: 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 were calculated either across herds or within herds. On the genetic level, no significant overall effects of the ESR gene were detected. The effects of the ESR gene within herds were mostly insignificant as well. There was a certain tendency for allele A to increase litter size in parity 1. Nevertheless, on the basis of the present knowledge, the use of the ESR gene for selection for litter size in the Czech Large White breed seems to be of questionable benefit and cannot be recommended. Keywords: pig, reproduction, litter size, candidate gene, ESR Journal: Czech Journal of Animal Science Pages: 373-382 Volume: 49 Issue: 9 Year: 2004 DOI: 10.17221/4321-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/4321-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200409-0001.txt Handle: RePEc:caa:jnlcjs:v:49:y:2004:i:9:id:4321-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: M. Čechová Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Czech Republic Author-Name: V. Mikule Author-Workplace-Name: Mendel University of Agriculture and Forestry, Brno, Czech Republic Title: The analysis of carcass value in pigs of different genotypes Abstract: 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 MLLT area (P ≤ 0.05) between the genotypes AA, AB and BB of C-MYC gene in CLW pigs. In this breed statistically significant differences (P ≤ 0.05) were detected between the genotypes AA and AB in these traits: MLLT area, percentage of main lean cuts and weight of main lean cuts in favour of genotype BB of MYF4 gene. We did not find any significant differences in the measured levels of carcass value traits between different genotypes of MYF4 gene in L breed. Keywords: pig, breed, carcass value, genotype, C-MYC, MYF4 Journal: Czech Journal of Animal Science Pages: 383-388 Volume: 49 Issue: 9 Year: 2004 DOI: 10.17221/4322-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/4322-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200409-0002.txt Handle: RePEc:caa:jnlcjs:v:49:y:2004:i:9:id:4322-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: S. Yüksel Author-Workplace-Name: , A. H 2, L. T 3, M. M 3, Y. D 4 1Eastern Anatolia Agricultural Research Station, Dadaskent, Erzurum, Turkey Author-Name: A. Hayirli Author-Workplace-Name: , A. H 2, L. T 3, M. M 3, Y. D 4 1Eastern Anatolia Agricultural Research Station, Dadaskent, Erzurum, Turkey Author-Name: L. Turgut Author-Workplace-Name: , A. H 2, L. T 3, M. M 3, Y. D 4 1Eastern Anatolia Agricultural Research Station, Dadaskent, Erzurum, Turkey Author-Name: M. Macit Author-Workplace-Name: , A. H 2, L. T 3, M. M 3, Y. D 4 1Eastern Anatolia Agricultural Research Station, Dadaskent, Erzurum, Turkey Author-Name: Y. Dogru Author-Workplace-Name: , A. H 2, L. T 3, M. M 3, Y. D 4 1Eastern Anatolia Agricultural Research Station, Dadaskent, Erzurum, Turkey Title: Effects of different forage-containing rations on metabolic parameters and milk yield in the peripartum of Holstein cows Abstract: 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 AH, followed by cows fed diets CS and AS. The diets did not affect serum glucose, Ca, P, and K concentrations. Serum blood urea nitrogen (BUN) concentration for cows fed diet CS was lower than for cows fed diet AS. Cows fed diet AH had the highest alkaline phosphatase (ALP) activity. Serum cation-anion difference (SCAD) for cows fed AS was lower than for cows fed CS. Serum Ca concentration was not correlated with SCAD and ALP values, but Ca : P ratio was negatively correlated with serum K concentration. The diets did not influence urine pH and urine cation-anion difference (UCAD) value. Urine Ca concentration and Ca : P ratio for cows fed CS were higher than those for cows fed AS. Urine pH was positively correlated with urine K concentration and UCAD value. In conclusion, the forage type did not affect prepartum performance. Silage, regardless of the kind, was advantageous over hay during the postpartum. Keywords: hay, silage, forage, periparturient period, metabolite, cow Journal: Czech Journal of Animal Science Pages: 389-397 Volume: 49 Issue: 9 Year: 2004 DOI: 10.17221/4323-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/4323-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200409-0003.txt Handle: RePEc:caa:jnlcjs:v:49:y:2004:i:9:id:4323-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: R. Leikus Author-Workplace-Name: Institute of Animal Science of Lithuanian Veterinary Academy, Baisogala, Lithuania Author-Name: K. Triukas Author-Workplace-Name: Institute of Animal Science of Lithuanian Veterinary Academy, Baisogala, Lithuania Author-Name: G. Švirmickas Author-Workplace-Name: Institute of Animal Science of Lithuanian Veterinary Academy, Baisogala, Lithuania Author-Name: V. Juškiene Author-Workplace-Name: Institute of Animal Science of Lithuanian Veterinary Academy, Baisogala, Lithuania Title: The influence of various leguminous seed diets on carcass and meat quality of fattening pigs Abstract: 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, while pigs fed extruded soybeans had 6.6-7.9% smaller loin lean area and 4.57% lower content of oleic acid in the backfat, but the content of linoleic acid was 5.11% higher. Keywords: pigs, leguminous seeds, carcass, meat, backfat, fatty acids Journal: Czech Journal of Animal Science Pages: 398-406 Volume: 49 Issue: 9 Year: 2004 DOI: 10.17221/4324-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/4324-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200409-0004.txt Handle: RePEc:caa:jnlcjs:v:49:y:2004:i:9:id:4324-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: E. Fajmonová Author-Workplace-Name: Faculty of Agronomy, Mendel University of Agriculture and Forestry, Brno, Czech Republic Author-Name: J. Zelenka Author-Workplace-Name: Faculty of Agronomy, Mendel University of Agriculture and Forestry, Brno, Czech Republic Author-Name: K. Holendová Author-Workplace-Name: Faculty of Agronomy, Mendel University of Agriculture and Forestry, Brno, Czech Republic Title: Effect of age upon utilisation of iron in chickens Abstract: 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 body was by 6 per cent lower (P < 0.01) than that of live weight of chickens. Keywords: chickens, age, growth rate, iron retention Journal: Czech Journal of Animal Science Pages: 407-410 Volume: 49 Issue: 9 Year: 2004 DOI: 10.17221/4325-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/4325-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200409-0005.txt Handle: RePEc:caa:jnlcjs:v:49:y:2004:i:9:id:4325-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: B. Bobček Author-Workplace-Name: , R. L 2, J. M 1, R. B 3, K. N 2, D. V 2 1Slovak University of Agriculture, Nitra, Slovak Republic Author-Name: R. Lahučký Author-Workplace-Name: , R. L 2, J. M 1, R. B 3, K. N 2, D. V 2 1Slovak University of Agriculture, Nitra, Slovak Republic Author-Name: J. Mrázová Author-Workplace-Name: , R. L 2, J. M 1, R. B 3, K. N 2, D. V 2 1Slovak University of Agriculture, Nitra, Slovak Republic Author-Name: R. Bobček Author-Workplace-Name: , R. L 2, J. M 1, R. B 3, K. N 2, D. V 2 1Slovak University of Agriculture, Nitra, Slovak Republic Author-Name: K. Novotná Author-Workplace-Name: , R. L 2, J. M 1, R. B 3, K. N 2, D. V 2 1Slovak University of Agriculture, Nitra, Slovak Republic Author-Name: D. Vašíček Author-Workplace-Name: , R. L 2, J. M 1, R. B 3, K. N 2, D. V 2 1Slovak University of Agriculture, Nitra, Slovak Republic Title: Effects of dietary organic selenium supplementation on selenium content, antioxidative status of muscles and meat quality of pigs Abstract: 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, intramuscular fat) was also estimated. Concentration of Se (spectrofluorometric method) and antioxidative status (rate of oxidation by stimulation with Fe2+/ascorbate, production of malondialdehyde - MDA) were estimated in muscle samples obtained post mortem. The level of selenium was more than twice higher (P < 0.05) in muscles from pigs treated with higher selenium than in controls (0.377 vs. 0.922 mg/kg - MLLT and 0.377 vs. 0.836 mg/kg - MSM). The rate of oxidation was positively (P < 0.05) influenced by Se supplementation. Tendencies to lower drip losses were observed in MLLT of pigs supplemented with Se but the differences were not significant (P > 0.05). We concluded that dietary organic Se supplementation (0.3 mg Se/kg diet) to basic diet (0.18 mg Se/kg diet) of finishing pigs significantly increased the selenium concentration and improved the antioxidative status of muscle tissue. Keywords: pigs, selenium, antioxidative status, meat quality Journal: Czech Journal of Animal Science Pages: 411-417 Volume: 49 Issue: 9 Year: 2004 DOI: 10.17221/4326-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/4326-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200409-0006.txt Handle: RePEc:caa:jnlcjs:v:49:y:2004:i:9:id:4326-CJAS