Czech Journal of Animal Science, 2007 (vol. 52), issue 1

Study of an association between SNP 775C>T within the bovine ITBG2 gene and milk performance traits in Black and White cows

U. Czarnik, M. Galiński, Ch.S. Pareek, T. Zabolewicz, Z. Wielgosz-Groth

Czech J. Anim. Sci., 2007, 52(1):1-6 | DOI: 10.17221/2329-CJAS  

The exclusive pre-selective effect of BLAD carriers reproducing in the exposed Holstein-Friesian cattle population prompted to search for the candidate gene variants of high quality of milk performance traits within the bovine ITBG2 gene or loci linked with bovine ITBG2 gene. Theoretical considerations indicated that the &Idquo;silent mutation" C→T localized at the position of 775 bp of the gene encoding the CD18 subunit might be a potential QTL marker of high milk productivity. An association study between the polymorphism of SNP 775C>T, and the diversification of milk performance traits was carried out on the progeny of...

An economic impact of inbreeding in the purebred population of Pinzgau cattle in Slovakia on milk production traits

R. Kasarda, O. Kadlečík

Czech J. Anim. Sci., 2007, 52(1):7-11 | DOI: 10.17221/2330-CJAS  

An increase of inbreeding in a small, endangered population is one of the important criterions in the evaluation of the degree of endangerment of the given breed. The aim was to determine an economic impact of inbreeding in the purebred population of Pinzgau cattle in Slovakia on milk production traits. Pedigree information on 1 611 purebred Pinzgau cows under milk recording was used for the analysis. Average production was 3 898 kg of milk, with 3.93% of fat and 3.31% of proteins. The pedigree of each cow was completed maximally to the 4th generation. Simultaneously, the results from a genetic evaluation of milk production traits such as milk production...

Histological structure of the musculus longissimus lumborum et thoracis in pigs with the same ryanodine receptor genotype (CC) in relation to carcass indicators

Z. Eliáš, S. Hluchý, J. Mlynek

Czech J. Anim. Sci., 2007, 52(1):12-20 | DOI: 10.17221/2328-CJAS  

The aim of this study was to investigate the histological structure of the longissimus muscle in pigs in relation to carcass value indicators. A total number of 16 pigs of about 101.28 kg average live weight were used. The animals were raised at a Fattening and Carcass Value Experimental Station (FCVES) of Slovak University of Agriculture in Nitra in equal conditions, receiving a standard diet fortified with vitamin-mineral mixture, and they were slaughtered in an experimental abattoir of FCVES. Samples from the musculus longissimus lumborum et thoracisi (MLLT) for histological evaluation were taken within 30 minutes post mortem, immediately frozen...

Effects of oocyte collection techniques and maturation media on in vitro maturation and subsequent embryo development in Boer goat

Z.G. Wang, Z.R. XU, S.D. YU

Czech J. Anim. Sci., 2007, 52(1):21-25 | DOI: 10.17221/2327-CJAS  

The oocytes (experiment 1) were harvested by one of the four collection techniques (slicing, puncture, aspiration I and aspiration II) and the total number and the number of each grade of oocytes were counted, respectively. The good-quality oocytes (good and fair grade) were cultured for maturation. In experiment 2, the oocytes were matured in TCM-199 supplemented with 10 ng/ml of epidermal growth factor (EGF) or 10% FCS, either alone or with 1 IU/ml FSH, or the oocytes were matured in TCM-199 supplemented with 1 IU/ml FSH. After maturation, the oocytes in the two experiments were fertilized, respectively. Slicing (6.3) and puncture (5.8) of the ovaries...

The effect of oviposition time and genotype on egg quality characteristics in egg type hens

E. Tůmová, L. Zita, M. Hubený, M. Skřivan, Z. Ledvinka

Czech J. Anim. Sci., 2007, 52(1):26-30 | DOI: 10.17221/2326-CJAS  

In an experiment with three strains of Dominant genotype the effect of oviposition on egg quality characteristics was investigated. Laying hens of the Blue strain (group 1), Plymouth Rock (group 2) and their F1 cross (group 3) from 20 to 64 weeks of age were housed on litter (9 birds per m2). The collection time was at 6.00, 10.00 and 14.00 h. Eggs were gathered in a 28-day interval, every two days all produced eggs (720 eggs in total). The time of oviposition was influenced by genotype. The highest number of eggs was collected in the Plymouth Rock strain at 6.00 (53.5%) and the lowest in the Blue strain at 14.00 (11.1%). There were interactions between...