Czech Journal of Animal Science, 2012 (vol. 57), issue 3
Evaluation of fattening and slaughter performance and determination of meat quality in Złotnicka Spotted pigs and their crosses with the Duroc breed
K. Szulc, E. Skrzypczak, J.T. Buczyński, D. Stanisławski, A. Jankowska-Mąkosa, D. Knecht
Czech J. Anim. Sci., 2012, 57(3):95-107 | DOI: 10.17221/5561-CJAS 
The study aimed at an evaluation of fattening and slaughter performance as well as meat quality of the native Złotnicka Spotted (ZS) pigs and its crosses with Duroc pigs. The experimental material comprised 60 fatteners, divided into three genetic groups of 20 animals (100% ZS, 75% ZS and 50% ZS). The specific character of conservative breeding results in low values of fattening and slaughter performance traits observed in ZS breed. Among the analysed groups, animals with 100% share of ZS genes in their genotype were characterised by low daily weight gains (0.59 kg), considerable backfat thickness (34.96 mm), slight muscle thickness (48.05 mm), and...
Genetic parameters for female fertility and milk production traits in first-parity Czech Holstein cows
V. Zink, J. Lassen, M. Štípková
Czech J. Anim. Sci., 2012, 57(3):108-114 | DOI: 10.17221/5562-CJAS
The aim of this study was to estimate genetic parameters for female fertility and production traits in first-parity Czech Holstein cows and to quantify the effect of using this information on the accuracy of a selection index in seven different scenarios. In order to estimate genetic (co)variance components, the DMU software running an AI-REML algorithm was used. The analyses were made using a series of bivariate animal models. The pedigree included 164 125 animals and it was set up using a pruned animal model design. The present study included the following female fertility traits for the first lactations: calving to the first insemination (CF), days...
Body conformation, carcass composition and physicochemical and sensory properties of meat from pheasants of different origin
D. Kokoszyński, Z. Bernacki, Ł. Duszyński
Czech J. Anim. Sci., 2012, 57(3):115-124 | DOI: 10.17221/5564-CJAS
Mongolian × Versicolor and common pheasants were investigated. Birds were kept in a confined, environmentally controlled facility without outdoor access and fed ad libitum commercial diets for slaughter pheasants. Body weight was determined at the end of 6, 10 and 13 weeks of rearing, and body weight and body measurements were determined in 16-week-old pheasants. At 16 weeks, 20 pheasants were taken from each genetic group for slaughter. After slaughter, pH15 of muscles was determined and carcasses were dissected. Samples of breast and leg muscles were collected to determine water holding capacity, colour, and sensory properties...
Genetic correlations between longevity and conformation traits in the Czech Holstein population
L. Zavadilová, M. Štípková
Czech J. Anim. Sci., 2012, 57(3):125-136 | DOI: 10.17221/5566-CJAS
Genetic correlations between longevity and conformation traits were estimated using data on Czech Holstein cows first calved in the years 1993-2008. Longevity traits considered were length of productive life and number of lactations initiated and their functional equivalents (i.e. the longevity traits corrected for milk production). Conformation traits were twenty one linear descriptive type traits, six composite traits and height at sacrum measured in cm. A possible nonlinear relationship between conformation and longevity traits was also investigated. The heritabilities ranged from 0.05 to 0.43 for conformation traits and from 0.03 to 0.05 for longevity...
Bacteriocin-producing lactic acid bacteria as a probiotic potential from Thai indigenous chickens
H. Musikasang, N. Sohsomboon, A. Tani, S. Maneerat
Czech J. Anim. Sci., 2012, 57(3):137-149 | DOI: 10.17221/5568-CJAS
Bacteriocin-producing lactic acid bacteria (LAB) were isolated and screened from the gastrointestinal tract (GIT) of Thai indigenous chickens. The bacteriocinogenic activities and the primary probiotic properties were determined. The bacteriocins produced by 14 strains of selected LAB displayed inhibitory activity against indicator strains after the supernatants were neutralized with NaOH in the following species: Lactobacillus sakei subsp. sakei JCM1157, Enterococcus faecalis VanB, Bacillus sp., and Listeria monocytogenes. The antagonistic acti-vity of selected LAB was inactivated or decreased...