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Ledvinka Z.,Czech University of Life Sciences | Tumova E.,Czech University of Life Sciences | Englmaierova M.,Institute of Animal Science Prague Uhrineves | Podsednicek M.,Ministry of Agriculture of the Czech Republic
Archiv fur Geflugelkunde | Year: 2012

The effects of housing system (conventional cages, litter), genotype (ISA Brown, Hisex Brown and Moravia BSL) and age on egg quality parameters were evaluated. Eggs were sampled three times in the laying period at the age 20 to 24 weeks, 38 to 42 weeks and 56 to 60 weeks. One hundred twenty eggs from each strain, housing system and laying period were collected for egg quality assessment (total 2150 eggs). For egg weight, significant interaction of housing and genotype (P ≤ 0.017) and genotype and age (P ≤ 0.001) were determined. Yolk weight was more affected by hen's age than albumen weight. The effect of housing system on albumen quality was significant (P ≤ 0.001) with lower values for eggs from the litter system. Significant three-way interactions were found for egg shell surface (P ≤ 0.037) and albumen weight (P ≤ 0.050). © Verlag Eugen Ulmer, Stuttgart.

Tumova E.,Czech University of Life Sciences | Bizkova Z.,Czech University of Life Sciences | Skrivanova V.,Institute of Animal Science Prague Uhrineves | Chodova D.,Czech University of Life Sciences | And 2 more authors.
Livestock Science | Year: 2014

The aim of the present study was to evaluate the differences in carcass composition, meat quality characteristics, and muscle fibre characteristics among rabbits of different sizes and of different breeds. The present study was performed using 96 rabbits (12 rabbits per group) at the age of 90 days, including seven pure breeds and one commercial hybrid. The included rabbit breeds were as follows: the giant breed Moravian Blue (MB); the medium breeds Czech White (CW), Czech Spotted (CS), Czech Solver (CSo), and Moravian White of Brown Eye (MW); the small breeds Czech Black Guard Hair (CB) and Czech Gold (CG); and the hybrid Hyplus rabbits (PS 19×PS 39). The slaughter weights were significantly (P<0.001) affected by the breed. Comparisons of the dressing out percentage showed significant differences (P<0.001) among groups, and the lowest dressing out percentage was observed in the small breed CB (56.7%). The lowest values for the hind part percentage, hind leg percentage and hind leg meat percentage were in the medium breed CS (50.1%, 28.2% and 21.6% respectively). The results of the loin chemical composition assay revealed differences among the groups in crude protein (P<0.001), fat (P<0.001) and cholesterol (P<0.05) contents and in the hind leg meat differences in crude protein (P<0.001) and fat contents (P<0.05). The highest (P<0.05) loin cholesterol contents (53.4. mg/100. g), hind leg fat (3.59%) values were observed in the medium breed CS, which corresponded with the highest perirenal fat content (2.98%). For both types of muscle fibres (βR and αW), the smallest (P<0.001) cross-sectional areas, diameters and perimeters were found in Hyplus rabbits. Good results of CW rabbits in carcass composition show that this breed might be used for commercial production. © 2014 Elsevier B.V.

Chodova D.,Czech University of Life Sciences | Tumova E.,Czech University of Life Sciences | Volek Z.,Institute of Animal Science Prague Uhrineves | Skrivanova V.,Institute of Animal Science Prague Uhrineves | Vlckova J.,Czech University of Life Sciences
Czech Journal of Animal Science | Year: 2016

The effect of one-week intensive feed restriction on the carcass characteristics, meat tenderness, cooking loss, and muscle fibre characteristics of growing rabbits was evaluated. Weaned rabbits (35 days) were divided into three groups: rabbits fed ad libitum (ADL), rabbits fed 50 g (R50), and rabbits fed 65 g (R65) of feed per animal per day in days 42-49 of age. Dressing out percentage was lower (-1.3% and -2.3% for R50 and R65, respectively) in restricted rabbits (P ≤ 0.001) but increased with age (P ≤ 0.001). Cooking loss significantly increased in restricted rabbits. A significant interaction between feeding regime and age was observed in the number of type αR muscle fibres, the highest number (P ≤ 0.05) was observed in the ADL rabbits (114.5) at 49 days, and the lowest was found in the R50 group at 70 days of age (25.0). Feed restriction increased the percentage of αW glycolytic fibres (P ≤ 0.01). A significant negative correlation was found between cooking loss and the cross sectional area of αW fibres (-0.486) and αR (-0.325). It could be concluded that one-week intensive feed restriction did not have a negative effect on meat tenderness and cooking loss, despite the fact that it affected muscle fibre type distribution.

Tumova E.,Czech University of Life Sciences | Chodova D.,Czech University of Life Sciences | Uhlirova L.,Czech University of Life Sciences | Vlckova J.,Czech University of Life Sciences | And 2 more authors.
Czech Journal of Animal Science | Year: 2016

The study determined the muscle fibre characteristics and sensory properties of the longissimus lumborum muscle (LL) of eight-month-old nutrias of three colour types and the correlations between meat histochemical measurements and eating quality. The following nutria colour types were used in the experiment: Standard (ST), Moravian Silver (MS), and Prestice Multicolour (PM). The nutria colour type significantly (P < 0.001) affected the number of type IIB fibres with the lowest number in ST (108 per mm2). The proportion of type I fibres varied between 10.6 and 14.2%; type IIA fibres varied between 6.1 and 7.8%; and type IIB fibres varied between 78.2 and 83.4% and it was not affected by colour type. The cross-sectional area (CSA) was 2.565-2.841 μm2 in type I, 2.867-3.010 μm2 in type IIA, and 4.698-5.517 μm2 in type IIB fibres. The CSA of type IIB fibres (P < 0.001) was the largest in ST. The sensory trait of tenderness (P < 0.05) was the lowest in MS. Correlations between the proportion of fibres and sensory traits were not observed. The CSA of type I fibres correlated with flavour (0.19) and the CSA of type IIB fibres with tenderness (0.10).

Jecminkova K.,Czech University of Life Sciences | Jecminkova K.,Institute of Animal Science Prague Uhrineves | Kyselova J.,Institute of Animal Science Prague Uhrineves | Said Ahmed A.,Humboldt University of Berlin | And 3 more authors.
Scientia Agriculturae Bohemica | Year: 2016

To investigate the differences between the lineages of the Czech Fleckvieh cattle in Leptin promoter SNP C963T, 695 Czech Fleckvieh cows (650 from production herds and 45 from the Genetic Resources Program (GR)) were examined using PCR-RFLP. The C and T alleles of Leptin promoter were observed with a predominance of C allele in both groups. The most frequent genotypes were CC (63%) in production herds and CT (48%) in the GR population. The present study describes, for the first time, the genetic differences in production herds and GR population in Leptin promoter C963T SNP. Variation within the Czech Fleckvieh population was observed and resulted in an advantage to the GR population. Results presented herein emphasized the importance of the GR program as a reservoir of genetic diversity for indigenous breeds. © 2016 K. Jecminkova et al., published by De Gruyter Open.

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