Czech Journal of Animal Science, 2020 (vol. 65), issue 9
Monitoring and significance of the recessive genetic defect AH1 of Ayrshire cattleOriginal Paper
Marina Pozovnikova, Olga Tulinova, Anna Krutikova, Olga Mitrofanova, Nataliy Dementieva
Czech J. Anim. Sci., 2020, 65(9):323-329 | DOI: 10.17221/110/2020-CJAS 
Modern dairy farming is characterised by high selection intensity and the use of a limited number of bulls-producers. This increases the likelihood of widespread genetic defects in livestock populations. Genome-wide studies have identified DNA loci associated with the disruption of foetal embryonic development and its death, which have been called "fertility haplotypes". The aim of this study is to analyse the occurrence of АН1 haplotype or rs475678587 in Ayrshire bulls (n = 186) used in the artificial insemination system of Russia and to evaluate the reproductive and productive qualities of their daughters. The proportion of genetic...
Differences in growth and carcass composition of growing male and female turkeysOriginal Paper
Eva Tůmová, Robert Mervyn Gous, Darina Chodová, Mohamed Ketta
Czech J. Anim. Sci., 2020, 65(9):330-336 | DOI: 10.17221/180/2020-CJAS
An experiment was conducted with 1 680 one-day-old turkey poults (720 males and 960 females) of the Hybrid ConverterTM genotype to compare the growth performance of male and female turkeys. The experiment lasted until 119 days of age for males and 126 days for females, during which 6 commercial-type feeds were administered, with changes occurring at 21, 42, 63, 84 and 102 days of age. Performance was evaluated by weekly weighing and measuring feed consumption in each pen at weekly intervals. At 1, 7, 14, 21, 35, 56, 77, 119 (males) and 126 (female)...
Growth performance, mortality and body and carcass characteristics of rabbit fatteners related to crossbreeding of Mecklenburger Schecke sires with dam line of HYLA rabbitsOriginal Paper
David Zapletal, Petra Jakešová, Eliška Žáková, Vlastimil Šimek, Eva Straková
Czech J. Anim. Sci., 2020, 65(9):337-345 | DOI: 10.17221/192/2020-CJAS
The aim of the study was to evaluate the effect of crossing Mecklenburger Schecke (MS) males with the maternal commercial line of HYLA rabbits on the growth performance, mortality and body and carcass components of fattened rabbits under intensive farming conditions. The control (C) group consisted of albino crossbred rabbits of the HYLA combination AB sires × CD dams. The tested (T) group (MS sires × HYLA CD dams) consisted of rabbit crosses between the MS sires and the same dam line as in the C group. Rabbits of both groups were raised and fattened under identical nutritional and management conditions. The crossing of MS males with the maternal line...
Polymorphism and association of progesterone receptor gene with milk production and reproductive traits of rabbitsOriginal Paper
Ľubomír Ondruška, Vladimír Parkányi, Ján Rafay, Alica Navrátilová
Czech J. Anim. Sci., 2020, 65(9):346-353 | DOI: 10.17221/156/2020-CJAS
Using the PCR RFLP method polymorphism and three different genotypes (AA, AG and GG) were detected in the progesterone receptor gene (PGR) promoter in a local Slovak crossbred rabbit line. We have noted a slightly majority frequency of allele A (0.53) over allele G (0.47). Comparing the observed and expected genotype frequencies with the χ2 test the results were statistically significant, which means the tested rabbit population was non-equilibrium. The best results and significantly highest milk production (P < 0.001) were recorded in the does of GG genotype compared to AA genotype. Other association studies aimed...
Rainbow trout (Oncorhynchus mykiss) farmed at two different temperatures: Post rigor mortis changes in function of the stunning methodOriginal Paper
Antonella Dalle Zotte, Anna Concollato, Giulia Secci, Marco Cullere, Giuliana Parisi
Czech J. Anim. Sci., 2020, 65(9):354-364 | DOI: 10.17221/144/2020-CJAS
Post rigor mortis changes of texture, chemical and sensory properties in rainbow trout (Oncorhynchus mykiss) reared at two different temperature conditions (8 and 12 °C) were examined to better understand how different stunning methods, i.e. electroshock (E) and asphyxia with carbon monoxide (CO), can influence their evolution during refrigerated storage. Seven days after rigor resolution (TRR7), considering ATP catabolites (K- and K1-values), the freshness remained well preserved regardless of the stunning method applied and water temperature. During refrigerated storage fillets from fish reared at 8...