Czech Journal of Animal Science, 2021 (vol. 66), issue 4
The role of molecular genetics in animal breeding: A minireviewReview
Jitka Kyselová, Ladislav Tichý, Kateřina Jochová
Czech J. Anim. Sci., 2021, 66(4):107-111 | DOI: 10.17221/251/2020-CJAS 
Current animal breeding approaches are strongly associated with the development of sophisticated molecular genetics methods and techniques. Worldwide expansion of genomic selection can be achieved by the identification of genetic DNA markers and implementation of the microarray ("chip") technology. Further advancement was associated with next-generation sequencing methods, high-throughput genotyping platforms, targeted genome editing techniques, and studies of epigenetic mechanisms. The remarkable development of "omics" technologies, such as genomics, epigenomics, transcriptomics, proteomics and metabolomics, has enabled individual genomic prediction...
Additive genetic and permanent environmental correlation between different parts of lactation in moderate and cold regionsOriginal Paper
Farzad Atrian Afiani, Sahereh Joezy-Shekalgorabi, Mehdi Amin-Afshar, Ali-Asghar Sadeghi, Just Jensen
Czech J. Anim. Sci., 2021, 66(4):112-121 | DOI: 10.17221/254/2020-CJAS
The objective of this study was to investigate genotype by environment interaction as well as genetic parameters for somatic cell score (SCS) in first lactation Holstein cows in Iran. Data were collected by the National Animal Breeding Centre of Iran during 2003 to 2018. Data consisted of 1 031 885 SCS test-day records of 145 817 first lactation Holstein cows. Records were classified into the cold and moderate climate on data of synoptic stations. Variance components and genetic parameters were estimated using a random regression model and restricted maximum likelihood method. The analyses were performed using the AI-REML algorithm of the DMU package....
The effect of inbreeding on the growth ability of meat sheep breeds in the Czech RepublicOriginal Paper
Michaela Černá, Michal Milerski, Michala Mušková
Czech J. Anim. Sci., 2021, 66(4):122-128 | DOI: 10.17221/193/2020-CJAS
The aim of this study was to present the trend of inbreeding and to estimate the effect of inbreeding on the growth ability of lambs in the three most common sire breeds in the Czech Republic: Suffolk (SF; n = 49 345), Charollais (CH; n = 14 189) and Texel (T; n = 10 481). The growth ability of lambs was evaluated between 2000 and 2019 based on the weight at 100 days of age. The average inbreeding coefficient for Suffolk, Charollais and Texel was 0.013, 0.012 and 0.011, respectively. The average number of known generations was 5.260 for Suffolk, 3.355 for Charollais and 3.709 for Texel. To evaluate growth...
Changes of macromineral and trace element concentration in the blood of ewes during lactation periodOriginal Paper
Zvonko Antunović, Boro Mioč, Zdenko Lončarić, Željka Klir Šalavardić, Ivan Širić, Valentino Držaić, Josip Novoselec
Czech J. Anim. Sci., 2021, 66(4):129-136 | DOI: 10.17221/250/2020-CJAS
The aim of the present research was to determine the changes in macromineral and trace element concentrations in ewes' blood during the lactation period. Thirty-six Travnik pramenka ewes at the average age of 3-5 years were included in research and they were evaluated at three stages of lactation: early stage (40 ± 5 days of lactation), medium stage (80 ± 5 days of lactation) and late stage (120 ± 5 days of lactation). In ewes' blood concentrations of macroelements (Ca, P, K, Na, Mg) and trace elements (Fe, Cu, Zn, Mo, Co, Se, Cd, As) were determined. The average concentrations of macroelements and trace elements...