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Vztah bezrohosti k mléčné užitkovosti u plemene český strakatý skot
 Buřvalová, Michaela
This thesis studies the influence of polledness on parameters of milk production of Czech Fleckvieh cattle population. In theoretical section it gives an overview of current findings in the areas of anatomy, ontogenesis and genetics of polled and hor-ned phenotype, milk production and Czech fleckvieh breed. Then in practical section of this thesis, an evaluation of the phenotype (horned/polled and phenotypic deviations associated with polledness). Furthermore, the methodology of laboratory detection of mutations causing hornlessness (PCR + ELFO and Sanger sequencing) was optimized and carried out. This combination of polledness testing methods has proven to be effective so a relatively simple and cheap test to detect polledness in the Fleckvieh breed was designed. This test is suitable for further testing on a larger group of anima-ls. Second part of the practical section is devoted to statistical analysis (one-factor ANOVA and GLM) of dependency of milk production parameters (milk yield [kg of milk] fat content [%], protein content [%]) on polled genotype. Results of these analy-ses show, that polledness probably does not have a direct negative effect on milk yield and fat content in milk. However, the negative influence of polledness could not be refuted for the protein content parameter.
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