Vyhodnocení vlivu rodičů na velikost plodu v době porodu

The diploma thesis entitled "Evaluation of the influence of parents on the size of a foetus at the time of birth" focuses on evaluating the maternal and paternal relationship to the size of a calf of the Friesian breed in the agricultural enterprise VOS Zemědělců, a.s. Velké Opatovice. The research part focused on measuring the dimensions of a mother (height at the withers, width of tubers costae, width of tubers sacrale, width of tubers ischiadicum), on the lactation order, date of insemination, date of calving and the course of birth. In calves, the dimensions of the width of the head, length of the head, birth weight and sex were observed. Year-long measurements were followed by statistical processing and evaluation of the data based on the results obtained from the measurements of individual cows, heifers and calves during birth. The diploma thesis analyses a database of the number of bulls and heifers for the reference period for which the birth weight and the course of birth were assessed. Furthermore, it assesses the influence of the lactation order of breeding cows on the size of offspring. The breeding cows were divided by the lactation order which is in accordance with their age. Another indicator monitored was the duration of gravidity and its relation to the size of the calf. The breeding cows were divided into 3 groups with various duration of gravidity. Twelve bulls with 312 offspring were included in a more detailed analysis. The relationship of a breeding bull in relation to the duration of gravidity, the size of offspring and the course of birth was assessed. The evaluated results are given at the end of this thesis