Vliv rodiny na exteriér a dosažení tělesné dospělosti u plemene Shagya-arab

The aim of the bachelor thesis was to analyse data on the exterior and body dimensions of Shagya-Arab mares at registration in the studbook and subsequently to measure the actual body dimensions of a part of the mare population. The mares were separated by family and the effect of family on exterior, body size and maturity termination was evaluated. For the first part, 332 Czech-bred mares from 10 different families were used and 33 broodmares belonging to 4 families were included in the second part. The enrolment data were: age, final mark, withers stick height, withers strip height, shank circumfe-rence and chest circumference. Actual body measurements were wither stick height, wither tape height, shin circumference, and chest circumference. The results show that the population under study on average meets the breeding objective in all parameters evaluated. The best average score of 7.73 points was found for family 6-CZ. In this family, the highest average stick height (156 cm), the highest average tap height (164.5 cm), the highest average chest circumference (187.82 cm) and the highest average shin circumference (18.90 cm) were still measured. This fa-mily also has the most mares registered in the main studbook (51). According to the results it can be taught that the most powerful (largest) and the most typical mares are from the 6-CZ family. In the studied population of 4 families, a statistically highly significant effect of family was shown only for the age at which growth in height was stopped in mares (measured with a cane in the co-hutch). The result shows that other body dimensions were not statistically significantly influenced by family. From the results it can be concluded that the owner should adapt the age at which he starts working with the horses to the earliness of the individual family. The breeder should then pay attention to the exterior of the parental pair when selecting suitable individuals so that future generations of Shagya-arab horses still meet the breeding objective