Analýza faktorů ovlivňujících reprodukční užitkovost prasnic v podmínkách užitkového chovu

The aim of the diploma thesis was to analyse the factors affecting the reproductive performance of sows in the conditions of farming. Self-monitoring of awakening in selected pig breeding, data for evaluation was published in PIGMATIC. The period from 2016 to 2018 was selected for evaluation. Sows were Topigs genotype and boars of BO x PN genotype were embedded. In terms of the reproductive indicators there were evaluated successful insemination and the frequency of piglets, the number of all piglets born, the number of alive and stillborn piglets and the number of piglets weaned. It was evaluated according to the order of the reproduction indicator. Furthermore, an assessment was conducted in accordance with the parity and the specific causes of the elimination. It can be stated from the evaluation of the achieved results that the company has average reproductive performance and the litter order has a significant influence on the litter size. The best reproductive parameters were achieved in 2018, namely 14.7 of all births, 13.3 live births and 11.5 weaned piglets per litter. The stillborn piglets averaged 8.22% in 2016, 9.78% in 2017 and 9.39% of the litter in 2018. In 2016, the number of born piglets in the 4th litter, in 2017 in the 7th litter and in 2018 in the 5th in the year of litter increased in the number of all born piglets. In the case of older sows, the number of piglets born decreased. In evaluating the success of the insemination, it can be said that the best results were achieved in 2016, when 89.5% of the total number of admitted breeders took over. The worst results were achieved in 2017, when 86.2% of the total number of admitted sows were pregnant. Despite this, it means good sowing of sows mainly due to the successful search for rut and proper insemination techniques. The sows in the observed breed were better with young from the 8th litter. Furthermore, it was found that sows and gilts were the worst in the summer months. The highest number of sows was eliminated in 2016 after the first litter, in 2017 after the tenth litter and in 2018 after the eighth litter. The main cause of the decommissioning of breeding was poor health in 2016 and 2017, in 2018 it was old age. Due to old age, sows were eliminated in 2016 from the 8th litter, in 2017 from the 10th litter and in 2018 already from the 7th litter. Other reasons for decommissioning of sows were overrunning, limb defects, low yield, difficult births and abortion. Sows in breeding reach high litters, which indicates very good individual zootechnical care for individual sow