Analýza plodnosti prasnic ve vybraném chovu

The goal of the thesis was to analyze reproductive performance of sows in a selected breeding facility during a three-year period. 602 litters of the breed Czech Large White pig (CLW), 7 632 litters of the Czech Large White the Czech Landrace pig (CL) and 397 litters of the Czech Landrace Czech Large White were included in my observation. The average number of born piglets 15.43 was reached in the basic set of sows, out of which there were 14.25 live-born piglets. The highest number of all born piglets was found in CL CLW (16.25 pcs), followed by CLW (16.03 pcs) and CLW CL (15.34 pcs). The highest number of live-born piglets was found in CLW (14.51 pcs), then with a slight gap followed CL CLW (14.36 pcs) and the lowest number was found in CLW CL (14.22 pcs). The average age at first conception of sows was 235.7 days. Sows, younger than 229 days at first conception gave birth to 0.39 piglets more than sows of the age 230-250 days at first conception (13.42 or 13.03 piglets). The average gestation length was 115.7 days. More piglets were born to sows with gestation length shorter than 115 days, than to sows with gestation length 115 days and more (14.55 or 14.18). The difference of 0.37 piglets was statistically confirmed as highly relevant. The average length of weaning-to-conception interval was 5 days (4.97). More piglets (by 0.44) were born to sows that were serviced within 4 days after weaning, than to sows serviced within 5 and more days (15.03 or 14.58). The difference was confirmed as statistically highly relevant. The average length of farrowing interval was found 152.9 days. Sows were categorized into three groups based on this interval, 132145 days, 146-160 days and 161200 days. Most piglets were born to sows with farrowing interval 146160 days (14.58) and least to sows with farrowing interval 161200 days (14.51)