Estimates of repeatability for reproductive traits in Large White sows

The main aim of this paper was to analyze the effect of parity number on the litter size and other reproductive traits in Large White sows during successive farrowings to determine the repeatability estimates. The population used for the present study is from a pig farm managed by the Limited Liability Company (LLC) “Tavriys’ki svyni” located in Skadovsky district (Kherson region, Ukraine). The experimental materials used for this study consisted of 100 inds. of productive parent sows of the Large White breed. The estimation of reproductive performance was conducted for each animal included in this study. The total number of piglets born (TNB), number piglets born alive (NBA), number weaned piglets (NW), number of stillborn piglets (NSB) and frequency of stillborn piglets (FSB) per litter, number of piglets that died between birth and weaning (NPWM) and frequency of piglets that died between birth and weaning (FPWM) per litter were monitored in the first eight parities in the period of eleven years (2007–2017). For TNB, of the 28 correlations between different parities, 19 (i.e., 68 %) were statistically significant (P