The significance of the effects influencing the reproductive performance in pigs
2012
Sprysl, M., Ceska Zemedelska Univ., Prague (Czech Republic) | Citek, J., Ceska Zemedelska Univ., Prague (Czech Republic) | Stupka, R., Ceska Zemedelska Univ., Prague (Czech Republic) | Brzobohaty, L., Ceska Zemedelska Univ., Prague (Czech Republic) | Okrouhla, M., Ceska Zemedelska Univ., Prague (Czech Republic) | Kluzakova, E., Ceska Zemedelska Univ., Prague (Czech Republic)
The aim of this study was to demonstrate the significance of year, season, parity and sire-line effects on the reproductive performance in the breeding herd of LWS sows. In total, 1,369 sows were monitored during 10 years. All purebred LWS sows were inseminated by LWS boars of various lines within the purebred breeding. The following reproduction traits were monitored for each sow: identity, boar-line, number of total, live born and reared piglets per sow/litter, number of stillbirths, dead piglets and percentage of piglets' losses, parity of sows and farrowing interval. Nutrition was carried out with respect to sows' reproduction cycle with the use of commercial complete feeding mixtures for nursing and gravid sows. The results (with regards to the individual monitored traits) were evaluated with the use of the ANOVA-program, and all statistical analyses were performed using the GLM procedure of SAS 9.1. Year, season, parity and line were set as fixed effects while their conclusiveness was evaluated with the help of the Tukey test. It can be stated that the monitored herd showed an above-average reproductive performance. Parity significantly influenced the total number of born piglets and also the number of dead piglets and their losses. Year and season did not significantly affect the reproductive performance in the herd studied.
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