Effect of heterospermic insemination of hybrid sows on the farrowing rate and the litter size
1999
Cerovsky, J. | Hudecek, V. | Rozkot, M. (Vyzkumny Ustav Zivocisne Vyroby, Kostelec nad Orlici (Czech Republic)) | Hercik, Z.
575 sows were inseminated by heterospermic insemination doses from 6 pairs of boars. Each sow was inseminated in oestrus and reinseminated with insemination doses from one of the 6 homology pairs of boars. The control group of sows was inseminated by so called non-genuine heterospermy. We did not find a significant difference in the farrowing rate after the first insemination between the individual groups of boars but there is a significant difference between the experimental and control group of sows (66.51 % vers. 60.54 %). We found out a non-significant difference in the farrowing rate between the experimental and control group of sows after the second and other inseminations (58.27 % vers. 51.89; chi**2 = 1.91). The number of liveborn piglets per litter after the first insemination at the comparable parity of the experimental and control group of sows (4.80+/-2.41 vers. 4.75 +/- 2.39 litters; t = 0.768) achieved higher values after all experimental groups of boars than is the average value in the control group of sows. The piglet production per 100 first inseminations was higher in the experimental group of farrowed sows than in the control group (+105.8 of total and +99.2 of liveborn piglets). The situation was the same with the farrowed sows after the second and other inseminations performed by the heterospermic doses in favour of the experimental group (+94.9 of total and +90.9 of liveborn piglets).
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