USAGE OF INDEX SELECTION IN THE EVALUATION OF LARGE WHITE BREED SOWS

Abstract

The research was carried out on the basis of the farm of LLC "Russia" Mozhginsky district of the Udmurt Republic. The object of research was sows of the main herd of Large White breed in the amount of 100 heads. The age of the sows was 24 months under two farrows in the year. The aim of the research was evaluation of the  reproductive qualities of the sows of the main herd in the context of families, by calculating a complex indicator of the reproductive qualities. The index evaluation of the reproductive qualities was carried out to take into account such indicators as: the prolificacy, the milkness, the number of piglets in 2 months and the masse of the nest in 2 months. The obtained experimental data were processed in a tabular redactor program Microsoft Excel - 2010. The evaluation of the reproductive ability of the sows in the main herd in the context of families showed that the sows of the families Beatrisa, Ovatsia and the Volshebnitsa differed from the sows of the families Skazka, Soya and the Palitra more higher prolificacy- by 0.36-1.44 heads, a mass of the nest in 2 months - by 2, 58-22.46 kg and the number of piglets in 2 months - by 0.35-0.78 heads. The complex indicator of the reproductive qualities of the sows of the families Beatrisa, Ovatsia and the Volshebnitsa, exceeded the complex indicator of the reproductive qualities of the families Skazka, Soya and the Palitra by 3.52-12.82 points.  The evaluation of the reproductive qualities of the sows of the families Beatrisa, Ovatsia and the Volshebnitsa showed that they exceeded the average level on the herd on the prolificacy- by 3.04 heads, the mass of the nest under weaning piglets in 2 months of age - by 9.03-28.72 kg, the number of the piglets under weaning in 2 months of age - by 0.62-1.64 heads, and on the complex indicator of reproductive qualities - by 8.90-19.39 points. The results of the research made it possible to select the best sows for the breeding stock and use them widely in the reproduction of the herd.