Abstract

The selection effects in litte r size (piglets born alive) and also in litter weight at 21 days of age in Czech Large White pigs were estimated on the basis of a comparison of a selected elite herd and of a control population which was represented by the average of recorded herds in the region of Central Bohemia during the 8 years' period. The expected values of genetic gains for both these traits were also predicted on the basis of the knowledge of the selection differential used and of the heritability coefficients estimated earlier. The average realized selection effect in litte r size calculated per one year was 0.14 piglet (87.5 % of the expected value of 0.16), and in litte r weight 0.43 kg (82.6 % of the expected value of 0.52 kg). In both cases a relatively good coincidence has been achieved with the expected values regarding that apart from selection for these traits also fattening performance and carcass value were considered.
 

R. Siler

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume X. Breeding programs for swine, poultry, and fish., , 187–192, 1986
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