Evaluations of the influence of some genetic and environmental factors on the productivity of pigs from the Danube White breed. II. Effect of the line, year and season on the productivity of pigs with similar genotype

Abstract

The effect of lines, years, seasons and the interaction among blood grading, year and season on the productive traits of 960 Danube White pigs were studied for three generations. The estimations of the factors studied were carried out by multifactor analyses. The interaction among blood grading, year and season was studied by a two-trait model. Significant influence of the line (P ≤ 0.05) and year (P ≤ 0.001) was established with respect to the traits studied (growth rate and lean meat percentage up to 90 kg live weight). The season influenced significantly the growth rate (P ≤ 0.001) only. The effect of the interaction among blood grading, year and season established favourable influence on the crosses compared to the other part of the population.