To investigate the genetic and environmental effects on the economically important traits in swine, data on 4.782 pigs tested from 1990 through 1993 at a test station were analysed. The statistical model applied for the analysis was consisted of sex, ...
To investigate the genetic and environmental effects on the economically important traits in swine, data on 4.782 pigs tested from 1990 through 1993 at a test station were analysed. The statistical model applied for the analysis was consisted of sex, breed, purity, year and season of birth as main effects with the interaction of the year×season. Males bowed greater duly gain by about 50g, thiner backfat, and reached 90㎏ body weight earlier than females. By computing with the game index, the males showed greater values than females. Duroc showed faster growth, and thicker backfot, while Yorkshire was superior in feed conversion to the other two breeds. The backfat thickness was smaller in the pigs of 2nd parity, but the clays to reach 90㎏ body weight tends to be shorter in the pigs of 3rd parity. The pig bom in toll or winter grew faster than those born in spring or summer season. The year effect on most of the traits showed gradual progress representing the results of the selection and/or replacement effects by the parent stock imported from many foreign countries over a long, period.