Genetic and Environmental Effects on Live and Carcass Traits at the North Carolina Swine Evaluation Station

Publisher Website
Google Scholar
Abstract
Effects of breeds, farm/breeds, years, seasons, sexes and their two-way interactions were estimated from data collected at the N. C. Evaluation Station. Data were available on 1632 pigs from the period 1961 to 1967. Main effects were important for all traits except the influence of sex on feed efficiency and percent shoulder. Significant breed by season and breed by sex interactions were present for age at end of test, average daily gain and percent lean cuts. The time trends, estimated from the linear regression of year constants on time, indicated substantial improvement in all carcass traits except l. dorsi area. An increase of about 8% in percent lean cuts and a reduction of approximately 0.50 cm in backfat were estimated. There was essentially no change in age at end of test or average daily gain during the 7-year period while feed efficiency was slightly improved. Copyright © 1970. American Society of Animal Science . Copyright 1970 by American Society of Animal Science

This publication has 0 references indexed in Scilit: