Genetic and Breeding Progress Analysis on Five Pure Lines of Dahen Broiler

摘要

cqvip:To timely modify breeding scheme and improve selection efficiency of Dahen broiler,genetic and breeding progress analysis on five pure lines was conducted. The results showed that the selection on breeding goal traits of each line was effective since 14 generations,especially the selection on growth traits did not cause adverse influence on reproductive performance. After the 6 thgeneration,main performances of each line maintained in higher level,but the breeding progress obviously declined. It illustrated that current breeding means was effective for maintaining and consolidating breeding goal traits of Dahen broiler,and it should timely adjust breeding scheme to obtain more genetic progress.