Non-Additive Gene Effects of Six Broiler Traits as Studied from a Series of Diallel Matings ,

Genetic Variations in the Progenies of the Diallel Crosses of Inbred Lines of Chicken

“…Thus, there were 6 groups of top cross and 6 groups of incross birds. The diallel crossing system used in the experiments was different from the diallel mating system used by Lerner (1945), Hazel and Lamoreux (1947) and Kan, Krueger and Quisenberry (1959) in which individual males were rotated among a number of female groups.…”

Selection for Body Weight at Eight Weeks of Age

“…The median heritability was .41 with an interquartile range of .29 to .54. Martin et al (1953), Brunson et al (1956), Goodman et al (1957Goodman et al ( , 1960 and Kan et al (1959) found that nonadditive effects were small while Yao (1959Yao ( , 1961 reported significant dominance effects in certain incrosses and incrossbreds. Although the overall range of the estimates given in Figure 1 may appear wide it should be remembered that several methods of estimations were employed and that the parameters were obtained for many different populations.…”