| The quantitative genetic parameters of sexual dimorphism for 10‐week body weight and its genetic correlation with egg weight and egg number was determined in an unselected population of White Leghorns. The genetic correlation between male and female weights was 0.586 indicating considerable genotype‐sex interaction. The heritability of the difference in weight between males and females was 0.267. The genetic correlations of the difference in weight between sexes with body weights of males and females were 0.690 and 0.06 respectively. There was evidence of a fairly high positive genetic correlation between egg weight and sexual dimorphism. Egg number to 44 weeks of age and sexual dimorphism were positively correlated but the magnitude of the correlation coefficient was small. |
