Fig. 2
From: Inheritance of the duration of fertility in chickens and its correlation with laying performance
Genetic properties of the five DF traits. a Heritability for the five DF traits at 35 and 60Â weeks of age; and (b) Genetic relationships between the same variable measured at two ages. c Phenotypic relationships among the five DF traits at 35Â weeks (above the diagonal) and 60Â weeks (below the diagonal); d Genetic relationships among the five DF traits at 35Â weeks (above the diagonal) and 60Â weeks (below the diagonal). For panels (c) and (d), the background color represents the relationship among the five DF traits at the corresponding ages