Fig. 4
From: Inheritance of the duration of fertility in chickens and its correlation with laying performance
Relationship between DF traits and hatching egg production (HEP) during the collection period. Phenotypic (a, b) and genetic (c, d) relationships between number of eggs incubated and the five DF traits at 35 and 60 weeks of age, respectively. Differences in laying rate and hatchability between the highest (N = 1047) and lowest 50% of hens (N = 1047) selected from the EBV of HEP at 35 (e) and 60 weeks of age (f), respectively. Differences for the five DF traits at 35 (g) and 60 weeks of age (h), respectively, between the highest and lowest 50% of hens selected based on the EBV of HEP. For panels (g) and (h), the bar plots show the P values for the Wilcoxon rank-sum test between the two groups. The red dashed line shows the significance threshold (P = 0.05). The points located to the left and right of the bar indicates the mean value of the hens in the highest and lowest HEP EBV groups, respectively