Figure 5.

Progeny production for isofemale lines. Mean progeny production per female in crosses involving flies from isofemale lines. Each cross type is represented by the letters O (Oulanka) and V (Vancouver), with the female parent listed first. Sample sizes are indicated inside the bars and different letters above error bars indicate significant differences between means based on Kruskal-Wallis tests. Error bars represent ± 1 SE.