Figure 5From: Sexual and postmating reproductive isolation between allopatric Drosophila montana populations suggest speciation potentialProgeny 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.Back to article page