Resolution:
## Figure 3.
Molecular evolution models. Strategy used to test for accelerated rates of evolution along branches leading
to male-baised aphid slimfast paralogs. Tree topology is identical to the phylogeny in Figure 1. Each branch was
assigned a ω category as indicated. The models tested are outlined below the phylogeny.
The null model (one ratio) assumed equal ω across all branches. The first alternative
model (two ratios) assumed one ω ratio for branches outside the aphid-specific slimfast expansion and a different ω ratio for branches within the expansion. The second alternative
model (three ratios) assumed an additional, collective ω ratio for the branches leading
to the three male-biased paralogs, and third alternative model (five ratios) assumed
a distinct ω for each branch leading to a male-biased paralog or clade.
Duncan |