Figure 5 Neighbor-joining phylogenetic tree of odorant receptors (ORs)

The NJ phylogenetic analysis of ORs of E. hippophaecolus (EhipOR, red) was performed with reference ORs of D. melanogaster (DmelOR, Diptera, blue) and ORs of Lepidoptera species (black). The red circles refer to Orco and PR lineage. The stability of the nodes was assessed by bootstrap analysis with 1,000 replications, and only bootstrap values ≥0.6 are shown at the corresponding nodes. The scale bar represents 0.5 substitutions per site.