Figure 6.
Phylogenetic analysis of sesquiterpene biosynthesis gene clusters in 13 nucleotide sequences containing a total of 14,081 positions. Evolutionary relationship was inferred using the neighbour-joining method.38 An optimal tree with the sum of branch length = 0.10317173 is shown. The tree is drawn to scale with bootstrap values per 1,000 replicates shown at the branches.39 The evolutionary distances were computed using the Tamura–Nei method.40 The rate variation among sites was modelled with a γ distribution (shape parameter = 1). Evolutionary analysis was conducted as in MEGA7.17