Additional file 2: Figure S1. of Complete mitochondrial genomes of four entomopathogenic nematode species of the genus Steinernema

Principal component analysis of the codon usage in Steinernema mitochondrial genes. The first (PC1) and the second principal component (PC2) account for 98.1 % of the variability. Abbreviations: S.car, S. carpocapsae; Sgla, S. glaseri; Skus, S. kushidai; Slit, S. litorale; Bxyl, B. xylophilus; Pred, P. redivivus; Ptri, P. trichosuri. Figure S2. Phylogenetic relationships among Steinernema species inferred from nearly full-length nuclear 18S rRNA genes. A maximum-likelihood tree based on nucleotide sequences, with Panagrellus redivivus as the outgroup, was generated with the substitution model TVM+ G. Bootstrap values are given on the branches. The scale-bar represents the number of nucleotide substitutions per site. (PDF 28 kb)