Figure 1.
Mitochondrial maps of six damsel bugs.
Direction of gene transcription is indicated by arrows. PCGs are shown as blue arrows, rRNAs as purple arrows, tRNAs as red arrows and large NC regions (>100 bp) as cyan rectangles. tRNAs are labeled according to single-letter IUPAC-IUB abbreviations (L1: UUR; L2:CUN; S1:AGN; S2:UCN). The GC content is plotted using a black sliding window, as the deviation from the average GC content of the entire sequence. GC-skew is plotted as the deviation from the average GC-skew of the entire sequence. Ticks in the inner cycle indicate the sequence length.
Figure 2.
Evaluation of codon bias across six nabid mtDNAs.
ENC, effective number of codons (out of a maximum of 61) [21]; CBI, codon bias index [22]; G+C, GC content of codons; (G+C)3, GC content of 3rd codon positions.
Figure 3.
Organization of the control region in six nabid mtDNAs.
The colorized panes indicate the structural elements in the CR. The alignment of the primary sequences and the predicated secondary stem-loop structures are shown, respectively, above and below.
Figure 4.
Molecular phylogenetic tree of six damsel bugs.
Phylogenetic analysis was based on all mitochondrial genes (excluding trnI, trnQ and trnM). The tree was rooted with two outgroup taxa (O. niger and L. lineolaris). Numbers close to the branching points are percentages of ML bootstrap support values (left) and Bayesian posterior probabilities (right).
Table 1.
List of the species included in the present study.