Table 1.
Gene characteristics of the H. atra mitochondrial genome.
Table 2.
Mitochondrial gene nucleotide composition and base bias.
Fig 1.
H. atra mitogenome gene map.
Fig 2.
The secondary structure of H. atra mitochondrial tRNA.
Fig 3.
Amino acid composition of mitochondrial gene of H. atra.
Fig 4.
RSCU of H. atra mitochondrial PCGs.
Table 3.
The genetic diversity indices of partial 16S rRNA and COⅠ of H. atra.
Fig 5.
Maximum likelihood phylogenetic tree for the complete mtDNA sequence of Holothuroidea.
The position of H. atra in the tree is marked by a red circle.
Fig 6.
Mitochondrial gene rearrangements of 19 species in Holothuroidea.
There are regions with gene rearrangement. Short straight lines indicate a gene rearrangement, while long straight lines represent the overall positional changes of multiple genes within the linearly marked area;
The position undergoes changes before and after;
The position has undergone a reversed change in its existence; The meanings of different colors in the figure: green: protein-coding genes, violet: rRNA, blue: tRNA.