In this study, the complete mitochondrial genome sequence of Bombyx mori strain Chunyun (Lepidoptera: Bombycidae) has been reported for the first time. The total length of the mitogenome was 15,659 bp with 37 typical animal mitochondrial genes and 1 non-coding A + T-rich region. Its gene content and order were identical to those of other lepidopteran mitochondrial genomes. All protein-coding genes (PCGs) were initiated by ATN codons except for the COI gene, which began with CGA codon. Eleven PCGs stopped with termination codon TAA, whereas the COI and COII genes ended with single T. All tRNAs have typical structures of insect mitochondrial tRNAs. The 494 bp AT-rich region contains several features common to other lepidopterans, such as some structures of repeated motifs and microsatellite-like elements and a poly-A element upstream of transfer RNA M (trnM) gene.
Keywords: Bombyx mori Chunyun; insect; mitogenome; silkworm.