Complete mitochondrial genome of Idea leuconoe (Lepidoptera: Danaidae) and related phylogenetic analyses
2022
Wang, Jing | Xin, Tianrong | Li, Zhenzhen | Zhang, Xiaojing | Zou, Zhiwen | Xia, Bin
In the present study, we first sequenced and determined the complete mitochondrial genome (mitogenome) of the giant Danaidae butterfly, Idea leuconoe (Lepidoptera: Danaidae). The mitogenome was a typical closed, circular, double‐stranded DNA molecule of 15,278 bp length (GenBank accession number: KR815449), similar to the metazoan mitogenomes containing 37 genes and one A + T‐rich region. All the protein‐coding genes (PCGs) were initiated with a typical ATN codon. Seven genes (COII, ATP6, COIII, nad4, nad4L, cytb, and nad1) adopted the standard ATG start codon, but the remaining six genes were initiated with ATA. All the 13 PCGs harbored complete termination codons (TAA). The overlap nucleotides ATGATAA were conserved for the ATP8/ATP6 gene. The largest intergenic spacer was located between trnGln and nad2, a common finding in Lepidoptera butterflies. All the transfer RNA genes in the I. leuconoe mitogenome could be folded into typical clover‐leaf secondary structures, except for trnSer (AGN) that lacked a dihydrouridine arm. The control region with 94.8% A + T content was 444 bp in length and located between rrnS and trnMet. Finally, the phylogenetic relationships obtained using the maximum likelihood and Bayesian methods confirmed two well‐supported phylogenetic trees of Danaidae, Papilionidae, and Nymphalidae from the order Lepidoptera, which were consistent with the traditional morphological classification. Results provided additional information for butterfly phylogenetic analysis and insights into the evolution of genomes.
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