The first complete mitochondrial genome sequences for Ulidiidae and phylogenetic analysis of Diptera

DOI: https://doi.org/10.21203/rs.3.rs-1406595/v1

Abstract

Background: Tetanops sintenisi is a pest that mainly damages the roots of quinoa ( Chenopodium quinoa ) and it is first discovered in China in 2018.

Methods and Results: Here, the complete mitochondrial genome (mitogenome) of T. sintenisi was sequenced and compared with the mitogenomes of other Diptera species. The results revealed that the mitogenome of T. sintenisi is 15763 bp in length (GenBank accession number: MT795181) and is comprised of 13 protein-coding genes (PCGs), 22 transfer RNA (tRNA) genes, 2 ribosomal RNA genes, and a non-coding A+T-rich region (959 bp). The highly conserved gene arrangement of the mitogenome of T. sintenisi was identical to that of other Diptera insects. Twelve PCGs contained the typical insect start codon ATN, while cox1 had CGA as the start codon. The genes cox2 , nad4 , and nad1 contained an incomplete termination codon T; nad3 , nad5 , and cob contained the complete termination codon TAG; and the remaining seven PCGs contained the termination codon TAA. All tRNA genes were predicted to fold into the typical cloverleaf secondary structure. Phylogenetic analysis of 48 species based on the mitogenome sequence revealed that T. sintenisi clustered with the Tephritidae family, indicating that T. sintenisi and Tephritidae have a close phylogenetic relationship.

Conclusions: The phylogenetic relationship of T. sintenisi based on the mitogenome was consistent with the traditional morphological taxonomy, according to which T. sintenisi belongs to the family Otitidae, which is closely related to the family Muscidae.

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