CHINESE JOURNAL OF PARASITOLOGY AND PARASITIC DISEASES ›› 2024, Vol. 42 ›› Issue (3): 389-398.doi: 10.12140/j.issn.1000-7423.2024.03.016

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Research advances on Pulicinae mitochondrial genomes

LIN Xiaoxia(), DONG Wenge*()   

  1. Institute of Pathogen and Vector, Yunnan Provincial Key Laboratory of Zoonosis Control and Prevention, Dali University 671000, Yunnan, China
  • Received:2024-01-29 Revised:2024-05-14 Online:2024-06-30 Published:2024-07-16
  • Supported by:
    National Natural Science Foundation of China(32260152)

Abstract:

Pulicinae belongs to Siphonaptera, Pulicoidea, Pulicidae, are common haematophagous ectoparasites in rodents, cats and dogs. A total of 3 genera and 5 species (Ctenocephalides felis, C. canis, C. orientis, Xenopsylla cheopis and Pulex irritans) have been determined. The structural characteristics and polymorphisms of the mitogenome have the following characteristics: the mitogenome retains the typical arrangement of the arthropod ancestor without gene deletions, additions, or rearrangements; higher AT content and both AT-skewness and GC-skewness were negative. The preferred codon usage is similar to most holometabolous insects. The tRNA-Ser (trnS1) gene of P. irritans shows a typical cloverleaf structure, and the other species have the same trnS1 but lacks the D-arm with the metazoan animals. The trnS1 of 5 species within the Pulicinae subfamily replaced the common GCU with UCU as the anticodon.The control region of the Pulicinae subfamily is relatively large with up to more than 7 kb in length and are mainly dinucleotide repeats. Similar to most holometabolous insects, there is a 7 bp conserved overlapping region between NADH dehydrogenase subunit 4 (nad4) and nad4L. This article aims to provide reference for the evolution of the flea subfamily in holometamorphosis insects in the future.

Key words: Pulicinae, Mitochondrial genome, Phylogenetic, Molecular evolution

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