Characterization of the complete mitochondrial genomes of Corynosoma bullosum (von Linstow, 1892) and C. evae Zdzitowiecki, 1984 (Acanthocephala: Polymorphida), and the phylogenetic implications.

IF 1.6 3区生物学 Q4 PARASITOLOGY

Journal of Helminthology Pub Date : 2025-02-10 DOI:10.1017/S0022149X2500001X

Y-Y Xie, H-X Chen, T A Kuzmina, O Lisitsyna, L Li

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引用次数: 0

Abstract

Species of the genus Corynosoma (Acanthocephala: Polymorphida) mainly parasitize marine mammals and rarely marine birds, and are of veterinary and medical importance due to causing corynosomiasis in wildlife and humans. However, the current knowledge of the mitochondrial genomes and mitogenomic phylogeny of this group remains very insufficient. In the present study, the complete mitochondrial genomes of C. bullosum (von Linstow, 1892) and C. evae Zdzitowiecki, 1984 were sequenced and annotated for the first time. Both mitogenomes comprise 12 protein-coding genes (missing atp8), 22 tRNA genes, and 2 ribosomal RNAs (rrnS and rrnL), plus 2 non-coding regions (NCR1 and NCR2). Corynosoma bullosum has the largest mitogenome (14,879 bp) of any polymorphid species reported so far, while C. evae has the smallest (13,947 bp), except for Sphaerirostris lanceoides (Petrochenko, 1949). Comparative mitogenomic analysis also revealed the presence of distinct discrepancies in A + T content and gene rearrangement across the families Polymorphidae, Centrorhynchidae, and Plagiorhynchidae. Moreover, phylogenetic analyses based on the concatenated amino acid sequences of 12 protein-coding genes strongly supported the monophyly of the order Polymorphida and a close affinity between the families Polymorphidae and Centrorhynchidae in Polymorphida. The present mitogenomic phylogeny provides additional evidence for a sister relationship between the genera Corynosoma and Bolbosoma and demonstrated that C. evae has a closer relationship with C. villosum than C. bullosum in the genus Corynosoma.

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Corynosoma bullosum （von Linstow, 1892）和C. evae Zdzitowiecki, 1984（棘头类：多形目）线粒体全基因组的鉴定及其系统发育意义。

锥虫属的一种（棘头目：多形目）主要寄生于海洋哺乳动物，很少寄生于海洋鸟类，由于在野生动物和人类中引起锥虫病，具有重要的兽医和医学意义。然而，目前对线粒体基因组和有丝分裂基因组系统发育的了解仍然非常不足。本研究首次对C. bullosum （von Linstow, 1892）和C. evae Zdzitowiecki（1984）的线粒体全基因组进行了测序和注释。两个有丝分裂基因组包括12个蛋白质编码基因（缺失atp8）， 22个tRNA基因，2个核糖体rna (rrnS和rrnL)，以及2个非编码区（NCR1和NCR2）。在迄今所报道的所有多形态物种中，球状圆锥虫（Corynosoma bullosum）的有丝分裂基因组最大（14,879 bp），而伊蚊（C. evae）的有丝分裂基因组最小（13,947 bp），除了梭鲈（Sphaerirostris lancoides）（Petrochenko, 1949）。有丝分裂基因组分析还显示，多形蝶科、尖吻蝶科和斜吻蝶科的A + T含量和基因重排存在明显差异。此外，基于12个蛋白质编码基因的氨基酸序列串联的系统发育分析有力地支持了多形目的单系性，以及多形科和多形科之间的密切亲缘关系。有丝分裂学系统发育为锥虫属和Bolbosoma之间的姐妹关系提供了额外的证据，并证明了C. evae与C. villosum的亲缘关系比C. bullosum在锥虫属中的亲缘关系更近。

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来源期刊

Journal of Helminthology 生物-动物学

CiteScore

2.80

自引率

12.50%

发文量

127

审稿时长

3 months

期刊介绍： Journal of Helminthology publishes original papers and review articles on all aspects of pure and applied helminthology, particularly those helminth parasites of environmental health, medical or veterinary importance. Research papers on helminths in wildlife hosts, including plant and insect parasites, are also published along with taxonomic papers contributing to the systematics of a group. The journal will be of interest to academics and researchers involved in the fields of human and veterinary parasitology, public health, microbiology, ecology and biochemistry.