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Complete Mitochondrial Genome of Two Ectoparasitic Capsalids (Platyhelminthes: Monogenea: Monopisthocotylea): Gene Content, Composition, and Rearrangement

文献类型: 外文期刊

作者: Yang, Changping 1 ; Shan, Binbin 1 ; Liu, Yan 1 ; Wang, Liangming 1 ; Wu, Qiaer 1 ; Luo, Zhengli 1 ; Sun, Dianrong 1 ;

作者机构: 1.Chinese Acad Fisheries Sci, South China Sea Fisheries Res Inst, Key Lab Marine Ranching, Minist Agr & Rural Affairs, Guangzhou 510300, Peoples R China

2.South China Normal Univ, Sch Life Sci, Guangdong Prov Key Lab Hlth & Safe Aquaculture, Guangzhou 510631, Peoples R China

3.Zhejiang Ocean Univ, Sch Fisheries, Zhoushan 316022, Peoples R China

关键词: mitochondrial genome; Capsalidae; monogenean; gene rearrangement; phylogenetic analysis

期刊名称:GENES ( 影响因子:4.141; 五年影响因子:4.474 )

ISSN:

年卷期: 2022 年 13 卷 8 期

页码:

收录情况: SCI

摘要: The capsalid monogeneans are important pathogens that generally infect marine fishes and have a substantial impact on fish welfare in aquaculture systems worldwide. However, the current mitogenome information on capsalids has received little attention, limiting the understanding of their evolution and phylogenetic relationships with other monogeneans. This paper reports the complete mitochondrial genomes of Capsala katsuwoni and Capsala martinieri for the first time, which we obtained using a next-generation sequencing method. The mitogenomes of C. katsuwoni and C. martinieri are 13,265 and 13,984 bp in length, respectively. Both species contain the typical 12 protein-coding genes, 2 ribosomal RNA genes, 22 transfer RNA genes, and a control region. The genome compositions show a moderate A+T bias (66.5% and 63.9% for C. katsuwoni and C. martinieri, respectively) and exhibit a negative AT skew but a positive GC skew in both species. One gene block rearrangement was found in C. katsuwoni in comparison with other capsalid species. Instead of being basal to the Gyrodactylidea and Dactylogyridea or being clustered with Dactylogyridea, all species of Capsalidea are grouped into a monophyletic clade. Our results clarify the gene rearrangement process and evolutionary status of Capsalidae and lay a foundation for further phylogenetic studies of monogeneans.

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