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The complete mitochondrial genome of Glyphocrangon regalis (Caridea, Glyphocrangonidae) and the phylogenetic relationships of Caridea

In: Crustaceana
Authors:
Jian Chen Marine Science and Technology College, National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang Province, China

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https://orcid.org/0009-0001-3061-5896
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Yuman Sun Marine Science and Technology College, National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang Province, China
Jiangsu Coastal Area Institute of Agricultural Sciences, Yancheng, Jiangsu Province, China

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https://orcid.org/0000-0001-7203-9447
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Jiji Li Marine Science and Technology College, National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang Province, China

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https://orcid.org/0000-0002-8095-1492
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Kaida Xu Key Laboratory of Sustainable Utilization of Technology Research for Fisheries Resources of Zhejiang Province, Scientific Observing and Experimental Station of Fishery Resources for Key Fishing Grounds, Ministry of Agriculture and Rural Affairs of China, Zhejiang Marine Fisheries Research Institute, Zhoushan 316021, China

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https://orcid.org/0009-0006-5062-1544
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Yingying Ye Marine Science and Technology College, National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang Province, China

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https://orcid.org/0000-0003-0056-030X
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Abstract

In studying the mitochondrial genome (mitogenome) composition and gene sequences of deep-sea organisms, it is of great importance to understand and explore the molecular mechanisms underlying their adaptation to the deep-sea environment. Glyphocrangon regalis belongs to Caridea, Crangonoidea, and is a typical deep-sea shrimp. In this study, the complete mitogenome of G. regalis was obtained using next-generation sequencing technology. The mitochondrial genes were annotated, and their sequence structures were analysed. The complete mitogenome sequence of G. regalis was 15 918 bp in length, with a base composition of A (36.85%), T (36.68%), C (15.53%) and G (9.94%), exhibiting a significant AT bias with an A + T content of 75.53%. G. regalis encoded a total of 37 genes, including 13 protein-coding genes (PCGs), 22 tRNAs and 2 rRNAs; among them, 14 genes were located on the negative strand, and 23 genes were located on the positive strand, similar to other caridean shrimp mitogenomes. Additionally, a phylogenetic tree was constructed based on the 13 PCGs of the mitogenomes of 95 species from 12 families within Caridea, supporting the monophyly of various families within Caridea and revealing that G. regalis and species of Pandalidae were the most closely related. This study provides insights into the complete mitogenome of G. regalis, elucidating its genomic characteristics and structural functions. It clarifies the evolutionary status of G. regalis and explores the evolutionary patterns of various families within Caridea through phylogenetic tree construction, thereby providing more references for the study of Caridea systematics.

Résumé

Lorsqu’on étudie la composition du génome mitochondrial (mitogénome) et les séquences de gènes des organismes d’eaux profondes, il est important de comprendre et d’explorer les mécanismes moléculaires qui sous-tendent leur adaptation à l’environnement profond. Glyphocrangon regalis est une crevette profonde typique qui appartient aux Caridea Crangonoidea. Dans cette étude, le mitogénome complet de G. regalis a été obtenu en utilisant la technologie de séquençage de nouvelle génération. Les gènes mitochondriaux ont été annotés, et leurs structures de séquence ont été analysées. La séquence complète du mitogénome de G. regalis avait une longueur de 15,918 bp, avec une composition de base de A (36,85%), T (36,68%), C (15,53%) et G (9,94%), présentant un biais AT significatif avec un contenu A+T de 75,53%. G. regalis codait un total de 37 gènes, incluant 13 gènes codant pour des protéines (PCGs), 22 tRNAs et 2 rRNAs ; parmi eux, 14 gènes étaient situés sur le brin négatif, et 23 sur le brin positif, de façon analogue à d’autres mitogénomes de crevettes Caridea. De plus, un arbre phylogénétique a pu être construit sur la base des 13 PCGs des mitogénomes de 95 espèces appartenant à 12 familles de Caridea, soutenant la monophylie de diverses familles de Caridea et révélant que G. regalis et les espèces de Pandalidae étaient les plus proches apparentées. Cette étude fournit de nouvelles connaissances sur le mitogénome complet de G. regalis, en élucidant ses caractéristiques génomiques et ses fonctions structurelles. Elle clarifie le statut évolutif de G. regalis et explore les schémas évolutifs de diverses familles au sein des Caridea par la construction d’un arbre phylogénétique, apportant ainsi des références supplémentaires pour l’étude de la systématique des Caridea.

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