首页|Frequent recombination in Cynoglossus abbreviatus(Pleuronec-tiformes:Cynoglossidae)ribosomal 18S rDNA

Frequent recombination in Cynoglossus abbreviatus(Pleuronec-tiformes:Cynoglossidae)ribosomal 18S rDNA

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The conventional theory of concerted evolution has been used to explain the lack of sequence variation in ribosomal RNA(rRNA)genes across diverse eukaryotic species.However,recent investigations into rRNA genes in flatfish genome have resulted in controversial findings.This study focuses on 18S rRNA genes of the widely distributed tongue sole,Cynoglossus abbreviatus(Pleuronectiformes:Cynoglossidae),aiming to explore sequence polymorphism.Five distinct 18S rDNA sequence types(Type A,B,R1,R2,and R3)were identified,suggesting a departure from concerted evolution.A combination of general criteria and variations in highly conserved regions were employed to detect pseudogenes.The results pinpointed Type A sequences as potential pseudogenes due to significant sequence variations and deviations in secondary structure within highly conserved regions.Three types(Type R1,R2,and R3)were identified as recombinants between Type A and B sequences,with simple crossing over and gene conversion as the most likely recombination mechanisms.These findings not only contribute to rRNA pseudogene identification but also shed light on the evolutionary dynamics of rRNA genes in teleost genomes.

ribosomal RNAtongue solenon-concerted evolutionpseudogenecrossing overgene conversion

Li Gong、Tingqi Jiang、Bilin Hu、Kaixin Wang、Nannan Zhang、Zengliang Miao

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National Engineering Laboratory of Marine Germplasm Resources Exploration and Utilization, Zhejiang Ocean University, Zhoushan 316022, China

Marine Science and Technology College, Zhejiang Ocean University, Zhoushan 316022, China

Basic Scientific Research Operating Expenses of Zhejiang Provincial UniversitiesZhoushan Science and Technology BureauNatural Science Foundation of Zhejiang ProvinceNational Natural Science Foundation of China

2021JZ0032021C21007Y21C19002331272273

2024

10.1007/s13131-024-2291-1

海洋学报(英文版)
中国海洋学会

海洋学报(英文版)

CSTPCD
影响因子：0.323
ISSN：0253-505X
年,卷(期)：2024.43(8)
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