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Non-concerted evolution in ribosomal ITS2 sequence in Cynoglossus zanzibarensis (Pleuronectiformes: Cynoglossidae)
Gong, Li; Shi, Wei; Yang, Min; Si, Lizhen; Kong, Xiaoyu; Kong, XY (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, Guangdong Prov Key Lab Appl Marine Biol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510000, Guangdong, Peoples R China.
2016
Source PublicationBIOCHEMICAL SYSTEMATICS AND ECOLOGY
Volume66Pages:181-187
AbstractThe nuclear ribosomal RNA genes (nrDNA) include three rRNA genes (18S, 5.8S, and 28S) and two internal transcribed spacers (ITS1 and ITS2). The lack of variability in nrDNA has been explained as the result of concerted evolution. In fact, many examples of variation have been discovered, suggesting a non-concerted evolution process. There are few studies on ITS2 in teleostean fishes; particularly no reports on flatfishes. In this study, we focused on ITS2 in Zanzibar tonguesole, Cynoglossus zanzibarensis (Pleuronectiformes: Cynoglossidae). Three types of ITS2 sequences (Type A, B, and C) coexisted and mainly differ in length, nucleotide diversity (is), secondary structure, and minimum free energy. Based on these different features, Type B and C were speculated as the putative pseudogenic ITS2 region. Moreover, Type C sequences were detected as recombinant from crossing over between Type A and B sequences. To our knowledge, this is the first report on ITS2 recombination in animal ribosomal RNA genes. The high degree of ITS2 sequence polymorphism at the intraindividual level supported a non-concerted evolution pattern in the C zanzibarensis genome. These results provide useful data for further studies on ITS2 in flatfishes and contribute to polymorphism analyses of ribosomal RNA genes in teleostean fishes. (C) 2016 Elsevier Ltd. All rights reserved.
Department[Gong, Li; Shi, Wei; Yang, Min; Si, Lizhen; Kong, Xiaoyu] Chinese Acad Sci, South China Sea Inst Oceanol, Guangdong Prov Key Lab Appl Marine Biol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510000, Guangdong, Peoples R China; [Gong, Li; Yang, Min; Si, Lizhen] Univ Chinese Acad Sci, Beijing 100000, Peoples R China; [Shi, Wei] South China Sea Bioresource Exploitat & Utilizat, Guangzhou 510000, Guangdong, Peoples R China ; LMB
KeywordNrdna Recombination Crossing Over Pseudogene Dimethyl Sulfoxide
Subject AreaBiochemistry & Molecular Biology ; Environmental Sciences & Ecology ; Evolutionary Biology
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/15400
Collection中科院海洋生物资源可持续利用重点实验室
Corresponding AuthorKong, XY (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, Guangdong Prov Key Lab Appl Marine Biol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510000, Guangdong, Peoples R China.
Recommended Citation
GB/T 7714
Gong, Li,Shi, Wei,Yang, Min,et al. Non-concerted evolution in ribosomal ITS2 sequence in Cynoglossus zanzibarensis (Pleuronectiformes: Cynoglossidae)[J]. BIOCHEMICAL SYSTEMATICS AND ECOLOGY,2016,66:181-187.
APA Gong, Li,Shi, Wei,Yang, Min,Si, Lizhen,Kong, Xiaoyu,&Kong, XY .(2016).Non-concerted evolution in ribosomal ITS2 sequence in Cynoglossus zanzibarensis (Pleuronectiformes: Cynoglossidae).BIOCHEMICAL SYSTEMATICS AND ECOLOGY,66,181-187.
MLA Gong, Li,et al."Non-concerted evolution in ribosomal ITS2 sequence in Cynoglossus zanzibarensis (Pleuronectiformes: Cynoglossidae)".BIOCHEMICAL SYSTEMATICS AND ECOLOGY 66(2016):181-187.
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