A Completely Reversed Blackcheek Tonguefish, Symphurus plagiusa, from Duplin River, Georgia

1970 ◽  
Vol 11 (4) ◽  
pp. 260 ◽  
Author(s):  
Michael D. Dahlberg
Keyword(s):  
Symphurus Plagiusa

Marked intra-genomic variation and pseudogenes in the ITS1-5.8S-ITS2 rDNA of Symphurus plagiusa (Pleuronectiformes: Cynoglossidae)

2018 ◽  
Vol 68 (4) ◽  
pp. 353-365 ◽  
Author(s):  
Li Gong ◽  
Wei Shi ◽  
Min Yang ◽  
Xiaoyu Kong
Keyword(s):  
Gc Content ◽  
Rdna Sequence ◽  
Genomic Variation ◽  
Internal Transcribed Spacers ◽  
Sequence Length ◽  
Its2 Rdna ◽  
Rdna Cluster ◽  
Specific Level ◽  
Its2 Rdna Sequence ◽  
Symphurus Plagiusa

Abstract The eukaryotic ribosomal DNA (rDNA) cluster consists of multiple copies of three genes (18S, 5.8S, and 28S rDNA) and two internal transcribed spacers (ITS1 and ITS2). In recent years, an increasing number of rDNA sequence polymorphisms have been identified in numerous species. In the present study, we provide 33 complete ITS (ITS1-5.8S-ITS2) sequences from two Symphurus plagiusa individuals. To the best of our knowledge, these sequences are the first detailed information on ITS sequences in Pleuronectiformes. Here, two divergent types (Type A and B) of the ITS1-5.8S-ITS2 rDNA sequence were found, which mainly differ in sequence length, GC content, nucleotide diversity (π), secondary structure and minimum free energy. The ITS1-5.8S-ITS2 rDNA sequence of Type B was speculated to be a putative pseudogene according to pseudogene identification criteria. Cluster analysis showed that sequences from the same type clustered into one group and two major groups were formed. The high degree of ITS1-5.8S-ITS2 sequence polymorphism at the intra-specific level indicated that the S. plagiusa genome has evolved in a non-concerted evolutionary manner. These results not only provide useful data for ribosomal pseudogene identification, but also further contribute to the study of rDNA evolution in teleostean genomes.

scholarly journals Las comunidades de helmintos del lenguado (Symphurus plagiusa) en la costa de Campeche, México

2008 ◽  
Vol 79 (001) ◽  
Author(s):  
ABRIL RODRÍGUEZ GONZÁLEZ ◽  
VÍCTOR M. VIDAL MARTÍNEZ ◽  
BERNARDO DOMÍNGUEZ SÁNCHEZ
Keyword(s):  
Symphurus Plagiusa
Sign in / Sign up

Export Citation Format

Share Document