The complete mitochondrial genome of bighead croaker, <Emphasis Type="Italic">Collichthys niveatus</Emphasis> (Perciformes,Sciaenidae): structure of control region and phylogenetic considerations |
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Authors: | Tian-jun Xu Yuan-zhi Cheng Yue-na Sun Ge Shi Ri-xin Wang |
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Institution: | (1) Key Laboratory for Marine Living Resources and Molecular Engineering, College of Marine Science, Zhejiang Ocean University, Zhoushan, 316000, People’s Republic of China; |
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Abstract: | Sciaenidae is a diverse, commercially important family. To understand the phylogenetic position of Collichthys niveatus in this family, we present its complete mitochondrial genome sequence. The genome is 16469 bp in length and contains 37 mitochondrial
genes (13 protein-coding genes, 2 ribosomal RNA genes and 22 transfer RNA genes) and a control region (CR) as in other bony
fishes. Further sequencing for the complete control region was performed on Collichthys lucida. Although the conserved sequence domains such as extend termination associated sequence (ETAS) and conserved sequence block
domains (CSB-1, CSB-2 and CSB-3) are recognized in the control region of the two congeneric species, the typical central conserved
blocks (CSB-F, CSB-E and CSB-D) could not be detected, while they are found in Miichthys miiuy and Cynoscion acoupa of Sciaenidae and other Percoidei fishes. Phylogenetic analyses do not support the monophyly of Pseudosciaeniae, which is
against with the morphological results. C. niveatus is most closely related to Larimichthys polyactis, and Collichthys and Larimichthys may be merged into one genus, based on the current datasets. |
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