RESUMO
The Pseudorhombus dupliocellatus belongs to family Paralichthyidae of Pleuronectiformes. In this study, the complete mitochondrial genome of P. dupliocellatus is determined and described. The mitogenome is 16 621 bp in length and consists of 13 protein-coding genes, 22 tRNAs, 2 rRNAs, a control region, and a L-strand replication origin. The arrangement of the mitogenome is identical to that of the typical teleost. The overall base composition is 26.9%, 25.3%, 31.0%, and 16.8% for A, T, C, and G, respectively, with a slight bias on A+T content (52.2%). The phylogenetic tree of 13 species all in Pleuronectiformes demonstrated that P. dupliocellatus, as well as the other Paralichthyidae fishes containing Paralichthys olivaceus and Pseudorhombus cinnamoneus, clustered in a clade and had a closer relationship with Pleuronectidae species than Bothidae ones. This study is expected to contributing to the systematic evolution of Paralichthyidae and further Pleuronectiformes.
Assuntos
Genes Mitocondriais , Genoma Mitocondrial , Filogenia , Animais , Composição de Bases , Sequência de Bases , DNA Mitocondrial , Linguados/genética , Ordem dos Genes , Genômica , Análise de Sequência de DNARESUMO
Zebrias crossolepis belongs to the family Soleidae of Pleuronectiformes. This species and its congeners are characterized by eyes on right side and a compressed body with only anterior half of caudal fin margin connected with dorsal and anal fins. In this article, we determined and described the complete mitogenome of Z. crossolepis. The genome is 16,734 bp in length, and is typically consist of 37 genes, including 13 protein-coding, two ribosomal RNA, 22 transfer RNA genes, as well as a putative control region and an L-strand replication origin. The gene organization is identical to that of typical bony fishes. The overall base composition is 28.3, 26.4, 30.0, and 15.3% for A, T, C, and G, respectively, with a slight bias on AT content (54.7%). This result is expected to contribute to understanding the systematic evolution of the genus Zebrias and further phylogenetic studies of Soleidae and Pleuronectiformes.
Assuntos
DNA Mitocondrial/genética , Linguados/genética , Genoma Mitocondrial/genética , Mitocôndrias/genética , Análise de Sequência de DNA/veterinária , Animais , Composição de Bases/genética , Sequência de Bases , China , Linguados/anatomia & histologia , Tamanho do Genoma/genética , RNA Ribossômico/genética , RNA de Transferência/genética , TaiwanRESUMO
Generally, the mitochondrial genome is characterized by the property of highly conserved organization. After comparing the 1,255 fish complete mitogenome sequences deposited in GenBank (as of Nov. 3, 2013), approximately 52 complete mitogenomes are found to have been rearranged. Of these species, three types of rearrangement-shuffling, translocation, and inversion-have been found. Further analysis shows that the sites of the rearrangements occur frequently in WANCY cluster, IQM cluster, ND6 gene, control region (D-loop) and its adjacent genes. Based on the four models that explain the gene rearrangements commonly adopted by scientists, we attempted to infer the possible mechanisms for the three types of gene rearrangement as well as the application of gene rearrangement in phylogenetic studies.