Project description:Gymnogobius heptacanthus is a small intertidal species belonging to the family Gobiidae. Herein, we report the first sequencing and assembly of the complete mitochondrial genome of G. heptacanthus. The complete mitochondrial genome is 16,529 bp long and has the typical vertebrate mitochondrial gene arrangement, consisting of 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes, and a control region. Phylogenetic analysis using mitochondrial genomes of 12 species showed that G. heptacanthus is clustered with G. urotaenia and G. petschiliensis and rooted with other Gobiidae species. This mitochondrial genome provides potentially important resources for addressing taxonomic issues and studying molecular evolution.

| S-EPMC7800937 | biostudies-literature

Sequencing and analysis of the complete mitochondrial genome of Gymnogobius laevis.

Project description:Gymnogobius laevis (Steindachner, 1879) is a small, benthic freshwater fish. In a previous study, it was reported as a rare resident in Heilongjiang Province. In this study, the mitochondrial genome of G. laevis was sequenced. It is 16,519 base pairs (bp) in length and contains 13 protein-coding genes, two ribosomal RNA genes (12S rRNA and 16S rRNA), 22 transfer RNA genes (tRNA), and two non-coding control regions. The A + T content is 55.71% in the G. laevis mitochondrial genome. A phylogenetic tree shows that G. laevis is closely related to the family Gobiinae based on complete mitogenome sequences.

| S-EPMC9176352 | biostudies-literature

The complete mitochondrial genome of Gymnogobius Petschiliensis (Gobiiformes; Gobiidae; Gobionellinae) and its phylogenetic implications.

Project description:Of the goby fishes, many Gymnogobius species have been poor recognized mainly because of the absence of enough molecular information and clear phylogenetic framework. In this study, the complete mitochondrial genome of Gymnogobius petschiliensis was determined and described. The mitogenome is 16,422?bp in length and consists of 22 tRNAs, 13 protein-coding genes, two rRNAs, one control region and a light strand replication origin (OL). The arrangement of this mitogenome is identical to that of the typical teleost. The overall base composition is 27.5%, 29.5%, 26.1%, and 16.9%, for A, T, C, and G, respectively, with a slight bias on A?+?T content (57.0%). The 13 protein-coding genes use the initiation codon ATG except COI, which uses GTG. Most of them use TAA or TAG as the stop codon, while COII, COIII, and Cyt b use an incomplete T or TA and ND4 uses an unusual AGA. The maximum-likelihood phylogeny tree of 19 Gobionellinae species demonstrated that G. petschiliensis had a very closely relationship with the same genus G. urotaenia. This study is expected to contributing to the phylogenetic evolution of G. petschiliensis and further phylogenetic relationship of Gobionellinae and Gobiiformes.

| S-EPMC7799598 | biostudies-literature

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