Journal
BIOLOGIA
Volume 76, Issue 3, Pages 1087-1094Publisher
SPRINGER
DOI: 10.2478/s11756-020-00667-9
Keywords
Gnathopogon herzensteini; Mitochondrial genome; Genetic structure and composition; Phylogenetic analysis
Categories
Funding
- National Natural Science Foundation of China [51,779,210]
- Fundamental Research Funds of China West Normal University [19C007, CXTD2016-3]
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Herzensteini Gudgeon is a small fish species endemic to the upper reaches of the Jialing River and the Han River, with declining wild populations in recent decades. Research has shown controversial relationship between Gnathopogon and Gobiocypris genera, with Gobiocypris clustered within Gnathopogon genus.
Gnathopogon herzensteini is a small-sized fish endemic to the upper reaches of the Jialing River and the Han River. Wild populations of G. herzensteini have declined sharply during the past few decades and the phylogeny of this species has not yet fully resolved. Notably, the relationship between Gnathopogon and Gobiocypris genera still remains controversial. Scientific progress is hampered by the scarcity of molecular data for G. herzensteini. To address this problem, the complete mitochondrial genome of G. herzensteini were sequenced and characterised, and used to analyse its phylogenetic position within the subfamily Gobioninae. The genome is a circular molecule of 16,597 bases, consisting of 13 protein-coding genes, 2 rRNA genes, 22 tRNA genes, and a control region (D-loop). The nucleotide composition exhibited A/T bias: A 30.0%, T 27.0%, G 17.2%, and C 25.8%. Phylogenetic tree revealed that Gobiocypris clustered within the genus Gnathopogon, thus rendering it paraphyletic. The clade of genus Gnathopogon was closely related to Coreoleuciscus, with strong statistical support. These data are a stepping stone towards the understanding of genetics and phylogeny of G. herzensteini.
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