The Complete Mitochondrial Genome Sequence and Phylogenetic Analysis of Saurogobio punctatus (Cypriniformes: Cyprinidae: Gobioninae) | [Pakistan Journal of Zoology • 2025]

Author(s):

1. Juan Guo: China West Normal University,Nanchong 637000,People's Republic of China

2. Yu Zeng: China West Normal University,Nanchong 637000,People's Republic of China

3. Jin Li: China West Normal University,Nanchong 637000,People's Republic of China

4. Ling Mao: China West Normal University,Nanchong 637000,People's Republic of China

5. Yu Shuang Zhao: China West Normal University,Nanchong 637000,People's Republic of China

Abstract:

Saurogobio punctatus is a small-sized freshwater fish, widely distributed in eastern Asia. Presently, eight species are recognized as valid in Surogobio, among which the complete mitochondrial genome information had been known for seven species, except for S. punctatus. The lack of information was partly due to the recent discovery and establish of S. punctatus in the genus Saurogobio only in 2018. In the present study, the complete mitochondrial genome of S. punctatus was determined and phylogenetic of Saurogobio was analyzed using the complete mitochondrial genome sequence. The genome was 16,600 bp in length, with 55.98% of (A + T) content. It consisted of 13 protein-coding genes, 2 ribosomal RNAs, 22 tRNAs and a control region. The gene composition and the structural arrangement of the S. punctatus complete mtDNA were identical to other Saurogobio species. Phylogenetic analyses indicated that S. punctatus was closely related to S. dabryi, with strong statistical support, and was regarded as the sister taxon of the clade formed by S. xiangjiangensis, S. gracilicaudatus and S. dabryi, distinctly separated from all other Saurogobio species. It was inconsistent with previous results; the possible reason could be the diferent sequence utilized in each study. Moreover, phylogenetic results based on whole mitochondrial genomes were more reliable than partial mitochondrial.

Page(s): 1099-1105

DOI: 10.17582/journal.pjz/20220630110656

Published: Journal: Pakistan Journal of Zoology, Volume: 57, Issue: 3, Year: 2025

Keywords:

mitochondrial genome , Phylogenetic , Genetic structure and composition , Saurogobio punctatus

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