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Identified Optimal Codons and Phylogenetic Relationship in Pseudobagrus Species Based on Complete Mitogenomes
Qian Qi1, Weixu Jiang1, Yanhui Sun2
1Henan Open Laboratory of Key Subjects of Environmental and Animal Products Safety, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China.
Animals : an Open Access Journal From MDPI
|January 28, 2026
Summary
This study clarifies the taxonomy of the freshwater catfish genus Pseudobagrus using mitochondrial genomes. Phylogenetic analysis reveals two main clades, supporting the genus
Area of Science:
- Ichthyology
- Molecular Systematics
- Genomics
Background:
- The genus Pseudobagrus comprises economically and ecologically important freshwater catfishes in East Asia.
- The taxonomy of Pseudobagrus is currently contentious and requires further investigation.
Purpose of the Study:
- To clarify the phylogenetic relationships within the genus Pseudobagrus.
- To provide a molecular basis for species delimitation and systematic revision.
Main Methods:
- Sequencing and analysis of complete mitochondrial genomes from 15 Pseudobagrus species.
- Phylogenetic tree construction using concatenated protein-coding genes.
Main Results:
- Mitochondrial genomes averaged 16,526–16,647 bp with conserved gene order and AT bias.
- Phylogenetic analysis identified two major clades, with Pseudobagrus trilineatus forming a distinct clade.
- The study identified cryptic diversity and taxonomic complexity within the genus.
Conclusions:
- The genus Pseudobagrus is monophyletic.
- Molecular data support a revised systematic framework for Pseudobagrus.
- Further taxonomic revisions are warranted based on the highlighted cryptic diversity.
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