Comparative mitogenomic analysis of Chinese cavefish Triplophysa (Cypriniformes: Nemacheilidae): novel gene tandem duplication and evolutionary implications.

ABSTRACT:

Background

Cavefish exhibit significant morphological changes that result in trade-offs in metabolic requirements and energy utilization in perpetual darkness. As cellular "powerhouses", mitochondria play crucial roles in energy metabolism, suggesting that mitochondrial genes have likely experienced selective pressures during cavefish evolution.

Results

This study presents the first assembly of the complete mitogenome of Triplophysa yangi, a typical cavefish species in China. The mitogenome is 17,068 bp long, marking the longest recorded for the genus Triplophysa, and includes 13 protein-coding genes (PCGs), 2 rRNAs, 25 tRNAs, and a noncoding control region. An ~ 500 bp insertion between ND2 and WANCY regions was observed, comprising a large intact tandem repeat unit (A'-N'-

SUBMITTER: Song S 

PROVIDER: S-EPMC11934697 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature