Scholarlink

Abstract <p>Genetic tools play a crucial role in fisheries management by enabling accurate species identification, assessment of genetic diversity, and clarification of evolutionary relationships. The family Siluridae, comprising 13 genera and 107 species, includes ecologically and economically significant freshwater catfishes distributed across Asia. However, their phylogenetic relationships and evolutionary history remain poorly resolved. This study investigates the phylogeny and divergence timing of Silurid species collected from different riverine systems of Odisha, India, using mitochondrial cytochrome oxidase subunit I gene sequences. The results revealed interspecific genetic distances among three <i>Ompok</i> species ranged from 13.2 to 17.8%, with <i>Wallago attu</i> forming a distinct sister clade (19.7–22.3% divergence). Divergence time analysis indicates that within the family Siluridae, <i>Pterocryptis</i> diverged first (~39.5 million years ago), followed by the separation of <i>Ompok</i> and <i>Wallago</i> (~31.7 million years ago). These divergence events align with major geological and climatic changes, including the Himalayan uplift and river system reorganization. This study highlights the role of tectonics, drainage evolution, and climatic shifts in shaping the diversification of Silurid catfishes and provides valuable insights for taxonomy and conservation.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Genetic Divergence in Catfish of Odisha (India) Based on DNA-Barcoding Data

  • 期刊论文

  • 发表日期：

    2026年5月27日

查看全文
  • S. Sura,
  • S. Roy,
  • A. K. Mishra,
  • J. K. Seth

摘要

Abstract

Genetic tools play a crucial role in fisheries management by enabling accurate species identification, assessment of genetic diversity, and clarification of evolutionary relationships. The family Siluridae, comprising 13 genera and 107 species, includes ecologically and economically significant freshwater catfishes distributed across Asia. However, their phylogenetic relationships and evolutionary history remain poorly resolved. This study investigates the phylogeny and divergence timing of Silurid species collected from different riverine systems of Odisha, India, using mitochondrial cytochrome oxidase subunit I gene sequences. The results revealed interspecific genetic distances among three Ompok species ranged from 13.2 to 17.8%, with Wallago attu forming a distinct sister clade (19.7–22.3% divergence). Divergence time analysis indicates that within the family Siluridae, Pterocryptis diverged first (~39.5 million years ago), followed by the separation of Ompok and Wallago (~31.7 million years ago). These divergence events align with major geological and climatic changes, including the Himalayan uplift and river system reorganization. This study highlights the role of tectonics, drainage evolution, and climatic shifts in shaping the diversification of Silurid catfishes and provides valuable insights for taxonomy and conservation.