Scholarlink

<p>Understanding the genetic structure of endemic species is essential for developing effective conservation and restoration strategies, particularly for taxa with narrowly restricted distributions. Here, we examined the population genomic structure of <i>Kichulchoia multifasciata</i>, an endemic freshwater fish confined to the Nakdong River basin on the Korean Peninsula. Using restriction site-associated DNA sequencing (RAD-seq), we genotyped 185 individuals collected from 10 sampling sites and identified 43,593 high-quality SNPs. Both neutral and putatively adaptive genetic loci were analyzed to assess population structure, connectivity, and local adaptation. Despite its ecological preference for upstream habitats—which typically promotes isolation in freshwater systems—<i>K. multifasciata</i> exhibited high genetic connectivity among sites. Analyses of 43,270 neutral SNPs revealed low levels of genetic differentiation among most sites, although two southwestern sites exhibited relatively distinct genetic signatures. In contrast, 13 adaptive SNPs displayed clear divergence between northern and central-southern sites, suggesting region-specific adaptation despite historical gene flow. These patterns of connectivity and local adaptation are now threatened by habitat fragmentation. Our findings indicate that the northern and central-southern sites should be recognized as distinct units to guide conservation strategies aimed at maintaining both connectivity and adaptive potential.</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

Population genomic structure of Kichulchoia multifasciata (Cobitidae) and implications for its conservation management

  • 期刊论文

  • 发表日期：

    2026年4月24日

查看全文
  • Jeonghun Kim,
  • Hyung-Bae Jeon,
  • Rawon Jeong,
  • Ho Young Suk

摘要

Understanding the genetic structure of endemic species is essential for developing effective conservation and restoration strategies, particularly for taxa with narrowly restricted distributions. Here, we examined the population genomic structure of Kichulchoia multifasciata, an endemic freshwater fish confined to the Nakdong River basin on the Korean Peninsula. Using restriction site-associated DNA sequencing (RAD-seq), we genotyped 185 individuals collected from 10 sampling sites and identified 43,593 high-quality SNPs. Both neutral and putatively adaptive genetic loci were analyzed to assess population structure, connectivity, and local adaptation. Despite its ecological preference for upstream habitats—which typically promotes isolation in freshwater systems—K. multifasciata exhibited high genetic connectivity among sites. Analyses of 43,270 neutral SNPs revealed low levels of genetic differentiation among most sites, although two southwestern sites exhibited relatively distinct genetic signatures. In contrast, 13 adaptive SNPs displayed clear divergence between northern and central-southern sites, suggesting region-specific adaptation despite historical gene flow. These patterns of connectivity and local adaptation are now threatened by habitat fragmentation. Our findings indicate that the northern and central-southern sites should be recognized as distinct units to guide conservation strategies aimed at maintaining both connectivity and adaptive potential.