Scholarlink

<p>Understanding genetic and phylogenetic relationships among closely related species is critical for effective conservation planning. In the Rio Conchos basin of northern Mexico, <i>Cyprinodon eximius</i> has a widespread distribution, occurring alongside neighboring microendemic species: <i>C. julimes</i>, <i>C. macrolepis</i>. <i>C. pachycephalus</i>, and <i>C. salvadori.</i> Both the widespread <i>C. eximius</i> and the microendemic congeners face threats from climate change and anthropogenic habitat modification. We utilized 20 nuclear microsatellites and sequenced the mitochondrial cytochrome b region to investigate the evolutionary history and genetic structuring among these taxa. Our analyses revealed multiple genetically distinct groups within <i>C. eximius</i>, including strong divergence in the Devils River, Texas, population. We also found support for recognizing the microendemic populations across the basin as distinct species. However, discordance between mitochondrial and nuclear data indicates historical introgression between many microendemic species and adjacent <i>C. eximius</i> populations in rivers connected to the Rio Conchos riverine habitats. These findings suggest that conservation efforts in the Rio Conchos basin should treat <i>C. eximius</i> populations in Mexico and Texas separately and recognize each microendemic population as an independent conservation unit.</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 genetic and phylogenetic analysis of pupfish (Cyprinodon, Cyprinodontidae) in the Rio Conchos and adjacent rivers reveals hidden diversity

  • 期刊论文

  • 发表日期：

    2026年3月5日

查看全文
  • Casey Ernest,
  • Michael Tobler,
  • Ma. Lourdes De Lozano-Vilano,
  • Mauricio De La Maza-Benignos,
  • Tracy A. Diver,
  • Wade D. Wilson,
  • Thomas F. Turner,
  • Evan W. Carson

摘要

Understanding genetic and phylogenetic relationships among closely related species is critical for effective conservation planning. In the Rio Conchos basin of northern Mexico, Cyprinodon eximius has a widespread distribution, occurring alongside neighboring microendemic species: C. julimes, C. macrolepis. C. pachycephalus, and C. salvadori. Both the widespread C. eximius and the microendemic congeners face threats from climate change and anthropogenic habitat modification. We utilized 20 nuclear microsatellites and sequenced the mitochondrial cytochrome b region to investigate the evolutionary history and genetic structuring among these taxa. Our analyses revealed multiple genetically distinct groups within C. eximius, including strong divergence in the Devils River, Texas, population. We also found support for recognizing the microendemic populations across the basin as distinct species. However, discordance between mitochondrial and nuclear data indicates historical introgression between many microendemic species and adjacent C. eximius populations in rivers connected to the Rio Conchos riverine habitats. These findings suggest that conservation efforts in the Rio Conchos basin should treat C. eximius populations in Mexico and Texas separately and recognize each microendemic population as an independent conservation unit.