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<p>This study presents a comprehensive phylogenetic analysis on Batrachospermaceae based on key taxonomic identifiers (<i>rbc</i>L, <i>psa</i>A, <i>psb</i>A, and COI-5P) from some genera. To systematically explore the phylogenetic relationships and taxonomy within Batrachospermaceae, we integrated molecular and morphological data, and explored the phylogeny, character evolution, and ancestral geographical origin and provided a theoretical support for the classification and geographic origination of Batrachospermaceae. Our findings reveal distinct relationships within the phylogenetic tree. Notably, 10 genera (<i>Sirodotia</i>, <i>Batrachospermum</i>, <i>Tuomeya</i>, <i>Volatus</i>, <i>Lympha</i>, <i>Nothocladus</i>, <i>Torularia</i>, <i>Sheathia</i>, <i>Nocturama</i>, and <i>Petrohua</i>) are closely associated in the <i>rbc</i>L phylogenetic tree. Additionally, four genera (<i>Kumanoa</i>, <i>Hoefkenia</i>, <i>Notohesperus</i>, and <i>Virescentia</i>) exhibit high support ratios, indicating their close interrelations. Other genera, including <i>Paludicola</i>, <i>Visia</i>, <i>Acarposporophycos</i>, <i>Macrosporophycos</i>, <i>Visioidea</i>, <i>Balliopsis</i>, and <i>Psilosiphon</i>, exhibit clustering traits. Furthermore, the multigene sequences provide a robust support for <i>Montagnia</i> that forms a monophyletic group. Ancestral reconstruction of morphological characters identifies nine primitive character states, including whorl, fascicle length, cortical cells, secondary fascicles, the shape of carpogonical branch, spermatangia, carposporophyte, carpogonium and trichogyne, with <i>Visia</i> likely representing ancestral traits in Batrachospermaceae. Furthermore, geographical origin maps suggest a potential common ancestral of Batrachospermaceae origin in the American continent. Additional to conventional analyses, including evolutionary and ancestral reconstruction investigations into key morphological characters, we attempt to reconstruct the biogeography within the Batrachospermaceae, thus contributing to a nuanced understanding of its origin.</p>

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Multi-locus phylogeny, morphological evolution and biogeography of Batrachospermaceae (Rhodophyta) based on multiple genetic sequences

  • 期刊论文

  • 发表日期：

    2025年8月26日

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  • Weinan Guo,
  • Fangru Nan,
  • Zhongshi He,
  • Xudong Liu,
  • Yang Liu,
  • Qi Liu,
  • Jia Feng,
  • Shulian Xie

摘要

This study presents a comprehensive phylogenetic analysis on Batrachospermaceae based on key taxonomic identifiers (rbcL, psaA, psbA, and COI-5P) from some genera. To systematically explore the phylogenetic relationships and taxonomy within Batrachospermaceae, we integrated molecular and morphological data, and explored the phylogeny, character evolution, and ancestral geographical origin and provided a theoretical support for the classification and geographic origination of Batrachospermaceae. Our findings reveal distinct relationships within the phylogenetic tree. Notably, 10 genera (Sirodotia, Batrachospermum, Tuomeya, Volatus, Lympha, Nothocladus, Torularia, Sheathia, Nocturama, and Petrohua) are closely associated in the rbcL phylogenetic tree. Additionally, four genera (Kumanoa, Hoefkenia, Notohesperus, and Virescentia) exhibit high support ratios, indicating their close interrelations. Other genera, including Paludicola, Visia, Acarposporophycos, Macrosporophycos, Visioidea, Balliopsis, and Psilosiphon, exhibit clustering traits. Furthermore, the multigene sequences provide a robust support for Montagnia that forms a monophyletic group. Ancestral reconstruction of morphological characters identifies nine primitive character states, including whorl, fascicle length, cortical cells, secondary fascicles, the shape of carpogonical branch, spermatangia, carposporophyte, carpogonium and trichogyne, with Visia likely representing ancestral traits in Batrachospermaceae. Furthermore, geographical origin maps suggest a potential common ancestral of Batrachospermaceae origin in the American continent. Additional to conventional analyses, including evolutionary and ancestral reconstruction investigations into key morphological characters, we attempt to reconstruct the biogeography within the Batrachospermaceae, thus contributing to a nuanced understanding of its origin.