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<p>Three species, <i>Sphaerellopsis filum</i>, <i>S. macroconidialis</i>, and <i>S. paraphysata</i>, from Queensland and Victoria, Australia, were identified and characterised by multilocus sequence analyses. This study clarifies earlier reports of <i>Sphaerellopsis</i> in Australia and provides the first report of <i>S. filum</i> in Australia. We also confirm the presence of <i>S. macroconidialis</i> and <i>S. paraphysata</i> in Australia. A single-locus phylogeny based on the internal transcribed spacer (ITS) region of the ribosomal DNA (rDNA) provided sufficient resolution for species-level identification and yielded a topology consistent with that of the combined dataset of ITS, large subunit of the rDNA, and the RNA polymerase II second largest subunit. The high intron variability in the translation elongation factor 1-α region among <i>Sphaerellopsis</i> spp. made it unsuitable for phylogenetic analysis. The specimens and data generated here lay the groundwork for future studies into the evolution and molecular basis of mycoparasitism in <i>Sphaerellopsis</i>.</p>

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First molecular phylogeny of mycoparasitic species of Sphaerellopsis isolated from rust fungi in Australia

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月7日

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  • Jason Risteski,
  • Levente Kiss,
  • Alexander Idnurm,
  • Roger G. Shivas,
  • Yu Pei Tan,
  • Joshua Sun,
  • Niloofar Vaghefi

摘要

Three species, Sphaerellopsis filum, S. macroconidialis, and S. paraphysata, from Queensland and Victoria, Australia, were identified and characterised by multilocus sequence analyses. This study clarifies earlier reports of Sphaerellopsis in Australia and provides the first report of S. filum in Australia. We also confirm the presence of S. macroconidialis and S. paraphysata in Australia. A single-locus phylogeny based on the internal transcribed spacer (ITS) region of the ribosomal DNA (rDNA) provided sufficient resolution for species-level identification and yielded a topology consistent with that of the combined dataset of ITS, large subunit of the rDNA, and the RNA polymerase II second largest subunit. The high intron variability in the translation elongation factor 1-α region among Sphaerellopsis spp. made it unsuitable for phylogenetic analysis. The specimens and data generated here lay the groundwork for future studies into the evolution and molecular basis of mycoparasitism in Sphaerellopsis.