Phylogenetic study of clavicipitaceous fungi using acetaldehyde dehydrogenase gene sequences

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Abstract

<p> Aciculosporium and Heteroepichloë (Clavicipitaceae) are characteristic bambusicolous fungi in east Asia. In this study, we examined their intergeneric relationships based on the ALDH1-1 gene, which encodes a member of the aldehyde dehydrogenase family. In the clavicipitaceous fungi examined in this study, the nucleotide sequence of the third exon of ALDH1-1 (Exon-3) is 889 bp in length and has no insertion/deletion. A phylogenetic tree based on Exon-3 indicated that the clavicipitaceous fungi could be divided into two large groups: Cordyceps, Nomuraea, and Ustilaginoidea species formed a paraphyletic group, and the other grass biotrophic species formed a monophyletic group. This monophyletic group was further divided into three groups with high bootstrap support: i.e., species with Neotyphodium anamorphs (e.g., Epichloë), species with Ephelis anamorphs (e.g., Heteroepichloë), and Aciculosporium–Claviceps species. We discuss the relationships among Aciculosporium, Heteroepichloë, and other clavicipitaceous fungi.</p>

Journal

  • Mycoscience

    Mycoscience 49 (2), 115-125, 2008

    The Mycological Society of Japan

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