Relationship between intraspecific variations and host insects of <i>Ophiocordyceps nutans</i> collected in Japan

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  • Sasaki Fumito
    Laboratory of Forest Resource Biology, Graduate School of Agriculture, Hokkaido University, N9-W9, Kita-ku, Sapporo 060-8589, Japan
  • Miyamoto Toshizumi
    Laboratory of Forest Resource Biology, Graduate School of Agriculture, Hokkaido University, N9-W9, Kita-ku, Sapporo 060-8589, Japan
  • Yamamoto Aki
    Otaru Museum, 1-3-6 Temiya, Otaru 047-0041, Japan
  • Tamai Yutaka
    Laboratory of Forest Resource Biology, Graduate School of Agriculture, Hokkaido University, N9-W9, Kita-ku, Sapporo 060-8589, Japan
  • Yajima Takashi
    Laboratory of Forest Resource Biology, Graduate School of Agriculture, Hokkaido University, N9-W9, Kita-ku, Sapporo 060-8589, Japan

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  • Relationship between intraspecific variations and host insects of Ophiocordyceps nutans collected in Japan

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<p>To investigate the host specificity of Ophiocordyceps nutans against hemipteran insects in the wild, we determined the relationship between host species and rDNA-internal transcribed spacer (ITS) variation in O. nutans. The analyzed fungal specimens infected 16 host species belonging to four families of Hemiptera. The molecular phylogenetic analysis revealed that O. nutans can be classified into two types corresponding to their host families. The genetic distance values between the two types were very remote (>0.084), and the strains of O. nutans that parasitized Halyomorpha halys and Plautia crossota stali, well-known insect pests, formed a subclade. The results suggest that O. nutans should have host specificity which can be valuable for developing biological control agents against specific hemipteran insects.</p>

Journal

  • Mycoscience

    Mycoscience 53 (2), 85-91, 2012

    The Mycological Society of Japan

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