Genet distribution of the snow blight fungus <i>Racodium therryanum</i> in a nursery of conifers in Hokkaido

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  • Iwakiri Ayuka
    Department of Forest Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • Sakaue Daisuke
    Chichibu Forest, The University of Tokyo
  • Matsushita Norihisa
    Department of Forest Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • Fukuda Kenji
    Department of Forest Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo

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Other Title
  • 北海道の針葉樹苗畑における暗色雪腐病菌（<i>Racodium therryanum</i>）のジェネット分布
  • 北海道の針葉樹苗畑における暗色雪腐病菌(Racodium therryanum)のジェネット分布
  • ホッカイドウ ノ シンヨウジュ ナエハタ ニ オケル アンショク ユキグサレビョウキン(Racodium therryanum)ノ ジェネット ブンプ

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Abstract

<p>We investigated the genet distribution of 117 isolates of the snow blight fungus Racodium therryanum isolated from seedlings of Picea jezoensis and P. glehnii in a nursery. Seven microsatellite (SSR) markers were used to identify genotypes of each isolate. Forty genotypes were detected and two of them were distributed widely in the nursery. These two genotypes didn’t form large continuous colonies but were mixedly distributed with other genotypes. This suggested that R. therryanum spreads not only by mycelial growth but also by dispersal of mycelia and organic matters infested with R. therryanum, which is accompanied by soil cultivation. On the other hand, eighty percent of genotypes were detected from only one seedling. Occurrence of various genets with low frequency suggested the possibility of sexual or parasexual reproduction of R. therryanum.</p>

Journal

  • Tree and Forest Health

    Tree and Forest Health 24 (3), 153-159, 2020-07-31

    Tree Health Research Society, Japan

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