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*Eka Novriyanti
Graduate School of Agriculture, Hokkaido University
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Makoto Watanabe
Research Faculty of Agriculture, Hokkaido University
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Yasutomo Hoshika
Research Faculty of Agriculture, Hokkaido University
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Yasuyuki Hashidoko
Research Faculty of Agriculture, Hokkaido University
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Koike Takayoshi
Research Faculty of Agriculture, Hokkaido University