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*Hideyuki Funatsuki
National Agricultural Research Center for Hokkaido Region
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Makita Hajika
National Institute of Crop Science
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Tetsuya Yamada
National Institute of Crop Science
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Hiroyuki Tsuji
National Agricultural Research Center for Hokkaido Region
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Yoshinori Tanaka
Hokkaido Central Agricultural Experiment Station
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Yoshiaki Kimura
Hokkaido Central Agricultural Experiment Station
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Seiji Higihara
Tokachi Agricultural Experiment Station
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Masaaki Yuzawa
Tochigi Agricultural Experiment Station
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Atsushi Shinozaki
Tochigi Agricultural Experiment Station
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Masao Ishimoto
National Agricultural Research Center for Hokkaido Region
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Kaien Fujino
Graduate School of Agriculture, Hokkaido University