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*hiroyuki Sugimoto
Agriculture and Forestry General Engineering Center,Yamaguchi
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koji Matunaga
Forestry ans Forest Products Reserarch Institute Forest Tree Breeding Center,Kyusyu Regional Breeding Office
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syota Jikumaru
Agricultural Technology Research Center, Hiroshima Prefectural Technology Research Institute
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Katsumi Togashi
Graduate School of Agricultural and Life Sciences, The University of Tokyo