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							Yoichi ASAKO
														
									Laboratory of Crop Science and Plant Breeding, Faculty of Agriculture, Shinshu University
							 
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							Akio UJIHARA
														
									Laboratory of Crop Science and Plant Breeding, Faculty of Agriculture, Shinshu University
							 
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							Toshiko MATANO
														
									Laboratory of Crop Science and Plant Breeding, Faculty of Agriculture, Shinshu University