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*Chul-Won Lee
Department of Crop Science, Chungbuk National University, Cheong-ju 361-763, Korea
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Sun-Hee Woo
Department of Crop Science, Chungbuk National University, Cheong-ju 361-763, Korea
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Je-Kyu Kim
Department of Plant Science, Chonnam National University, Kwangju, 500-757, Korea