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*Ye-jin Lee
National Academy of Agricultural Science, RDA, Suwon, 441-707, Korea1
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Jwa-Kyung Sung
National Academy of Agricultural Science, RDA, Suwon, 441-707, Korea1
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Jong-Sik Lee
National Academy of Agricultural Science, RDA, Suwon, 441-707, Korea1
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Byoung-Choon Jang
National Academy of Agricultural Science, RDA, Suwon, 441-707, Korea1
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Jae E. Yang
Department of Biological Environment, Kangwon University, Chunchon, 210-702, Korea2