1Department of Crop Science, Chungbuk National University, Cheong-ju 361-763, Korea.
2Division of Life Science, Korea Basic Science Institute, Daejeon 305-333, Korea.
3Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon 305-764, Korea.
4Department of Supramolecular Biology, Yokohama City University, Maioka-cho 641-12, Yokohama, Japan.
5Breeding Resource Developments, National Institute of Crop Science, Suwon, 441-857, Korea.
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