1. Department
of Crop Science, Chungnam National University, Daejeon 305-754, Korea
2. Department
of Bio-Environmental Chemistry, Chungnam National University, Daejeon 305-764, Korea
3. National Agriculture
and Food Research Organization, Hokkaido Agricultural Research Center, Sapporo 062-8555, Japan
4. Department
of Biosystems Machinery Engineering, Chungnam National University, Daejeon 305-764, Korea