1. Department of Crop Science, College of Agriculture and Life Sciences, Chungnam National University, 220 Gung-Dong, Yuseong-Gu, Daejeon 305-764, Korea
2. National Agricultural Research Center for Hokkaido Region, Shinsei, Memuro, Kasai-gun, Hokkaido, 082-0081 Japan
3. Department of Bio-Environmental Chemistry, College of Agriculture and Life Sciences, Chungnam National University, 220 Gung-Dong, Yuseong-Gu, Daejeon 305-764, Korea
4. Department of Crop Science, College of Agriculture, Life and Environment Sciences, Chungbuk National University, 410 Seongbong-ro, Heungdeok-gu, Cheongju 361-763, Korea
5. Department of Bio-Health Technology, College of Biomedical Science, Kangwon National University, 192-1 Hyoja 2-Dong, Chuncheon 200-701, Korea