1. Department of Crop Science, College of Agriculture & Life Sciences, Chungnam National University, 220 Gung-Dong, Yuseong-Gu, Daejeon, 305-754, Korea
2. Department of Crop Science, College of Agriculture, Life & Environment Sciences, Chungbuk National University, 410 Seongbong-ro, Heungdeok-gu, Cheongju 361-763, Korea
3. Department of Bio-Health Technology, College of Biomedical Science, Kangwon National University, 192-1 Hyoja 2-Dong, Chuncheon 200-701, Korea