Hee Chung Ji1, Joung Kyong Lee1, Gi Jun Choi1, Sung Seo1, and Hee Bong Lee2. (1) Grassland & Forages Division, National Institute of Animal Science, 9 Eoyongri, Seonghwan, Cheonan, South Korea, (2) Crop Science, Chungnam National University, 220 Gundong Yusong-gu, Daejeon