1. Miyazaki Livestock Research Institute Nishimorokata‐gun Miyazaki Japan
2. Graduate School of Life and Environmental SciencesTsukuba University Tsukuba Ibaraki Japan
3. Nippon Paper Industries Co., Ltd. Tokyo Japan
4. DKK‐TOA Yamagata Corporation Shinjo Yamagata Japan
5. Faculty of AgricultureIwate University Morioka Iwate Japan
6. Faculty of AgricultureTohoku University Sendai Japan
7. Institute of Livestock and Grassland ScienceNARO Tsukuba Ibaraki Japan