1. Tohoku Agricultural Research Center, National Agriculture and Food Research Organization, Fukushima, Japan
2. Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization, Nasushiobara, Japan
3. Fukushima Agricultural Technology Centre, Fukushima Prefectural Government, Koriyama, Japan
4. Livestock Research Centre, Fukushima Prefectural Government, Fukushima, Japan
5. Graduate School of Agricultural and Life Sciences, The University of Tokyo,University, Tokyo, Japan
6. Hama Agricultural Regeneration Research Centre, Fukushima Agricultural Technology Centre, Minamisoma, Fukushima, Japan