^○Kigaki Masahiro¹, Ojima Koichi², Suzuki Takahiro¹, Kobayasi Ken¹, Nishimura Takanori¹ (1.Hokkaido graduate school of agriculture, 2.Nokenkikoutikusannken)

^○Suzuki Takahiro¹, Mori Aika¹, Hisaeda Kouga¹, Nishi Yuriko¹, Arimatsu Rio¹, Kobayashi Ken¹, Tatsumi Ryuichi², Ojima Koichi³, Nishimura Takanori¹ (1.Graduate School of Agrculture, Hokkaido Univ., 2.Graduate School of Agrculture, Kyushu Univ., 3.Division of Animal Products Research, NARO Institute of Livestock and Grassland Science)