^○Kawakami Jumpei¹, Baba Toshimi¹, Goto Yusaku¹, Oka Tarou², Yamaguti Satoshi³, Nakagawa Satoshi³, Abe Hayato³, Kawahara Takayoshi¹ (1.Holstein Cattle Association of Japan, Hokkaido Branch, 2.Holstein Cattle Association of Japan, 3.Hokkaido Dairy Milk Recording and Testing Association)

^○Haneda Masaki¹, Takahata Hiroshi¹, Kumagai Mitsuhiro¹, Sasaki Osamu² (1.Iwate Agricultural Research Center Animal Industry Research Institute, 2.National Agriculture and Food Research Organization)

^○Yamaguchi Satoshi¹, Masuda Yutaka², Takeda Hisato³, Hagiya koichi⁴, Yamazaki Takeshi⁵, Nakagawa Satoshi¹, Abe Hayato¹, Gotoh Yusaku⁶, Baba Toshimi⁶, Kawakami Junpei⁶, Kawahara Takayoshi⁶ (1.Hokkaido Dairy Milk Recording and Testing Association, 2.Georgia Univ., 3.Institute of Livestock and Grassland Science, NARO, 4.Obihiro Univ., 5.Hokkaido Agricultural Research Centre, NARO, 6.Holstein Cattle Association of Japan, Hokkaido Branch)