^○Sasaki Osamu¹, Aihara Mitsuo², Nishiura Akiko¹, Takeda Hisato¹ (1.Institute of Livestock and Grassland Science, NARO, 2.Livestock Improvement Association Japan Inc.)

^○Yamazaki Takeshi¹, Takeda Histato², Hagiya Koichi³, Yamaguchi Satoshi⁴, Takusari Naozumi¹ (1.Hokkaido Agricultural Research Center, NARO, 2.Institute of Livestock and Grassland Science, NARO, 3.Obihiro Univ. of Agriculture and Veterinary Medicine, 4.Hokkaido Dairy Milk Recording and Testing Association)

^○Fujimoto Ikuko^1,2, Hanamure Takeshi¹, Hagiya Koichi² (1.Genetics Hokkaido assoc., 2.Obihiro Univ. of Agriculture and Veterinary Medicine)