1. Research and Development Center; Nippon Meat Packers, Inc.; Ibaraki Japan
2. Laboratory of Comparative Agricultural Sciences; Graduate School of Agriculture; Kyoto University; Kyoto Japan
3. Laboratory of Animal Breeding and Genetics; Graduate School of Environmental and Life Science; Okayama University; Okayama Japan
4. Laboratory of Animal Genetics; Graduate School of Science and Technology; Niigata University; Niigata Japan