1. Animal Genome Research Unit; National Institute of Agrobiological Sciences; 2 Ikenodai Tsukuba Ibaraki 305-8602 Japan
2. Animal Research Division; Institute of Japan Association for Techno-innovation in Agriculture; Forestry and Fisheries; 446-1 Ippaizuka Kamiyokoba Tsukuba Ibaraki 305-0854 Japan
3. Agroinformatics Division; National Agriculture and Food Research Organization; Agricultural Research Center; 3-1-1 Kannondai Tsukuba Ibaraki 305-8666 Japan
4. Central Research Institute for Feed and Livestock ZEN-NOH (National Federation of Agricultural Cooperative Associations); Kamishihoro Hokkaido 080-1406 Japan
5. Advanced Genomics Laboratory; National Institute of Agrobiological Sciences; 1-2 Owashi Tsukuba Ibaraki 305-8634 Japan
6. Animal Immune and Cell Biology Research Unit; National Institute of Agrobiological Sciences; 2 Ikenodai Tsukuba Ibaraki 305-8602 Japan