1. Graduate School of Biosphere Science, Hiroshima University, Japan
2. Japanese Avian Bioresource Project Research Center, Hiroshima University, Japan
3. Faculty of Applied Biological Science, Gifu University, Japan
4. Collage of Agriculture, Ibaraki University, Japan
5. Department of Animal Science, Nippon Veterinary and Life Science University, Japan
6. Department of Genetics, Faculty of Agriculture, Minia University, Egypt
7. Kochi Prefectural Livestock Experimental Station, Japan