1. Animal Breeding and Reproduction Division; NARO Institute of Livestock and Grassland
2. Graduate School of Life and Environmental Sciences; University of Tsukuba
3. Department of Animal Science; National Institute of Agrobiological Sciences; Tsukuba
4. Graduate School of Agricultural and Life Sciences; University of Tokyo; Kasama Japan
5. Vietnam Academy of Science and Technology; Hanoi Vietnam
6. Faculty of Veterinary Medicine; University of Bari; Bari Italy