1. Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, China
2. International Joint Research Laboratory in Universities of Jiangsu Province of China for Domestic Animal Germplasm Resources and Genetic Improvement, Yangzhou University, Yangzhou, China
3. College of Animal Science and Technology, Yangzhou University, Yangzhou, China
4. International Centre for Agricultural Research in the Dry Areas, Addis Ababa, Ethiopia