1 Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot, 010031, China. tiannky@163.com.
2 Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot, 010031, China.
3 Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, China.
4 Faculty of Biosciences, Norwegian University of Life Sciences, As, Norway.
5 College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao, China. wujianghonglong@126.com.