College of Animal Science;
National Engineering Research Center for Breeding Swine Industry;
South China Agricultural University;
Ministry of Agriculture;
Key Laboratory of Tropical Agricultural Environment;
South China Agricultural University;
Guangdong Enterprise Lab of Healthy Animal Husbandry and Environment Control;
Nanhai Entry-Exit Inspection and Quarantine Bureau;
Institute of Tropical Agriculture;
Universiti Putra Malaysia;
43400 Serdang;
Malaysia;