[1]MOE Key Laboratory for Molecular Animal Nutrition College of Animal Sciences Zhejiang University 866 Yu Hang Tang Road Hangzhou 310058 China;
[2]College of Life Sciences Southwest University Chongqing 400715 China;
[3]College of Life Sciences Zhejiang University 866 Yu Hang Tang Road Hangzhou 310058 China;
liver development; hepatopancreatic duct (HPD); hhex; pdx1; cdxlb;