Funding for this research was provided by:
National Natural Science Foundation of China (No.31872993)
Modern Agroindustry Technology Research System of China (CARS-41)
Received: 7 February 2019
Accepted: 20 September 2019
First Online: 23 October 2019
Ethics approval and consent to participate
: The protocol for this experiment was approved by the Animal Experimental Committee of South China Agricultural University (SYXK2014–0136).
: Not applicable.
: The authors declare that they have no competing interests.