Funding for this research was provided by:
National Key Research and Development Project of China (2018YFD0501003)
China Agriculture Research System (CARS-36)
Hubei Provincial Creative TeamProject of Agricultural Science and Technology (2007-620)
Fundamental Research Funds for the Central Universities of China (2662017PY017)
Received: 25 December 2018
Accepted: 13 June 2019
First Online: 22 August 2019
: The experiment was carried out according to Chinese guidelines for animal welfare and the National Institutes of Health guide for the care and use of laboratory animals. All procedures related to animal feeding and sample collections were approved by the Huazhong Agricultural University Animal Care and Use Committee.
: All authors approved the final manuscript.
: The authors declare that they have no competing interests.