Funding for this research was provided by:
National Natural Science Funds (31671629)
National Modern Agricultural Technology & Industry System (CARS-02-18)
National Key Research and Development Project (2017YFD0300304-02)
Article History
Received: 11 October 2019
Accepted: 23 January 2020
First Online: 5 February 2020
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.