Funding for this research was provided by:
National Basic Research Program of China (973 Program) (2016YFD0101602)
Received: 3 March 2020
Accepted: 26 July 2020
First Online: 11 September 2020
Ethics approval and consent to participate
: The Chinese Spring cultivar used in the experiment is supplied by Professor Ma Lingjian of Northwest Agricultural and Forestry University. These plant materials are widely used globally. This article does not contain any studies with human participants or animals and did not involve any endangered or protected species.
: Not applicable.
: The authors declare that they have no competing interests.