Funding for this research was provided by:
National Natural Science Foundation of China (21876108)
Special Fund for Agro-scientific Research in the Public Interest (201503107)
Shanghai Municipal International Cooperation Foundation (18230742900)
Article History
Received: 18 December 2018
Accepted: 1 April 2019
First Online: 10 April 2019
Compliance with ethical standards
: The author(s) declare that they have no competing interests.