Funding for this research was provided by:
Yangfan project from Science and Technology Commission of Shanghai Municipality – PR China (14YF1408100)
the special research fund for the national non-profit institutes (2014T05)
Shanghai Municipal Agricultural Commission
Article History
Received: 19 March 2018
Revised: 27 April 2018
Accepted: 2 May 2018
First Online: 11 May 2018
Compliance with ethical standards
: This research did not involve human participants or animals.
: The authors declare that they have no conflict of interest.