Funding for this research was provided by:
National Natural Science Foundation of China (61271364)
the High-level Talents Fund of Qingdao Agricultural University (1116022)
A Project of Shandong Province Higher Educational Science and Technology Program (J17KA154)
Article History
Received: 15 March 2018
Accepted: 26 June 2018
First Online: 16 July 2018