Funding for this research was provided by:
Beijing University of Agriculture (GZL2014003)
National Natural Science Foundation of China (31872081, 31271582, 31471384)
Beijing Municipal Commission of Education (010135336400, 010155310500)
Natural Science Foundation of Beijing Municipality (5162004)
Article History
Received: 31 July 2018
Accepted: 2 April 2019
First Online: 16 April 2019
Competing Interests
: The authors declare no competing interests.