Funding for this research was provided by:
Beijing Municipal Natural Science Foundation (grant 6182034)
Earmarked Fund for China Agriculture Research System (CARS-10-B21)
National Key R&D Program of China (2016YFE0133600)
Alabama Agricultural Experiment Station (N/A)
Article History
First Online: 25 March 2019
Compliance with Ethical Standards
:
: Authors declare not having any conflict of interest.