Funding for this research was provided by:
Minstry of Science and Technology of the People's Republic of China (2013AA102504, 2011BAD28B02, 2014ZX08009-053B)
Natural Science Foundation of Beijing Municipality (31072016, 31472065)
Natural Science Foundation of Beijing Municipality (6152013)
Ministry of Education of the People's Republic of China (IRT1191)
Beijing Municipal Bureau of Agriculture (BAIC06-2016)