1. College of Science, Hunan Agricultural University, Changsha 410128, China
2. Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha 410128, China
3. Agricultural Mathematical Modeling and Data Processing Center,
Hunan Agricultural University, Changsha 410128,
China
4. Department of Mathematics and Statistics, University of New Brunswick, Fredericton, New Brunswick E3B 5A3,
Canada