College of Mathematics and Physics, Qingdao University of Science and Technology, Qingdao, China.|College of Mathematics and Physics, Qingdao University of Science and Technology, Qingdao, China.|Bioinformatics and Mathematical Biosciences Lab, Department of Agronomy, Horticulture and Plant Science, South Dakota State University, Brookings, SD, USA.|College of Mathematics and Physics, Qingdao University of Science and Technology, Qingdao, China.|School of Mathematics, Shandong University, Jinan, China.|Bioinformatics and Mathematical Biosciences Lab, Department of Agronomy, Horticulture and Plant Science, South Dakota State University, Brookings, SD, USA.