Institute of Genetics and Cytology, Northeast Normal University, Changchun, PR China. nenu_huangyx@tom.com|Institute of Genetics and Cytology, Northeast Normal University, Changchun, PR China. nenu_huangyx@tom.com|Institute of Genetics and Cytology, Northeast Normal University, Changchun, PR China. nenu_huangyx@tom.com|Institute of Genetics and Cytology, Northeast Normal University, Changchun, PR China. nenu_huangyx@tom.com|Institute of Genetics and Cytology, Northeast Normal University, Changchun, PR China. nenu_huangyx@tom.com|Institute of Genetics and Cytology, Northeast Normal University, Changchun, PR China. nenu_huangyx@tom.com