cytogeography造句

• Based on extensive field observation and population sampling in 71 populations of 20 provinces , this dissertation investigates morphology , ecology , cytology , cytogeography and its sequences of this complex . the results show that a . ageratoides polyploid complex might be originated in northeastern china , from which it migrated along three different routes
  本研究基于对我国20个省、市、自治区43个地点71个三脉紫菀复合体居群的野外观察和采集，从形态学、生态学、细胞学、细胞地理学和分子生物学等各方面，对三脉紫菀多倍体复合体进行了综合性研究。