根据狗牙根 (Cynodon dactylon ( L. ) Pers. ) 19个外部性状对华东地区 34个点上的 88份狗牙根材料进行 Q聚类分析。 结果表明 ,华东地区狗牙根可分为 5个类型 ,即矮细型、矮粗型、斜细型、斜粗型和直立型。 主成分分析结果表明 ,营养器官是狗牙根形态分类的重要指标。 不同类型狗牙根坪用价值的排序为: 矮细型> 矮粗型> 斜细型> 斜粗型> 直立型。
 

Q clustering analysis was carried on 88 accessions from 34 sites of East China based on 19 morphological characters. The result show  that five types of C. dactylon can be distinguish ed, i. e. dw arf-fine type, dwarf-thick type, slanting-fine type, slanting-thick type and erect type. The result fo Principal Component Analysis ( PCA) shows that the vegetative characters are the major characters in morphological classification of C. dactylon. Turfgrass quality of five types of C. dacty lon is ranked as followings: dw arf-fine type>dwarf-thick type> slanting-fine type> slanting-thick type> erect type.