华东地区狗牙根形态分类及其坪用价值

Taxonomy of Cynodon dactylon types in East China and their turfgrass quality

根据狗牙根（Ｃｙｎｏｄｏｎｄａｃｔｙｌｏｎ（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。

Q clustering analysis was carried on 88 accessions from 34 sites of East China based on 19 morphological characters. The result shows that five types of C. dactylon can be distinguished, i.e. dwarf 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. dactylon is ranked as followings: dwarf fine type>dwarf thick type>slanting fine type>slanting thick type>erect type.