Abstract: The Giemsa C-banding analyses of type species of Elymus L., Roegneria C. Koch and Hys-trix Moench in Triticeae were carried out by using an improved C-banding procedure. The Giemsa C-banding patterns among E. sibiricus R.caucasica and H. patula were distinct, indicating the interspecific differentiation of the three type species. Most of the Giemsa C-banding diferences of St,H or Y genome in E. sibiricus, R.caucasica and H.patula between other species were discussed.

Key words: Elymus

摘要： 采用改良的Giemsa C带技术，分析了小麦族披碱草属、鹅观草属和猬草属模式种的染色体C带带型。Elymus sibiricus、Roegneria caucasica和Hystrix patula的染色体在Giemsa C带带型上存在明显的差异，显示了这3个属模式种的物种特异性。3个模式种的Giemsa C带核型表明，C带带纹主要分布在染色体的末端和着丝粒附近，而中间带相对较少。对E.sibiricus、R.caucasica和H.patula的St、H、Y染色体组C带带型与其它物种的St、H、Y染色体组C带带型的差异进行了讨论。

关键词: 披碱草属, 鹅观草属, 猬草属, 模式种, Giemsa C带