Main morphological characteristics were different between 10 alien disomic addition lines and their parents. Among them, linel and line 15 could resist powdery mildew effectively, and the resistance came from additive chromosomes of Elytrigia intermedium.

• 在主要形态特征和有关农艺性状方面10个异附加系均与亲本表现出不同程度的差异，其中Line1和Line15对白粉病表现为高抗到免疫，其抗病性来自于附加的中间偃麦草染色体。