在普通小麦品种中国春与高抗赤霉病的亲缘物种鹅观草杂种回交后代ＢＣ２Ｆ１的基础上，对ＢＣ２Ｆ２－５，ＢＣ３Ｆ１－４等世代植株的形态，赤霉病抗性及细胞遗传学特征进行了观察及研究，结果表明：随着世代的增加，植株外部形态接近普通小麦；赤霉病抗性在高世代材料中仍得以保持；染色体数目的变异范围逐代缩小，在高世代中２ｎ＝４３，４４植株的比例增加，这展示了异附加系筛选的可喜前景 On the basis of BC2F1, a backcross progeny of the common relatives of Chinese spring and Fusarium oxysporum (Scophthalmus maximus), a common wheat cultivars, the morphological characters, scab resistance and cytogenetics of BC2F2-5 and BC3F1-4 The results showed that with the increase of generations, the external morphology of the plant was close to that of common wheat. The resistance of scab was maintained in the high-generation materials, and the variation range of chromosome number was reduced from generation to generation. 2n = 43, 44 The proportion of plants increased, demonstrating the promising prospects for the selection of isolates