本研究利用细胞学和同工酶电泳等方法对小偃麦二体异附加系３１５０４进行了鉴定；并在不同遗传背景下．分析了异附加染色体的传递特点。结果表明，３１５０４为３Ｆ２／７Ｆ２易位的二体异附加系，其单体异染色体通过胚囊和花粉传递的频率平均分别为２８．９％和２０．２％，且与遗传背景无关。 In this study, cytosolic and isozyme electrophoresis and other methods of Triticale double alien addition line 31504 were identified; and in different genetic backgrounds. The transmission characteristics of different additional chromosomes were analyzed. The results showed that 31504 was a 3F2 / 7F2 translocation allo-inbred line whose single heterochromosomes transmitted through embryo sac and pollen had an average frequency of 28.9% and 20.2%, respectively, and had no relationship with the genetic background.