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白粉病是世界范围内普通小麦最主要病害之一.黑麦6R染色体长臂上带有抗小麦白粉病的基因,Friebe等通过改良原有的6BS.6RL易位系,获得了抗白粉病的臂间易位,并经C-分带推测该抗病基因位于6R染色体近端三分之一的区域.由于已知6R染色体长臂近着丝点的部分与小麦第6组染色体部分同源,而中间一段则与第3组部分同源,近端一段与第7组同源,所以,更确切的分子标记6R染色体上抗白粉病基因的位置,对于有目的地创制抗白粉病的小片段易位系,即,将分子标记技术用于小麦抗白粉病育种,具有十分重要的意义.
Powdery mildew is one of the most important diseases of common wheat in the world. The rye long arm with chromosome 6R has the gene of resistance to wheat powdery mildew. Friebe et al obtained powdery mildew resistance by improving the original 6BS.6RL translocation line Arm translocation and deduced that the resistance gene located in the proximal third of chromosome 6R by C-banding.Because part of 6R chromosome long arm near the centromere is homologous to part of wheat chromosome 6 , Whereas the middle segment is partially homologous to Group 3 and the proximal segment is homologous to Group 7, so the more precise molecular marker for the position of the powdery mildew resistance gene on chromosome 6R is for a purposefully created powdery mildew resistant small Fragment translocation line, that is, the molecular marker technology for wheat powdery mildew breeding, is of great significance.