摘要
以生物素（ｂｉｏｔｉｎ１６ｄＵＴＰ）标记的天蓝冰草（Ａｇｒｏｐｙｒｏｎｉｎｔｅｒｍｅｄｉｕｍ（Ｈｏｓｔ）Ｐ．Ｂ．＝Ｅｌｙｔｒｉｇｉａｉｎｔｅｒｍｅｄｉａ（Ｈｏｓｔ）Ｎｅｖｓｋｉ＝Ｔｈｉｎｏｐｙｒｕｍｉｎｔｅｒｍｅｄｉｕｍ（Ｈｏｓｔ）ＢａｒｋｗｏｒｔｈａｎｄＤｅｗｅｙ）染色体组ＤＮＡ为探针，普通小麦（ＴｒｉｔｉｃｕｍａｅｓｔｉｖｕｍＬ．）“中国春”ＤＮＡ为封闭，用荧光原位杂交（ＦＩＳＨ）技术对小冰麦３３号进行检测。结果表明：在一对染色体的端部显现出绿色荧光，这说明小冰麦３３号携带外源基因的冰草染色体片段位于小麦染色体端部，而且易位的染色体片段是较小的。从ＤＮＡ水平直接证明小冰麦３３是一个冰草染色体片段易位到小麦染色体端部的易位系。
The genomic DNA of wheatgrass (Agropyron intermedium (Host) P.B.=Elytrigia intermedia (Host) Nevski=Thinopyrum intermedium (Host) Barkworth and Dewey) was labelled with biotin16dUTP as a probe, and genomic DNA of common wheat (Triticum aestivum L.) “Chinese Spring” was used for blocking. Wheatwheatgrass line 33 was examined by fluorescence in situ hybridization (FISH) technique. The terminal regions of a pair of chromosomes showed green fluorescent signals. It has been concluded that chromosome segments containing alien genes of wheatgrass are located at the terminal regions of wheat chromosomes in wheatwheatgrass line 33, and the translocated segments were small. Wheatwheatgrass line 33 has been proved to be a translocation line with chromosome segments of wheatgrass translocated to the terminal regions of wheat chromosomes.
关键词
小麦
天蓝冰草
易位系
荧光原位杂交
Wheat, Wheatgrass, Translocation line, Fluorescence in situ hybridization
