抗白粉病小麦-中间偃麦草双体异附加系的鉴定  

Identification of wheat- Elytrigia intermedium alien disomic addition line with powdery mildew resistance

作　　者：林小虎[1] 王黎明[1] 李兴锋[1] 赵逢涛[1] 高居荣[1] 李文才[1] 陆文辉[1] 王洪刚[1] 

机构地区：[1]山东农业大学农学院国家小麦改良中心泰安分中心

出　　处：《植物病理学报》2005年第1期60-65,共6页Acta Phytopathologica Sinica

基　　金：国家自然科学基金资助项目(39970458)

摘　　要：对从中间偃麦草与普通小麦品种烟农 15杂交后代(BC3F6 )中选育的双体异附加系山农Line15的形态学、白粉病抗性、细胞学、基因组荧光原位杂交(GISH)及RAPD进行鉴定分析。结果表明它的主要形态性状介于双亲之间;白粉病抗性鉴定结果表明山农Line15对白粉病高抗近免疫;根尖细胞染色体数目为 2n=44,PMCMⅠ染色体构型为 2n=22Ⅱ;以中间偃麦草总基因组DNA为探针的基因组荧光原位杂交(GISH),结果表明山农Line15是在小麦的遗传背景中附加了 2条中间偃麦草染色体,为小麦-中间偃麦草双体异附加系;遗传分析表明山农Line15的抗白粉病基因基本上可以确定来源于中间偃麦草的染色体;RAPD分析表明:在供试的 120个随机引物中有 1个引物S170 (- 5′- ACAACGCGAG -3′- )能在山农Line15中稳定地扩增出特异带型,可以作为山农Line15所附加的中间偃麦草染色体的特异分子标记。An alien disomic addition line ,Shannong Line15,which derived from the progeny of Elytrigia intermedium and common wheat Yannong 15(BC 3 F 6 ),was identified by morphology,powdery mildew resis- tance,cytology,genome in situ hybridization (GISH)and random amplified polymorphic DNA (RAPD)analysis.The results demonstrated that Shannong Line15,with the chromosome number of 2n=44 in root tip cells and chromosome configuration of 2n=22Ⅱat PMC MⅠ,was highly resistant or immune to powdery mildew and its main morphological traits were between that of their parents. The results of GISH with the probe of total genomic DNA of E. intermedium further proved that Shannong Line15 was an alien disomic addition line with a pair of E.intermedium chromosomes in wheat background .Genetic analysis showed that powdery mildew resistant genes of Shannong Line15 most probably came from the chromosomes of E.intermedium . Among 120 RAPD primers,the primer S170 (-5′-ACA ACG CGA G-3′-) could amplify specific bands of E.intermedium which could be used as RAPD markers for additional E.intermedium chromosomes of Shannong Line15.

关 键 词：双体异附加系 中间偃麦草 基因组荧光原位杂交 白粉病抗性 基因组DNA 抗白粉病基因 RAPD 染色体数目 染色体构型 杂交后代 小麦品种 鉴定分析 形态性状 鉴定结果 根尖细胞 遗传背景 随机引物 分子标记 分析表 形态学 细胞学 

分 类 号：S512.1[农业科学—作物学] S512.103.4