94个小麦重要抗源品种抗秆锈病基因的推导  

Postulation of Resistant Genes to Stem Rust in 94 Cultivars of Wheat Important Resistant Resources

作　　者：张书绅[1] 邱永春[1] 姚平[1] 

机构地区：[1]沈阳农业大学北方农作物病害免疫实验室

出　　处：《沈阳农业大学学报》1998年第2期117-122,共6页Journal of Shenyang Agricultural University

基　　金：国家自然科学基金

摘　　要：利用含已知Ｓｒ５～Ｓｒ３８基因的３９个单抗基因系和１９个不同毒性的小麦秆锈菌系，对９４个小麦抗源品种进行了抗秆锈病基因的推导。结果有４个品种可能含有Ｓｒ３８基因或含有国际上尚未命名的新的抗病基因，有７２个品种可能含有Ｓｒ２２，Ｓｒ２６和Ｓｒ３１中的某些抗病基因或含有国际上尚未命名的新的抗病基因，有３个品种含有Ｓｒ３３基因，有１个品种含有Ｓｒ２１等基因。我国的小麦秆锈病菌对这８０个抗源品种表现无毒力或毒性频率很低，这些抗源品种是我国小麦抗秆锈病育种的有效抗源。Seedling resistant genes to stem rust were postulated in 94 wheat cultivars by comparing infection types produced on the cultivars with 39 near isogenic lines (or cultivars) known resistant genes (Sr5～Sr38) to 19 strains of Puccinia graminis f.sp.tritici contained different virultence genes.Resistant genes were postulated on the basis of the gene for gene concept.The 72 of 94 cultivars,as well as near isogenic lines (orcultivars) carried single gene Sr22,Sr26 or Sr31,were resistant to all tested strains (IT=0～2).They probably carried some gene(s) in the genes Sr22,Sr26 and Sr31 or possessed resistant gene(s) which have not been kown in the world so far.The 4 of 94 cultivars,as well as near isogenic line carrying sigle gene Sr38,were resistant to all tested strains (IT=0-0;).They probably carried gene Sr 38 or possessed resistant gene(s) which have not been known in th eworld so far.The 3 of 94 cultivars probably carried gene Sr33,while 1 cultivar probably carried gene Sr21.The strains of Puccinia graminis f.sp.tritici in China were unvirulence or had quite low virulence frequency to the 80 cultivars.They are effectively resistant resources for wheat breeding.

关 键 词：小麦秆锈病 抗源品种 抗病基因推导 Sr基因 

分 类 号：S512.103.2[农业科学—作物学] S432.21