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对具AABB染色体组的小麦属亚种及印度园粒小麦(具AABBDD染色体组)的一些春性材料进行了鉴定,以确定其对秆锈(Puccinia graminis Pers.:Pers.f.sp.tritci Eriks&Henn)的反应。本研究的目的是筛选可能的秆锈新抗源材料,并分析各种材料中已知秆锈抗性基因的同一性和未知秆锈抗性基因的最小数目。对美国农业部国家小谷类收藏处(USDA National Small GrainCo11ection)的164份材料用P.graminis tritici的35种分离菌种进行人工接种,把苗期的侵染型(IT)资料按感染程度进行分类,利用基因对基因概念箱栽设计确定了相应的抗病-无毒性基因对。在具AABB染色体组的材料中,可能的28个已知基因里,只有2个基因,即Sr9f和SrMCN属于35个不同的假定Sr基因之列,其余33个Sr基因与反应方式有关,这在以前未曾鉴别过。6份材料对所有秆锈分离菌种均表现抗性,有若干份材料对北美的秆锈优势小种具有抗性。印度园粒小麦不是抗秆锈Sr基因的良好基因源。
A few springy materials with AABB genomes of Triticum and Indigo (with AABBDD genome) were identified to determine their effect on Puccinia graminis Pers.: Pers.f.sp.tritci Eriks & Henn )Reaction. The purpose of this study was to screen for possible new stem rust resistant materials and to analyze the identities of known stem rust resistance genes and the minimum number of unknown stem rust resistance genes in various materials. 164 materials from the USDA National Small Grain Crop Division were artificially inoculated with 35 isolates of P. graminis tritici and the infective (IT) material at the seedling stage was classified by degree of infection , The use of genes on the concept of gene box planted to determine the appropriate resistance - non-toxic gene pairs. Of the 28 possible known genes in the AABB genome, only 2 genes, Sr9f and SrMCN, belong to 35 different putative Sr genes and the remaining 33 Sr genes are related to the reaction pattern Never identified before. Six of the materials showed resistance to all strains of stalk rust isolates, and several of the materials were resistant to the dominant stalk rust species in North America. Indian garden grain wheat is not a good source of resistance to stalk rust Sr gene.