摘要： 为了明确不同抗小麦白粉病基因聚合于推广品种后代的抗性表现，通过复合杂交，将抗小麦白粉病基因Pm4b，Pm13，Pm21聚合并转入推广品种，其后代(F1，F2)进行人工接种和表型抗病调查。结果表明，F1中凡是含有抗白粉病基因之一的材料均表现高抗或免疫。F2中Pm4b，Pm13和Pm21抗病基因聚合的抗病株占的比例最大(71.82%)，Pm13和Pm21，Pm4b和Pm21聚合的抗病株占的比例次之(66.67%，64.14%)，Pm4b和Pm13抗性基因聚合的抗病株占的比例较小(63.93%)。2个抗病基因聚合体中含有Pm21基因的抗性最好。

关键词: 小麦, 白粉病, 基因聚合, 抗病性, 遗传分析

Abstract: In order to study the disease resistance displays of descendant of improved varieties, which pyramid different resistance-genes, compound hybridizes were adopted, and 3 Powdery mildew resistance genes which were Pm4b, Pm13 and Pm21 were pyramid and transferred, then to carried on artificial infection for F1 and F2, and investigated the phenotype disease resistance. The results showed as follows: the materials which included one of the 3 genes displays very strong resistance or immunity in F1 for F2, the biggest proportion of resistant plants was (Pm4b×Pm13)×Pm21 (71.82% ), followed by Pm13×Pm21 (66.67% ) and Pm4b×Pm21 (64.14% ), and the least resistant plants was Pm4b×Pm21 (63.93% ). In addition, the pyramiding materials with 2 resistance-genes, one of which was Pm21 gene showed stronger disease resistance.

Key words: Wheat, Powdery mildew, Gene pyramiding, Disease resistance, Genetic analysis

中图分类号: 

• S512.0