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Diversity and similarity of wheat powdery mildew resistance among three allelic functional genes at the Pm60 locus

文献类型： 外文期刊

作者： Zou, Shenghao 1 ; Shi, Wenqi 2 ; Ji, Jiahao 1 ; Wang, Huanming 1 ; Tang, Yansheng 1 ; Yu, Dazhao 2 ; Tang, Dingzhong 1 ;

作者机构： 1.Fujian Agr & Forestry Univ, Plant Immun Ctr, State Key Lab Ecol Control Fujian Taiwan Crop Pes, Key Lab Minist Educ Genet, Fuzhou 2, Peoples R China

2.Hubei Acad Agr Sci, Inst Plant Protect & Soil Sci, Wuhan 430064, Peoples R China

3.Minist Agr Key Lab Integrated Pest Management Cro, Wuhan 430064, Peoples R China

关键词： Blumeria graminis f; sp; tritici; disease resistance; Pm60a; Pm60b; powdery mildew; Triticum aestivum; Triticum urartu

期刊名称：PLANT JOURNAL （ 影响因子：7.091； 五年影响因子：8.028 ）

ISSN： 0960-7412

年卷期： 2022 年 110 卷 6 期

页码：

收录情况： SCI

摘要： Cultivated wheat is continually exposed to various pathogens. Blumeria graminis f. sp. tritici (Bgt) causes powdery mildew disease and significant yield loss. Pm60 was cloned from Triticum urartu and confers race-specific powdery mildew resistance in wheat. Pm60a and Pm60b are allelic variants of Pm60 and have two leucine-rich repeat motifs deletions and insertions, respectively, which were detected in other T. urartu accessions. Through map-based cloning, virus-induced gene silencing, and stable transformation assays, we demonstrated that Pm60a and Pm60b conferred Bgt E09 resistance resembling that provided by Pm60. However, the homozygous Pm60a (but not Pm60 or Pm60b) transformants driven by the native promoters lacked race-specific resistance when they were inoculated with Bgt E18. As all three T. urartu accessions contained the three foregoing alleles, they had high resistance to Bgt E18. Pyramiding Pm60a with either of the allelic genes in F-1 plants did not cause mutual allele suppression or interference with Bgt E18 resistance. Deletion (but not insertion) of the two leucine-rich repeat motifs in Pm60a substantially narrowed the resistance spectrum. In T. urartu accession PI428210, we identified another locus adjacent to Pm60a and resistant to Bgt E18. Characterization of the alleles at the Pm60 locus revealed their diversity and similarity and may facilitate wheat breeding for resistance to powdery mildew disease caused by B. graminis f. sp. tritici.

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