Identification of a new type of resistance breaking strain of tomato spotted wilt virus on tomato bearing the Sw-5b resistance gene

被引：9
作者：
Almasi, Aszteria [1 ]
Pinczes, Dora [1 ]
Timar, Zoltan [2 ]
Saray, Reka [1 ]
Palotas, Gabor [2 ]
Salanki, Katalin [1 ]
机构：
[1] Eotvos Lorand Res Network, Plant Protect Inst, Ctr Agr Res, Budapest, Hungary
[2] Univer Prod Plc, Kecskemet, Hungary
来源：
EUROPEAN JOURNAL OF PLANT PATHOLOGY | 2023年 / 166卷 / 02期
关键词：
TSWV; NSm; Movement protein (MP); Resistance breaking; Solanum lycopersicum; Sw5-b resistance gene; TOSPOVIRUS; INHERITANCE; EMERGENCE; SPECTRUM; PROTEIN; TSWV;
D O I：
10.1007/s10658-023-02656-5
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
Sw-5b is a widely used resistance gene in tomato breeding to control tomato spotted wilt virus (TSWV). The NSm protein encoded by TSWV is identified as the avirulence (AVR) determinant in Sw-5b-mediated resistance. In the last decades, Sw-5b resistance breaking (RB) isolates were found and identified in many locations around the world. The resistance-breaking phenotype in all the previously verified TSWV Sw-5b RB strains is associated with the NSmC118Y or NSmT120N mutations. In the summer of 2022, a Sw-5b RB TSWV strain was recognized in a greenhouse in Hungary. In inoculation experiments this strain was able to infect tomato plants with the Sw-5b resistance gene. Molecular analysis of the NSm avirulence determinant revealed a single alteration in the NSm protein, D122G mutation was identified. To our knowledge, this is the first report to identify this amino acid alteration associated with resistance-breaking phenotype in Sw-5b resistant tomato plants.
引用
收藏
页码：219 / 225
页数：7
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