Fine Mapping of Clubroot Resistance Loci CRA8.1 and Candidate Gene Analysis in Chinese Cabbage (Brassica rapa L.)
文献类型： 外文期刊
作者： Wang, Yanyan 1 ; Xiang, Xianyu 1 ; Huang, Fan 1 ; Yu, Wenlin 1 ; Zhou, Xueqing 1 ; Li, Baojun 1 ; Zhang, Yunyun 1 ; Chen, Peng 1 ; Zhang, Chunyu 1 ;
作者机构： 1.Huazhong Agr Univ, Coll Plant Sci & Technol, Wuhan, Peoples R China
2.Hybrid Rape Res Ctr Shaanxi Prov, Shaanxi Rapeseed Branch Natl Ctr Oil Crops Genet I, Yangling, Peoples R China
3.Ind Crops Res Inst, Yunnan Acad Agr Sci, Kunming, Peoples R China
关键词： clubroot; Plasmodiophora brassicae; Brassica rapa; CRA8; 1; fine mapping
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：6.627； 五年影响因子：7.255 ）
ISSN： 1664-462X
年卷期： 2022 年 13 卷
页码：
收录情况： SCI
摘要： Clubroot is caused by Plasmodiophora brassicae, which threatens Brassicaceae crop production worldwide. In recent years, there has been an outbreak and rapid spread of clubroot in many major cruciferous crop-producing areas of China. In this study, we identified a cabbage material DingWen (DW) with different resistant capabilities from Huashuang5R (H5R) and Huayouza62R of Brassica napus, which are currently used as the main resistant cultivars for clubroot management in China. We used a next-generation sequencing-based bulked segregant analysis approach, combined with genetic mapping to identify clubroot-resistant (CR) genes from F-1 population generated from a cross between the DW (CR) and HZSX (clubroot susceptible). The CR locus of DW (named CRA8.1) was mapped to a region between markers A08-4346 and A08-4853, which contains two different loci CRA8.1a and CRA8.1b after fine mapping. The CRA8.1b loci contain a fragment of 395 kb between markers A08-4624 and A08-4853 on A08 chromosome, and it is responsible for the resistance to PbZj and PbXm isolates. However, together with CRA8.1a, corresponding to a 765-kb region between markers A08-4346 and A08-4624, then it can confer resistance to PbXm(+). Finally, through expression analysis between resistant and susceptible materials, two genes encoding TIR-NBS-LRR proteins (BraA08g039211E and BraA08g039212E) and one gene encoding an RLP protein (BraA08g039193E) were identified to be the most likely CR candidates for the peculiar resistance in DW.
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