Association of Clubroot Resistance LocusPbBa8.1With a Linkage Drag of High Erucic Acid Content in the Seed of the European Turnip

文献类型： 外文期刊

第一作者： Zhan, Zongxiang

作者： Zhan, Zongxiang;Piao, Zhongyun;Jiang, Yingfen;Shah, Nadil;Hou, Zhaoke;Dun, Bicheng;Li, Zaiyun;Zhang, Chunyu;Jiang, Yingfen;Zhou, Yuanwei;Li, Shisheng;Zhu, Li

作者机构：

关键词： clubroot; Brassica napus; erucic acid; disease resistance; genetic improvement

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2020 年 11 卷

页码：

收录情况： SCI

摘要： Clubroot caused byPlasmodiophora brassicaeis a severe threat to the production ofBrassica napus, worldwide. The cultivation of resistant varieties is the most efficient and environmentally friendly way to limit disease spread. We developed a highly resistantB. napusline, ZHE226, containing the resistance locusPbBa8.1. However, ZHE226 seeds contain high erucic acid content, which limits its cultivation owing to its low edible oil quality. A segregation population of BC(3)F(2)was developed by crossing ECD04, a resistant European turnip donor, with Huangshuang5, an elite variety with no erucic acid in its seeds, as a recurrent plant. Fine mapping using the bulk segregation analysis sequencing (BSA-Seq) approach detectedPbBa8.1within a 2.9 MB region on chromosome A08. Interestingly, the previously reported resistance geneCrr1awas found in the same region. Genetic analysis revealed that the CAP-134 marker forCrr1awas closely linked with clubroot resistance (CR). Thus,PbBa8.1andCrr1amight be allelic for CR. Moreover, comparative and genetic analysis showed that high erucic acid in the seeds of ZHE226 was due to linkage drag offatty acid elongase 1(FAE1) in the ECD04 line, which was located in the interval ofPbBa8.1with a physical and genetic distance of 729 Kb and 1.86 cm, respectively. Finally, a clubroot-resistant line with a low erucic acid content was successfully developed through gene-specific molecular marker assistant selection from BC4F4. These results will accelerate CR breeding programs inB. napus.

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