Identification and Validation of a Major Quantitative Trait Locus for Adult Plant Resistance Against Leaf Rust From the Chinese Wheat Landrace Bai Qimai
文献类型： 外文期刊
作者： Wang, Zhen 1 ; Jiang, Xu 1 ; Zhang, Yuzhu 1 ; Du, Ziyi 2 ; Feng, Jing 3 ; Quan, Wei 4 ; Ren, Junda 5 ; Che, Mingzhe 1 ; Zhang, Zhongjun 1 ;
作者机构： 1.China Agr Univ, Dept Plant Pathol, Beijing, Peoples R China
2.Open Univ China, Sch Agroforestry & Med, Beijing, Peoples R China
3.Chinese Acad Agr Sci, Inst Plant Protect, Beijing, Peoples R China
4.Beijing Acad Agr & Forestry Sci, Beijing Engn & Tech Res Ctr Hybrid Wheat, Beijing, Peoples R China
5.Beijing Univ Agr, Key Lab Northern Urban Agr, Minist Agr & Rural Affairs, Beijing, Peoples R China
关键词： adult plant resistance; slow rusting; leaf rust; QTL mapping; wheat landrace
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： Leaf rust caused by Puccinia triticina Eriks. (Pt) is a common disease of wheat worldwide. The Chinese wheat landrace Bai Qimai (BQM) has shown high resistance to leaf rust for a prolonged period of time; the infected leaves of BQM displayed high infection types (ITs), but they showed low disease severities at the adult plant stage. To find quantitative trait loci (QTL) for resistance to leaf rust, 186 recombinant inbred lines from the cross Nugaines x BQM were phenotyped for leaf rust response in multiple field environments under natural Pt infections and genotyped using the 90K wheat single nucleotide polymorphism (SNP) chip and simple sequence repeat (SSR) markers. A total of 2,397 polymorphic markers were used for QTL mapping, and a novel major QTL (QLr.cau-6DL) was detected on chromosome 6DL from BQM. The effectiveness of QLr.cau-6DL was validated using the three additional wheat populations (RL6058 x BQM, Aikang58 x BQM, and Jimai22 x BQM). QLr.cau-6DL could significantly reduce leaf rust severities across all tested environments and different genetic backgrounds, and its resistance was more effective than that of Lr34. Moreover, QLr.cau-6DL acted synergistically with Lr34 to confer strong resistance to leaf rust. We believe that QLr.cau-6DL should have high potential value in the breeding of wheat cultivars with leaf rust resistance.
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