Identification and Validation of a Major Quantitative Trait Locus for Adult Plant Resistance Against Leaf Rust From the Chinese Wheat Landrace Bai Qimai

Zhen Wang; Xu Jiang; Yuzhu Zhang; Ziyi Du; Jing Feng; Wei Quan; Junda Ren; Mingzhe Che; Zhongjun Zhang

doi:10.3389/fpls.2022.812002

Frontiers in Plant Science (May 2022)

Identification and Validation of a Major Quantitative Trait Locus for Adult Plant Resistance Against Leaf Rust From the Chinese Wheat Landrace Bai Qimai

Zhen Wang,
Xu Jiang,
Yuzhu Zhang,
Ziyi Du,
Jing Feng,
Wei Quan,
Junda Ren,
Mingzhe Che,
Zhongjun Zhang

Affiliations

Zhen Wang: Department of Plant Pathology, China Agricultural University, Beijing, China
Xu Jiang: Department of Plant Pathology, China Agricultural University, Beijing, China
Yuzhu Zhang: Department of Plant Pathology, China Agricultural University, Beijing, China
Ziyi Du: School of Agroforestry & Medicine, Open University of China, Beijing, China
Jing Feng: Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
Wei Quan: Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agricultural and Forestry Sciences, Beijing, China
Junda Ren: Key Laboratory for Northern Urban Agriculture of Ministry of Agriculture and Rural Affairs, Beijing University of Agriculture, Beijing, China
Mingzhe Che: Department of Plant Pathology, China Agricultural University, Beijing, China
Zhongjun Zhang: Department of Plant Pathology, China Agricultural University, Beijing, China

DOI: https://doi.org/10.3389/fpls.2022.812002
Journal volume & issue: Vol. 13

Abstract

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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 × 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 × BQM, Aikang58 × BQM, and Jimai22 × 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.

Published in Frontiers in Plant Science

ISSN: 1664-462X (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Agriculture: Plant culture
Website: https://www.frontiersin.org/journals/plant-science

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