Skip to main content

ORIGINAL RESEARCH article

Front. Plant Sci.
Sec. Plant Breeding
Volume 15 - 2024 | doi: 10.3389/fpls.2024.1489013

Fine mapping of PmHHM, a broad-spectrum allele from a wheat landrace conferring both seedling and adult resistance to powdery mildew

Provisionally accepted
Fu Bisheng Fu Bisheng 1Feng Xu Feng Xu 2*Jizhong Wu Jizhong Wu 1*
  • 1 Institute of Crop Germplasm and Biotechnology, Jiangsu Academy of Agricultural Sciences (JAAS), Nanjing, China
  • 2 Anhui Science And Technology University, Fengyang, China

The final, formatted version of the article will be published soon.

    Common wheat is a leading global food crop that impacts food security. Wheat powdery mildew (PM), caused by Blumeria graminis f. sp. tritici (Bgt), poses a significant threat to grain yield and flour quality. The identification and utilization of broad-spectrum resistance genes against PM are essential for effective disease control. The wheat landrace Honghuamai (HHM) has demonstrated remarkable resistance in the field and is nearly immune to all 25 Bgt isolates used in seedling tests, making it an excellent source of PM resistance. This study investigated the inheritance of PM resistance in HHM using five segregating populations. PM resistance in HHM was determined by a single dominant gene, temporarily named PmHHM. By utilizing bulked segregant analysis and molecular marker mapping, PmHHM was fine-mapped to an interval with a genetic distance of 0.0031 cM and a physical distance of 187.4 kb on chromosome 4AL of the Chinese Spring reference sequence v.2.1. Four genes were identified in the target region, three of which encode nucleotide-binding leucine-rich repeat (NLR) proteins. Comparative genomic analysis revealed presence/absence variations (PAVs) of the PmHHM locus among common wheat varieties. These closely linked molecular markers will not only benefit the cloning of the gene underlying PmHHM but also facilitate the efficient utilization of the gene in breeding programs.

    Keywords: Blumeria graminus, Genetic Markers, Resistance breeding, Triticum aestivum, PmHHM

    Received: 31 Aug 2024; Accepted: 28 Nov 2024.

    Copyright: © 2024 Bisheng, Xu and Wu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Feng Xu, Anhui Science And Technology University, Fengyang, China
    Jizhong Wu, Institute of Crop Germplasm and Biotechnology, Jiangsu Academy of Agricultural Sciences (JAAS), Nanjing, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.