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ORIGINAL RESEARCH article

Front. Plant Sci.
Sec. Functional and Applied Plant Genomics
Volume 15 - 2024 | doi: 10.3389/fpls.2024.1409095

Three novel QTLs for FHB resistance identified and mapped in spring wheat PI672538 by bulked segregant analysis of the recombinant inbred line

Provisionally accepted
Qianglan Huang Qianglan Huang 1*Xin Li Xin Li 1Qing Li Qing Li 2Shengfu Zhong Shengfu Zhong 3Xiuying Li Xiuying Li 3Jiezhi Yang Jiezhi Yang 4Feiquan Tan Feiquan Tan 3Tianheng Ren Tianheng Ren 3Zhi Li Zhi Li 3Yang Suizhuang Yang Suizhuang 1*
  • 1 Southwest University of Science and Technology, Mianyang, China
  • 2 Chongqing Industry and Trade Polytechnic Institute, Fuling, Chongqing, China
  • 3 College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan Province, China
  • 4 Neijiang Academy of Agricultural Sciences, Sichuan Province, Neijiang, China

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

    Fusarium head blight (FHB) has a large influence on both the yield and quality of wheat grain worldwide. Host resistance is the most effective method for controlling FHB, but unfortunately, very few genetic resources on FHB resistance are available; therefore, identifying novel resistance genes or quantitative trait loci (QTLs) is valuable. Here, a recombinant inbred line (RIL) population containing 451 lines derived from the cross L661/PI672538 was sown in four different environments (2019CZ a , 2019CZ b , 2021QL and 2021WJ), and five QTLs, consisting of two previously reported QTLs (FhbL693a and FhbL693b) and three new QTLs (FhbL693c, FhbL693d and FhbL693e), were identified. Further investigation revealed that FhbL693b, FhbL693c and FhbL693d could be detected in all four environments, and FhbL693a and FhbL693e were detected only in 2019CZ b and 2021WJ, respectively. Among the QTLs, the greatest contribution (10.5%) to the phenotypic variation effect (PVE) was FhbL693d in 2021WJ, while the smallest (1.2%) was FhbL693e and FhbL693a in 2019CZ b . The selection of 5Dindel-4 for FhbL693d, 4Aindel-7 for FhbL693c and 3Bindel-24 for FhbL693b decreased the number of damaged spikelets by 2.1, and a new line resistant to FHB named H140-2 was developed by marker-assisted selection (MAS). These results could help to further improve FHB resistance in the future.

    Keywords: wheat, FHB, QTL mapping, BSA-seq, PI672538

    Received: 02 Apr 2024; Accepted: 04 Jul 2024.

    Copyright: © 2024 Huang, Li, Li, Zhong, Li, Yang, Tan, Ren, Li and Suizhuang. 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:
    Qianglan Huang, Southwest University of Science and Technology, Mianyang, China
    Yang Suizhuang, Southwest University of Science and Technology, Mianyang, 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.