Genetic architecture of rust resistance in a wheat (Triticum turgidum) diversity panel

Valentyna Klymiuk, Teketel Haile, Jennifer Ens, Krystalee Wiebe, Amidou N’Diaye, Andrii Fatiukha, Tamar Krugman, Roi Ben-David, Sariel Hübner, Sylvie Cloutier, Curtis J. Pozniak

Research output: Contribution to journalArticlepeer-review

Abstract

Introduction: Wheat rust diseases are widespread and affect all wheat growing areas around the globe. Breeding strategies focus on incorporating genetic disease resistance. However, pathogens can quickly evolve and overcome the resistance genes deployed in commercial cultivars, creating a constant need for identifying new sources of resistance. Methods: We have assembled a diverse tetraploid wheat panel comprised of 447 accessions of three Triticum turgidum subspecies and performed a genome-wide association study (GWAS) for resistance to wheat stem, stripe, and leaf rusts. The panel was genotyped with the 90K Wheat iSelect single nucleotide polymorphism (SNP) array and subsequent filtering resulted in a set of 6,410 non-redundant SNP markers with known physical positions. Results: Population structure and phylogenetic analyses revealed that the diversity panel could be divided into three subpopulations based on phylogenetic/geographic relatedness. Marker-trait associations (MTAs) were detected for two stem rust, two stripe rust and one leaf rust resistance loci. Of them, three MTAs coincide with the known rust resistance genes Sr13, Yr15 and Yr67, while the other two may harbor undescribed resistance genes. Discussion: The tetraploid wheat diversity panel, developed and characterized herein, captures wide geographic origins, genetic diversity, and evolutionary history since domestication making it a useful community resource for mapping of other agronomically important traits and for conducting evolutionary studies.

Original languageEnglish
Article number1145371
JournalFrontiers in Plant Science
Volume14
DOIs
StatePublished - 2023

Bibliographical note

Publisher Copyright:
Copyright © 2023 Klymiuk, Haile, Ens, Wiebe, N’Diaye, Fatiukha, Krugman, Ben-David, Hübner, Cloutier and Pozniak.

Keywords

  • diversity panel
  • GWAS
  • leaf rust
  • Sr13
  • stem rust
  • stripe rust
  • wheat
  • Yr15

ASJC Scopus subject areas

  • Plant Science

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