QTL Mapping of Stem Rust Resistance in Populations of Durum Wheat

Daniela Marone, Elisabetta Mazzucotelli, Oadi Matny, Francesca Desiderio, Giuseppe Sciara, Marco Maccaferri, Ilaria Marcotuli, Agata Gadaleta, Brian Steffenson, Anna Maria Mastrangelo

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Stem rinfectionust, caused by the fungus Puccinia graminis f. sp. tritici (Pgt), is one of the most devastating fungal diseases of durum and common wheat worldwide. The identification of sources of resistance and the validation of QTLs identified through genome-wide association studies is of paramount importance for reducing the losses caused by this disease to wheat grain yield and quality. Four segregating populations whose parents showed contrasting reactions to some Pgt races were assessed in the present study, and 14 QTLs were identified on chromosomes 3A, 4A, 6A, and 6B, with some regions in common between different segregating populations. Several QTLs were mapped to chromosomal regions coincident with previously mapped stem rust resistance loci; however, their reaction to different Pgt races suggest that novel genes or alleles could be present on chromosomes 3A and 6B. Putative candidate genes with a disease-related functional annotation have been identified in the QTL regions based on information available from the reference genome of durum cv. ‘Svevo’.

Original languageEnglish (US)
Article number1793
Issue number10
StatePublished - Oct 2022

Bibliographical note

Funding Information:
This research was funded by MUR (Ministero dell’Università e della Ricerca), grant “CerealMed”—Enhancing diversity in Mediterranean cereal farming systems, in the frame of PRIMA Section 2—Multi-topic 2019.

Publisher Copyright:
© 2022 by the authors.


  • resistance loci
  • stem rust
  • tetraploid wheat


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