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<p>The greatest challenges to durum wheat cultivation in North African countries are Septoria tritici blotch (STB), tan spot (TS), and yellow rust (Yr). These diseases severely affect wheat production and cause considerable yield losses of up to 50% under favourable conditions. In this context, our work aims to identify potential new sources of resistance to these pathogens using a collection of 517 durum wheat landrace accessions from Tunisia, Algeria and Morocco. These accessions were screened under field conditions in Tunisia for resistance to STB during three cropping seasons and to TS and Yr in two locations during two cropping seasons. Our results showed that 158 (30.5%), 3 (0.6%) and 14 (2.7%) accessions were resistant (HR-R) to STB, TS and Yr, respectively. Interestingly 43 (27%) and 5 (35.7%) accessions showed an immune reaction to STB and Yr, respectively. Furthermore, five accessions exhibited combined resistance to both STB and Yr, while two accessions were resistant to STB and TS. These results allowed us to identify potential accessions with high levels of resistance to either individual or multiple leaf diseases that could be exploited in future breeding programs.</p>

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Identification of novel sources of resistance to Septoria tritici blotch, tan spot, and yellow rust in North African durum wheat landraces under field conditions

  • 期刊论文

  • 发表日期：

    2026年6月15日

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  • Sahbi Ferjaoui,
  • Cyrine Robbana,
  • Sarra Ghazouani,
  • Abdennour Sebei,
  • Karima Belguesmi,
  • Sonia Hamza

摘要

The greatest challenges to durum wheat cultivation in North African countries are Septoria tritici blotch (STB), tan spot (TS), and yellow rust (Yr). These diseases severely affect wheat production and cause considerable yield losses of up to 50% under favourable conditions. In this context, our work aims to identify potential new sources of resistance to these pathogens using a collection of 517 durum wheat landrace accessions from Tunisia, Algeria and Morocco. These accessions were screened under field conditions in Tunisia for resistance to STB during three cropping seasons and to TS and Yr in two locations during two cropping seasons. Our results showed that 158 (30.5%), 3 (0.6%) and 14 (2.7%) accessions were resistant (HR-R) to STB, TS and Yr, respectively. Interestingly 43 (27%) and 5 (35.7%) accessions showed an immune reaction to STB and Yr, respectively. Furthermore, five accessions exhibited combined resistance to both STB and Yr, while two accessions were resistant to STB and TS. These results allowed us to identify potential accessions with high levels of resistance to either individual or multiple leaf diseases that could be exploited in future breeding programs.