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Phenotyping mediterranean durum wheat landraces for resistance to Zymoseptoria tritici in Tunisia

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Title Phenotyping mediterranean durum wheat landraces for resistance to Zymoseptoria tritici in Tunisia
 
Creator Ben M’Barek, Sarrah
Laribi, Marwa
Kouki, Hajer
Castillo, Dalma
Araar, Chayma
Nefzaoui, Meriem
Ammar, Karim
Saint Pierre, Carolina
Yahyaoui, Amor Hassine
 
Subject agronomic characters
hard wheat
seedlings
 
Description Durum wheat landraces have huge potential for the identification of genetic factors valuable for improving resistance to biotic stresses. Tunisia is known as a hot spot for Septoria tritici blotch disease (STB), caused by the fungus Zymoseptoria tritici (Z. tritici). In this context, a collection of 3166 Mediterranean durum wheat landraces were evaluated at the seedling and adult stages for STB resistance in the 2016–2017 cropping season under field conditions in Kodia (Tunisia). Unadapted/susceptible accessions were eliminated to reach the final set of 1059 accessions; this was termed the Med-collection, which comprised accessions from 13 countries and was also screened in the 2018–2019 cropping season. The Med-collection showed high frequency of resistance reactions, among which over 50% showed an immune reaction (HR) at both seedling and adult growth stages. Interestingly, 92% of HR and R accessions maintained their resistance levels across the two years, confirming the highly significant correlation found between seedling-and adult-stage reactions. Plant Height was found to have a negative significant effect on adult-stage resistance, suggesting that either this trait can influence disease severity, or that it can be due to environmental/epidemiological factors. Accessions from Italy showed the highest variability, while those from Portugal, Spain and Tunisia showed the highest levels of resistance at both growth stages, suggesting that the latter accessions may harbor novel QTLs effective for STB resistance.
 
Date 2022
2023-01-04T10:21:43Z
2023-01-04T10:21:43Z
 
Type Journal Article
 
Identifier Ben M’Barek, S., Laribi, M., Kouki, H., Castillo, D., Araar, C., Nefzaoui, M., Ammar, K., Saint-Pierre, C., & Yahyaoui, A. H. (2022). Phenotyping mediterranean durum wheat landraces for resistance to zymoseptoria tritici in tunisia. Genes, 13(2), 355. https://hdl.handle.net/10883/22011
2073-4425
https://hdl.handle.net/10568/126540
https://hdl.handle.net/10883/22011
https://doi.org/10.3390/genes13020355
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format application/pdf
 
Publisher MDPI AG
 
Source Genes