Stem rust appraisal of local and global wheat germplasm with a new virulence threat to resistance genes

Abou-Zeid, Mohamed A.; Mabrouk, Ola; Draz, Ibrahim Sobhy; Saad-El-Din, Heba I.; Safhi, Fatmah Ahmed; ALshamrani, Salha M.; Esmail, Samar M.

doi:10.1007/s13313-022-00891-8

Cited by 3 publications

(1 citation statement)

References 49 publications

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“…Nevertheless, all three resistance genes, namely Sr22 , Sr26 , and Sr50 , remain effective against TTKSK (Ug99) and its derivatives ( Singh et al, 2011 ). Abou-Zeid et al (2023) stated that the resistance genes Sr22 , Sr25 , Sr26 , and Sr50 may currently be the most helpful race-specific resistance genes, depending on how they are used in combination. Most previous studies on this subject have been carried out by various researchers who have identified the frequency of different Sr resistance genes in wheat varieties from different countries ( Baranova et al, 2023 ; Kelbin et al, 2022 ; Li et al, 2016 ; Lin et al, 2021 ; Xu et al, 2018 , 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of genetic variation and host resistance to wheat stem rust pathogen (Puccinia graminis f. sp. tritici) in bread wheat (Triticum aestivum L.) varieties grown in Türkiye

Cat

2024

PeerJ

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Wheat stem rust, which is caused by Puccinia graminis f. sp. tritici (Pgt), is a highly destructive disease that affects wheat crops on a global scale. In this study, the reactions of 150 bread wheat varieties were evaluated for natural Pgt infection at the adult-plant stage in the 2019–2020 and 2020–2021 growing seasons, and they were analyzed using specific molecular markers to detect stem rust resistance genes (Sr22, Sr24, Sr25, Sr26, Sr31, Sr38, Sr50, and Sr57). Based on phenotypic data, the majority of the varieties (62%) were resistant or moderately resistant to natural Pgt infection. According to molecular results, it was identified that Sr57 was present in 103 varieties, Sr50 in nine varieties, Sr25 in six varieties, and Sr22, Sr31, and Sr38 in one variety each. Additionally, their combinations Sr25 + Sr50, Sr31 + Sr57, Sr38 + Sr50, and Sr38 + Sr57 were detected in these varieties. On the other hand, Sr24 and Sr26 were not identified. In addition, many varieties had low stem rust scores, including a large minority that lacked Sr57. These varieties must have useful resistance to stem rust and could be the basis for selecting greater, possibly durable resistance.

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Section: Introductionmentioning

confidence: 99%

Evaluation of genetic variation and host resistance to wheat stem rust pathogen (Puccinia graminis f. sp. tritici) in bread wheat (Triticum aestivum L.) varieties grown in Türkiye

Cat

2024

PeerJ

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Phenotypic and molecular characterization of pleiotropic resistance to rusts and powdery mildew in spring wheat

Draz,

Esmail,

Komeil

2024

Euphytica

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An attempt was undertaken to comprehend how phenotypic markers, leaf tip necrosis (LTN), and pseudo black chaff (PBC), are associated with pleiotropic resistance genes in wheat (Triticum spp.). Pleiotropic resistance to stripe rust (Puccinia striiformis f. sp. tritici), leaf rust (P. triticina), stem rust (P. graminis f. sp. tritici) and powdery mildew (Blumeria graminis f. sp. tritici) was evaluated in 57 Egyptian spring wheat cultivars at seedling stage in greenhouse and at adult plant stage in field during 2021/22 and 2022/23. At seedling stage, pleiotropic resistance rated moderately resistance (MR) was observed in five cultivars, Misr-3 (all three rusts), Misr-4 (stripe rust, leaf rust, powdery mildew), Giza-168 (leaf rust, stem rust, powdery mildew), Sakha-94 and Sids-13 (leaf rust, stem rust). At adult plant stage, Misr-4 outperformed all other evaluated cultivars, exhibiting a high level of pleiotropic adult plant resistance (PAPR) against all diseases investigated. High levels of PAPR were also noticed against the three rusts in nine cultivars, Misr-3, Sakha-93, Sakha-94, Sakha-95, Giza-156, Giza-168, Giza-171, Gemmeiza-10 and Sids-13, and moderate levels against powdery mildew in Misr-3, Sakha-95, Giza-156. Four PAPR genes were characterized in cultivars based on phenotypic and molecular markers. Phenotypic markers (LTN and PBC) were observed in 23 cultivars. Molecular marker csLV34 indicated the presence of Lr34/Yr18/Sr57/Pm38/Ltn1 in six cultivars, whilst marker Xwmc44 indicated that Lr46/Yr29/Sr58/Pm39/Ltn2 was present in five cultivars. Marker Xcfd71 indicated the presence of Lr67/Yr46/Sr55/Pm46/Ltn3 in 19 cultivars. Gene Sr2/Yr30/Lr27/Pbc was identified with marker csSr2 in three cultivars. A complete association between LTN and molecular markers was recorded, while a strong association (r = 0.73) was recorded between PBC and molecular markers. Findings demonstrated the reliability of phenotypic markers in predicting pleiotropic resistance in wheat, which would facilitate marker-assisted selection in breeding programs.

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Phylogenesis of virulent races of Puccinia graminis f. sp. tritici based on phenotyping and genotyping using newly developed SNP markers for genetic groups in clades

Esmail,

Draz,

El-Naggar

et al. 2024

Physiological and Molecular Plant Pathology

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Stem rust appraisal of local and global wheat germplasm with a new virulence threat to resistance genes

Cited by 3 publications

References 49 publications

Evaluation of genetic variation and host resistance to wheat stem rust pathogen (Puccinia graminis f. sp. tritici) in bread wheat (Triticum aestivum L.) varieties grown in Türkiye

Evaluation of genetic variation and host resistance to wheat stem rust pathogen (Puccinia graminis f. sp. tritici) in bread wheat (Triticum aestivum L.) varieties grown in Türkiye

Phenotypic and molecular characterization of pleiotropic resistance to rusts and powdery mildew in spring wheat

Phylogenesis of virulent races of Puccinia graminis f. sp. tritici based on phenotyping and genotyping using newly developed SNP markers for genetic groups in clades

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