Virulence analysis of wheat powdery mildew races during 2019–2020 seasons in Egypt

El-Shamy, M. M.; Mohamed, Mona A.

doi:10.1007/s42976-021-00156-y

Cited by 2 publications

(6 citation statements)

References 18 publications

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“…tritici is a serious disease that causes huge damage to wheat yield. Most Egyptian bread wheat cultivars were reported to be moderately resistant or susceptible to PM ( El-Shamy et al., 2016 ; Abdelrhim et al., 2018 ; Draz et al., 2019 ; El-Shamy and Mohamed, 2022 ). Therefore, looking for new sources of resistance is urgently needed.…”

Section: Discussionmentioning

confidence: 99%

“…These populations were reported to contain different isolates (Dr. Samar Esmail, personal communications). Recent studies reported the existence of different Bgt isolate in each growing season in the Egyptian fields ( El-Shamy and Mohamed, 2022 ). Therefore, diverse Bgt isolates were supposed to be used in the current evaluations.…”

Section: Discussionmentioning

confidence: 99%

“…Such changes in the resistance shed light on the changes that occurred in Bgt isolates during the different growing seasons. The eight immune/resistant isolines were reported previously to be resistant under Egyptian conditions ( El-Shamy et al., 2016 ; Abdelrhim et al., 2018 ; El-Shamy and Mohamed, 2022 ). Some isolines showed different resistant responses in the two experiments confirming the presence of different Bgt isolates in each evaluation.…”

Section: Discussionmentioning

confidence: 99%

“…In favorable conditions, PM infection could cause yield losses of up to 62% in many wheat planting areas ( Costamilan, 2005 ; Maxwell et al., 2009 ; El-Shamy et al., 2012 ; Huang et al., 2013 ). Recently, PM was reported to occur annually in Egyptian fields and is considered more dangerous than rusts that have been effectively controlled ( El-Shamy and Mohamed, 2022 ). Few efforts have been made to control such a serious disease in Egyptian fields.…”

Section: Introductionmentioning

confidence: 99%

“…Some studies tested the presence of specific Pm genes in the Egyptian wheat germplasm ( Emara et al., 2016 ; Elsayed and Elkot, 2020 ; Draz et al., 2022 ). Others figured out the different Bgt isolates exist in the Egyptian Bgt populations ( El-Shamy et al., 2012 ; El-Shamy and Mohamed, 2022 ). However, a deep understanding of the genetic control of PM resistance will help wheat breeders to produce highly resistant genotypes.…”

Section: Introductionmentioning

confidence: 99%

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Novel genomic regions on chromosome 5B controlling wheat powdery mildew seedling resistance under Egyptian conditions

2023

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Wheat powdery mildew (PM) causes significant yield losses worldwide. None of the Egyptian wheat cultivars was detected to be highly resistant to such a severe disease. Therefore, a diverse spring wheat panel was evaluated for PM seedling resistance using different Bgt conidiospores collected from Egyptian fields in two growing seasons. The evaluation was done in two separate experiments. Highly significant differences were found between the two experiments suggesting the presence of different isolates populations. Highly significant differences were found among the tested genotypes confirming the ability to improve PM resistance using the recent panel. Genome-wide association study (GWAS) was done for each experiment separately and a total of 71 significant markers located within 36 gene models were identified. The majority of these markers are located on chromosome 5B. Haplotype block analysis identified seven blocks containing the significant markers on chromosome 5B. Five gene models were identified on the short arm of the chromosome. Gene enrichment analysis identified five and seven pathways based on the biological process and molecular functions respectively for the detected gene models. All these pathways are associated with disease resistance in wheat. The genomic regions on 5B seem to be novel regions that are associated with PM resistance under Egyptian conditions. Selection of superior genotypes was done and Grecian genotypes seem to be a good source for improving PM resistance under Egyptian conditions.

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