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

Autor:	Mourad AMI; Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Seeland, OT Gatersleben, Germany.; Department of Agronomy, Faculty of Agriculture, Assiut University, Assiut, Egypt., Hamdy RM; Food Science and Technology Department, Faculty of Agriculture, Assiut University, Assiut, Egypt., Esmail SM; Wheat Disease Research Department, Plant Pathology Research Institute, Agricultural Research Center, Giza, Egypt.
Jazyk:	angličtina
Zdroj:	Frontiers in plant science [Front Plant Sci] 2023 May 10; Vol. 14, pp. 1160657. Date of Electronic Publication: 2023 May 10 (Print Publication: 2023).
DOI:	10.3389/fpls.2023.1160657
Abstrakt:	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. Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (Copyright © 2023 Mourad, Hamdy and Esmail.)
Databáze:	MEDLINE
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