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

Frontiers in Plant Science

Plant Science

Rania M. Hamdy¹  Amira M.I. Mourad²  Samar M. Esmail³ 

[1] Food Science and Technology Department, Faculty of Agriculture, Assiut University, Assiut, Egypt;Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Seeland, OT Gatersleben, Germany;Department of Agronomy, Faculty of Agriculture, Assiut University, Assiut, Egypt;Wheat Disease Research Department, Plant Pathology Research Institute, Agricultural Research Center, Giza, Egypt;

关键词: genome-wide association study;    gene enrichment;    biological process pathway;    functional annotation pathway;    gene network;   

DOI  :  10.3389/fpls.2023.1160657

 received in 2023-02-07, accepted in 2023-03-27,  发布年份 2023

来源: Frontiers

【 摘 要 】

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.

【 授权许可】

Unknown   
Copyright © 2023 Mourad, Hamdy and Esmail