Genetics of Disease Resistance in Wheat

A special issue of Genes (ISSN 2073-4425). This special issue belongs to the section "Plant Genetics and Genomics".

Deadline for manuscript submissions: 30 November 2024 | Viewed by 1782

Special Issue Editor


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Guest Editor
College of Plant Protection, Hebei Agricultural University, Baoding 071000, China
Interests: wheat breeding; plant pathology; molecular biology

Special Issue Information

Dear Colleagues,

Wheat is one of the most important staple food crops providing most of the human population’s caloric intake. Consequently, wheat yield and production affect the global economy. Likewise, in other crop plants, wheat is in a continual evolutionary arms race with its coevolving pathogens. The production of wheat throughout the world has been significantly reduced because of either biotic and/or abiotic factors. Historically, devastating pathogens endure producing new virulent strains that overcome past sources of resistance. Developing resistant cultivars is the most economically and environmentally feasible strategy for controlling diseases of wheat (biotic factors).

Advanced genetics studies of disease resistance have been used to detect pathogen resistance genes (R-genes). Despite the large genome size, complexity and very high proportions of relatively long near-identical repeats of wheat, geneticists and breeders continuously strive to develop improved varieties by fine-tuning genetically complex yield and end-use quality parameters in maintaining stable yields. The large and redundant nature of wheat’s hexaploid genome makes it a good candidate for studying R-gene evolution with respect to recent polyploidization events. Wheat geneticists and breeders still need more investigations to understand the wheat biology and the molecular basis for agronomic traits. To meet the demand of the world population, continuous research work on the genetics of disease resistance in wheat is important in accelerating wheat genetic gain and increasing yield and maintaining quality traits by ensuring genetic diversity.

Prof. Dr. Zaifeng Li
Guest Editor

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Keywords

  • wheat
  • genetics
  • pathogens
  • R-genes
  • disease resistance
  • genetic gain

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Published Papers (1 paper)

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Research

13 pages, 2799 KiB  
Article
Screening of CIMMYT and South Asian Bread Wheat Germplasm Reveals Marker–Trait Associations for Seedling Resistance to Septoria Nodorum Blotch
by Rupsanatan Mandal, Xinyao He, Gyanendra Singh, Muhammad Rezaul Kabir, Arun Kumar Joshi and Pawan Kumar Singh
Genes 2024, 15(7), 890; https://doi.org/10.3390/genes15070890 - 7 Jul 2024
Viewed by 1254
Abstract
Wheat (Triticum aestivum L.) production is adversely impacted by Septoria nodorum blotch (SNB), a fungal disease caused by Parastagonospora nodorum. Wheat breeders are constantly up against this biotic challenge as they try to create resistant cultivars. The genome-wide association study (GWAS) [...] Read more.
Wheat (Triticum aestivum L.) production is adversely impacted by Septoria nodorum blotch (SNB), a fungal disease caused by Parastagonospora nodorum. Wheat breeders are constantly up against this biotic challenge as they try to create resistant cultivars. The genome-wide association study (GWAS) has become an efficient tool for identifying molecular markers linked with SNB resistance. This technique is used to acquire an understanding of the genetic basis of resistance and to facilitate marker-assisted selection. In the current study, a total of 174 bread wheat accessions from South Asia and CIMMYT were assessed for SNB reactions at the seedling stage in three greenhouse experiments at CIMMYT, Mexico. The results indicated that 129 genotypes were resistant to SNB, 39 were moderately resistant, and only 6 were moderately susceptible. The Genotyping Illumina Infinium 15K Bead Chip was used, and 11,184 SNP markers were utilized to identify marker–trait associations (MTAs) after filtering. Multiple tests confirmed the existence of significant MTAs on chromosomes 5B, 5A, and 3D, and the ones at Tsn1 on 5B were the most stable and conferred the highest phenotypic variation. The resistant genotypes identified in this study could be cultivated in South Asian countries as a preventative measure against the spread of SNB. This work also identified molecular markers of SNB resistance that could be used in future wheat breeding projects. Full article
(This article belongs to the Special Issue Genetics of Disease Resistance in Wheat)
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