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Related Experiment Video

Updated: Jun 11, 2026

Purification of High Molecular Weight Genomic DNA from Powdery Mildew for Long-Read Sequencing
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Genome-Wide Characterization Highlights Key Roles for Bread Wheat MLO Genes in Powdery Mildew and Abiotic Stresses.

Babar Hussain1, Qasim Raza2,3, Hamza Ramzan4,5

  • 1Department of Biotechnology, Faculty of Science and Technology, University of Central Punjab, Lahore, Pakistan.

Rice (New York, N.Y.)
|October 3, 2025
PubMed
Summary

Scientists identified 47 Mildew Locus O (MLO) genes in wheat, discovering key genetic diversity for enhancing powdery mildew resistance. This research aids in developing climate-resilient wheat cultivars for sustainable agriculture.

Keywords:
Climate resilienceDisease resistanceGenomic diversityMildew locus OMulti-Omics

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Area of Science:

  • Plant genetics
  • Molecular biology
  • Agricultural science

Background:

  • Powdery mildew (PM) is a major global threat to wheat production.
  • Limited cloned genes and a shortage of Mildew Locus O (MLO) genes hinder durable PM resistance development in wheat breeding.

Purpose of the Study:

  • To comprehensively identify and characterize MLO genes in wheat using the latest genome data.
  • To explore the phylogenetic relationships, evolutionary mechanisms, and expression patterns of wheat MLO genes.
  • To identify potential MLO candidates for enhancing PM resistance in wheat breeding programs.

Main Methods:

  • Genome-wide search using wheat reference genome data.
  • Phylogenetic analysis with model plants, gene structure, and motif distribution analysis.
  • In-silico expression analysis and quantitative real-time polymerase chain reaction (qRT-PCR) validation.

Main Results:

  • Identified and characterized 47 wheat MLO genes distributed across 21 chromosomes.
  • Classified wheat MLOs into four clades (I-IV) supported by gene structure and motif distribution.
  • Highlighted 10 MLO genes with overlapping expression patterns under various conditions, validated by qRT-PCR in resistant and susceptible genotypes.

Conclusions:

  • The identified wheat MLO genes represent a valuable resource for engineering durable, broad-spectrum resistance against stresses, particularly PM.
  • These MLO genes offer untapped genetic diversity for improving wheat cultivars against biotic and abiotic stresses.
  • This study provides a compendium of wheat MLO genes for functional characterization and exploitation in climate-resilient wheat breeding for sustainable production.