Application of Genomics Tools in Wheat Breeding to Attain Durable Rust Resistance

Area of Science:

• Plant Pathology
• Agricultural Genomics
• Crop Science

Background:

• Wheat is a global staple, crucial for food and calories, but vulnerable to diseases.
• Wheat rust diseases, caused by *Puccinia* species, are major threats leading to significant yield losses and food insecurity.
• Pathogen evolution and virulence shifts render current resistance genes ineffective, necessitating new strategies.

Purpose of the Study:

• To review evolutionary trends of wheat rust pathogens and contemporary varieties.
• To highlight research strategies for controlling *Puccinia* rust diseases in wheat.
• To emphasize the impact of next-generation sequencing (NGS) and genetic resistance in wheat breeding.

Main Methods:

• Review of literature on wheat rust evolution, genomics, and breeding strategies.
• Analysis of next-generation sequencing (NGS) applications in wheat genomics.
• Discussion of genome-wide association studies (GWAS), quantitative trait locus (QTL) mapping, and KASP assays.

Main Results:

• Advances in NGS and bioinformatics have revolutionized wheat genomics, enabling marker-trait association and gene discovery.
• High-throughput genotyping aids in genetic diversity estimation, genetic map construction, and trait dissection.
• Cost-effective NGS technologies and cloning of rust resistance genes are crucial for developing resistant wheat varieties.

Conclusions:

• Identifying and deploying diverse rust-resistant genes is essential for durable wheat resistance.
• Integrated strategies combining genetic resistance and advanced genomic tools are vital for combating wheat rust.
• The availability of wheat reference genomes accelerates the cloning and deployment of resistance genes.