Pleiotropic Quantitative Trait Loci (QTL) Mining for Regulating Wheat Processing Quality- and Yield-Related Traits

Area of Science:

• Agricultural Science
• Genetics
• Plant Breeding

Background:

• Bread wheat (Triticum aestivum L.) quality and yield are complex traits.
• Understanding the genetic basis is crucial for crop improvement.

Purpose of the Study:

• To identify quantitative trait loci (QTL) for processing quality and yield traits in bread wheat.
• To discover novel genetic markers for marker-assisted breeding.

Main Methods:

• Genome-wide association studies (GWAS) were performed on 285 regional test lines.
• Analysis identified 87 QTL for traits including water absorption, gluten content, protein content, dough stability time, extension area, maximum resistance, thousand-grain weight, grain length, and grain width.
• 188 significant single-nucleotide polymorphisms (SNPs) were identified, with 25 showing associations with multiple traits.

Main Results:

• Eighty-seven QTL were identified, including many novel QTL for processing quality and yield traits.
• Several SNPs exhibited pleiotropic effects, influencing multiple traits simultaneously.
• Eighteen rare superior alleles were identified in the surveyed accessions.

Conclusions:

• This study identified significant QTL associated with quality and yield traits in wheat, some with pleiotropic effects.
• The findings provide valuable genetic resources for molecular designs aimed at improving both wheat quality and yield.
• This research facilitates synergistic improvements in bread wheat through advanced breeding strategies.