Enhanced Activity of Glutamine Synthetase by Manipulating a GWAS-Identified BnaA02.GLN1;2 Gene Augments Nitrate Uptake and Yield in Brassica napus.
- Open access
Manipulating the BnaA02.GLN1;2 gene increases glutamine synthetase activity, boosting nitrate uptake and seed yield in Brassica napus by up to nearly double under high nitrogen conditions.
- Why it matters: Improving nitrogen use efficiency in oilseed rape is crucial for sustainable agriculture, reducing fertilizer input while maintaining high yields, but the genetic mechanisms behind this are not fully understood.
- What they did: The study screened 505 accessions, identified a key gene BnaA02.GLN1;2 through GWAS, and demonstrated that overexpressing this gene enhances nitrate assimilation, seed production, and reduces undesirable seed compounds.
- The result: This work reveals BnaA02.GLN1;2 as a promising breeding target for high-yield, low-input rapeseed varieties, enabling better nitrogen management and crop productivity.