Integrated GWAS and Functional Analyses Reveal a Multi-Layer Regulatory Network Orchestrating Spermidine Homeostasis and Stress Tolerance in Soybean ( Glycine max (L.) Merr.)
Spermidine (Spd) is a pivotal polyamine involved in plant growth and stress tolerance, but its genetic regulation in soybeans (Glycine max) remains unclear. In this study, we quantified seed Spd content in 208 soybean accessions across two years by RP-HPLC and performed GWAS. Spd showed continuous variation and a hig...