Partial acquisition shifts and trait variation drive modular resource-use differentiation in naked oat.

Modern naked oat cultivars show an 87.9% increase in yield primarily driven by higher harvest index, while maintaining a stable resource-use strategy across diverse conditions.

• Why it matters: Understanding how breeding influences plant resource strategies is crucial for developing resilient crops capable of thriving in variable climates and marginal lands, yet the applicability of the plant economics spectrum to crops remains uncertain.
• What they did: The study compared four traditional landraces and four modern cultivars in field experiments over two growing seasons, analyzing traits such as leaf nitrogen, phosphorus ratios, and yield components to assess shifts in resource-use strategies.
• The result: Findings reveal that breeding selectively enhanced specific acquisitive traits without altering the overall resource-use spectrum, suggesting a strategic balance between yield gains and conserved stress-resilience traits that supports sustainable crop improvement.