Variable name Definition Unit Calculation
Amax Flag leaf light & CO2 saturated photosynthesis μmol m−2 s-1 n.a.
Amax variation Rel. Amax (e-CO2/ambient) unitless Amax (e-CO2) / Amax (ambient)
Yield Grain yield g plant-1
Yield variation Rel. yield (e-CO2 / ambient) unitless Yield (e-CO2) / yield (ambient)
ETR Electron transport rate μmol mol−1 s-1 ETR = φPSII × PAR × 0.84 × 0.5
Leaf area Flag leaf area cm² Leaf area * Leaf width * 0.725
Leaf length Flag leaf length cm n.a.
Leaf width Flag leaf width cm n.a.
Leaf sucrose Flag leaf [sucrose] mg g-1 n.a.
Leaf starch Flag leaf [starch] mg g-1 n.a.
Panicle spikelet nb Spikelets nb per panicle unitless n.a.
Panicle sink potential Product of spikelet nb & filled grain weight g Panicle spikelet nb * 1000 grain wt
SLA Specific leaf area cm² g-1 Flag leaf area / dry weight
SPAD Flag leaf areal chlorophyll content unitless n.a.
1000 grain wt Dry wt of 1000 filled grains g n.a.
Tiller nb max Tiller nb/plant unitless n.a.
Tot. shoot dry matter Aboveground dw at maturity g plant-1 n.a.
Proxy traits:
LSSR Local source-sink ratio unitless Flag leaf area / Panicle spikelet nb
LSSRsink LSSR based on sink potential unitless Flag leaf area / (Panicle spikelet nb * 1000 grain wt)
LSSRsink*SPAD unitless (Flag leaf area * SPAD) / (Panicle spikelet nb * 1000 grain wt)