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. 2014 Jul 30;4:5736. doi: 10.1038/srep05736

Table 3. Cultivar parameters and part ecotype parameters for wheat developed for simulation using the DSSAT-CERES-Wheat module.

Parameters Definitions Calibrated values
P1V Days at optimum vernalizing temperature required to complete vernalization 30
P1D Percentage reduction in development rate in a photoperiod 10 hour shorter than the threshold relative to that at the threshold 55
P5 Grain filling (excluding lag) phase duration (°C.d) 490
G1 Kernel number per unit canopy weight at anthesis (#/g) 15
G2 Standard kernel size under optimum conditions (mg) 33
G3 Standard, non-stressed dry weight (total, including grain) of a single tiller at maturity (g) 0.8
PHINT Interval between successive leaf tip appearances (°C.d) 75
HSTD Standard canopy height (cm) 95
LAWR2 Lamina area to weight ratio, phase 2 (cm2/g) 140
LAWRS Lamina area to weight ratio of standard first leaf (cm2/g) 200
P1 Duration of phase end juvenile to double ridges (PVTU) 240
P1DPE Day length factor, pre emergence (#,0–1) 0.0
P2 Duration of phase double ridges to end leaf growth (TU) 180
P3 Duration of phase end leaf growth to end spike growth (TU) 160
P4 Duration of phase end spike growth to end grain fill lag (TU) 400
P4SGE Stem growth end stage (Growth Stage) 4.45
TBGF Temperature base, grain filling (°C) 0.0
PARUR PAR conversion to dry material ratio, after last leaf stage (g/MJ) 2.5
PARUV PAR conversion to dry material ratio, before last leaf stage (g/MJ) 2.2
WFGU Water stress factor, growth, upper (fr) 1.0
WFPGU Water factor, genotype sensitivity to stress when grain filling (0–1) 0.8
WFPU Water stress factor, photosynthesis, upper (fr) 1.0