Table 1.
Details of genotype-specific GECROS model input parameters classified into three categories
| Parameters | Description | Unit |
|---|---|---|
| (A) Phenological | ||
| m V | Pre-flowering period | Thermal day |
| m R | Post-flowering period | Thermal day |
| δ | Photoperiod sensitivity | h–1 |
| (B) Morphological | ||
| H max | Maximum plant height | m |
| S w | Single-grain weight | g |
| (C) Physiological | ||
| g set | Baseline grain set | % |
| n so | Grain nitrogen concentration | g N g–1 DM |
| N max | Total crop nitrogen uptake at maturity | g N m–2 |
‘Thermal day’ is calculated using the bell-shaped temperature response equation as used in GECROS, based on hourly temperatures generated from weather data on daily maximum and minimum temperatures; a thermal day is equivalent to an actual day only if temperature at each hour of the day equals the optimum temperature for phenological development. So, mV and mR in thermal days are lower than their values in actual days for expressing the growth duration. DM=dry matter; N=nitrogen.