Genetic coefficient parameters | Values | |||
BRRI dhan28 | BRRI dhan29 | BRRI dhan58 | ||
Juvenile phase coefficient (P1), GDDa | 825 | 950 | 850 | |
Photoperiodism coefficient (P2R), GDD h−1 | 150 | 150 | 150 | |
Grain filling duration coefficient (P5), GDD | 425 | 550 | 470 | |
Critical photoperiod (P20), h | 12.6 | 12.8 | 12.7 | |
Spikelet number coefficient (G1) | 50 | 60 | 55 | |
Single grain weight (G2), g | 0.022 | 0.021 | 0.021 | |
Tillering coefficient (G3) | 1.0 | 1.0 | 1.0 | |
Temperature tolerance coefficient (G4) | 1.0 | 1.0 | 1.0 | |