Cowpea speed breeding using regulated growth chamber conditions and seeds of oven-dried immature pods potentially accommodates eight generations per year

Table 1 Description of growth chambers and plant cultivation conditions. Photoperiod was 10 h light in all chambers

Chamber Description	LED (−)	LED (+)	Metal halide A (−)	Metal halide B (−)	Metal halide C (−)
Internal dimensions (H × L × B) cm	107 × 63 × 53	107 × 63 × 53	198 × 258 × 166	198 × 258 × 166	198 × 258 × 166
Light source and intensity (µmolm⁻² s⁻¹)	White LED; 230	White LED; 230	Metal halide; 700	Metal halide; 700	Metal halide; 420
Temperature (^oC, day/night)	29/23	29/23	29/23	29/23	25/22
Relative humidity for germination and plant growth (%, day/night)	60/70	60/70	60/70	60/70	60/70
Relative humidity for hand pollination (%, day/night)	70/80	70/80	70/80	60/70	70/80

LED, light-emitting diode; (−), no CO₂ supplementation; (+), CO₂ supplemented. Two each of LED (−) and LED (+) chambers were used in the study

ISSN: 1746-4811