BRS A504 CL is a new rice cultivar, resistant to herbicides from the imidazolinone chemical group, developed for the Clearfield Production System for upland rice in Brazil. The cultivar has excellent grain quality and yield potential of 8,188 kg ha-1.
Keywords:
Oryza sativa L.; imidazolinone chemical group; grain yield; genetic improvement; clearfield production system
| Agronomic Traits | BRS A504 CL | BRS A501 CL | BRS Esmeralda | AN Cambará |
|---|---|---|---|---|
| Days to flowering (days) | 74 | 75 | 74 | 74 |
| Plant height (cm) | 104 | 111 | 109 | 107 |
| Plant lodging1 | 1.40 | 2.10 | 1.70 | 1.60 |
| Rice blast (leaf)2 | 1.60 | 1.70 | 1.70 | 1.90 |
| Rice blast (neck) 2 | 2.20 | 2.20 | 2.10 | 3.00 |
| Rice brown spot2 | 2.70 | 2.60 | 2.50 | 2.50 |
| Rice scald2 | 2.60 | 3.00 | 2.70 | 3.00 |
| Rice grain spot2 | 2.40 | 2.40 | 2.20 | 2.40 |
| National blast nursery scores3 | 3.30 | 2.50 | 3.20 | 3.60 |
| Grain quality traits | ||||
| Whole grains (%) | 65 | - | 62 | 66 |
| Grain length (cm) | 6.78 | - | 6.76 | 6.42 |
| Grain width (cm) | 1.87 | - | 1.88 | 1.82 |
| Grain length/width ratio | 3.62 | - | 3.60 | 3.53 |
| Grain chalkiness area (%) | 2.87 | - | 3.09 | 0.68 |
| Grains w/chalkiness (%) | 11.80 | - | 13.30 | 7.90 |
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