Description and Management Guidelines
Authors
C.W. Johnson, plant breeder, Rice Experiment Station, Biggs, CA
Introduction
M-206 is a very to early maturing, semi-dwarf, glabrous, Calrose quality Medium-grain. It was developed by CCRRF at the Rice Experiment Station (RES) and released to growers in 2005. It is resistant to the current race of blast found in California
Table 1. Summary of Agronomic Characteristics for
M-202 and M-207
2003 to 2004
|
M-202 |
M-207 | |||
| 2003 | 2004 | 2003 | 2004 | |
| Grain Dimensions (Paddy) | ||||
| Average Length (mm) | 8.5 | 8.3 | 8.7 | 8.6 |
| Average Width (mm) | 3.3 | 3.4 | 3.0 | 3.1 |
| L/W Ratio | 2.6 | 2.5 | 2.9 | 2.7 |
| Grain Dimensions (Brown) | ||||
| Average Length (mm) | 6.2 | 6.0 | 6.4 | 6.3 |
| Average Width (mm) | 2.9 | 2.9 | 2.7 | 2.7 |
| L/W Ratio | 2.2 | 2.1 | 2.47 | 2.3 |
| 1000 Grain Weight (g) | 24.5 | 23.0 | 22.1 | 21.6 |
| Grain Dimensions (Milled) | ||||
| Average Length (mm) | 5.8 | 5.7 | 6.0 | 5.8 |
| Average Width (mm) | 2.8 | 2.9 | 2.5 | 2.6 |
| L/W Ratio | 2.1 | 2.0 | 2.4 | 2.2 |
| Apparent Amylose (%) | 16.9 | 15.8 | 16.0 | 15.5 |
| Protein (%) | ||||
| Brown | 5.7 | - | 6.9 | - |
| Milled | 4.9 | 4.9 | 5.9 | 6.2 |
| Alkali Spreading Value (1.5% KOH) | 6.0 | 6.0 | 6.0 | 6.0 |
| Alkali Spreading Value (1.7% KOH) | 7.0 | 7.0 | 7.0 | 7.0 |
| Cooking Time (min.) | 19.4 | 18.7 | 18.1 | 17.8 |
| Rapid Visco Analyzer | ||||
| AACC Method | ||||
| Peak | 279 | 315 | 297 | 301 |
| Hot Paste | 156 | 148 | 194 | 173 |
| Cool Paste | 255 | 240 | 298 | 272 |
| Setback | -24 | -74 | 1 | -29 |
| Consistency | 99 | 92 | 104 | 99 |
| Breakdown | 123 | 167 | 103 | 128 |
| Pasting Temp. (°C) | 71.2 | 71.1 | 74.5 | 73.6 |