The lowland rice breeding program, developed in Minas Gerais state, has as basic objective to release new commercial cultivars. In this way, this program is making available a new cultivar named BRSMG Alterosa, which has as main characteristics: high grain yield, high tillering, medium cicle, diseases tolerance and high grain quality. It was recommended in 2017.
Keywords:
Oryza sativa; genetic breeding; variety
| Cultivars | 2004/05 | 2005/06 | 2006/07 | 2007/08 | 2009/10 | 2010/11 | 2011/12 | 2013/14 | 2014/15 | 2015/16 | MW² |
|---|---|---|---|---|---|---|---|---|---|---|---|
| [1]¹ | [2] | [3] | [2] | [2] | [2] | [2] | [2] | [3] | [2] | ||
| BRSMG Alterosa | 7,250 | 7,020 | 6,801 | 8,138 | 5,532 | 6,392 | 7,208 | 5,796 | 5,482 | 6,580 | 6,544 a |
| Seleta | 6,730 | 7,171 | 6,280 | 7,490 | 6,048 | 6,155 | 6,805 | 4,257 | 6,018 | 6,574 | 6,316 a |
| Rio Grande | 6,285 | 6,781 | 5,998 | 7,494 | 5,988 | 5,221 | 5,907 | 4,613 | 6,289 | 6,467 | 6,099 a |
| Predileta | 6,854 | 6,950 | 5,726 | 7,967 | 5,716 | 5,525 | 6,304 | 4,187 | 5,977 | 6,089 | 6,068 ab |
| Ourominas | 5,971 | 8,202 | 6,129 | 7,045 | 4,905 | 5,671 | 5,572 | 3,988 | 5,950 | 5,893 | 5,941 ab |
| Rubelita | 6,946 | 7,438 | 5,864 | 7,403 | 5,557 | 4,237 | 5,331 | 4,534 | 5,369 | 6,448 | 5,835 b |
| CV (%) | 5,37 | 14,26 | 14,35 | 10,83 | 10,07 | 13,10 | 13,48 | 25,10 | 16,16 | 12,05 | 14,95 |
| Plant characteristics | Description |
|---|---|
| Leaf color | Green |
| Auricle color | Light green |
| Ligule color | Colorless to green |
| Leaf blade pubescence | Mean |
| Flag-leaf angle | 90 |
| Stem length | Medium (83.0 cm) |
| Stem thickness | Thick (6 mm) |
| Tiller angle | Right |
| Internode color | Light green |
| Panicle length | Short (19.0 cm) |
| Panicle type | Compact |
| Panicle exertion | Mean |
| Natural grain loss | Intermediate |
| Spikes: | |
| Apicule color | Green |
| Glume pubescence | Mean |
| Apicule color at flowering | Green |
| Apicule color at maturity | Yellow |
| Glume color | Straw/Golden |
| Tillering | High |
| Complete maturation cycle | Medium (130-140 days) |
| Plant height | 95 to 100 cm |
| Lodging | Resistant |
| Disease reaction: | |
| Leaf blast | Moderately resistant |
| Panicle blast | Moderately resistant |
| Brown Spot | Moderately resistant |
| Grain spot | Moderately resistant |
| Leaf scald | Moderately resistant |
| Traits | Values |
|---|---|
| Husked grain length | 7.53 mm |
| Husked grain width | 2.10 mm |
| Grain length/width ratio | 3.58 |
| Grain shape | Stretched |
| Grain class | Long-thin |
| 1000-seed weight | 25.9 g |
| Amylose content | Intermediate/low |
| Gelatinization temperature (GT) ¹ | 4.0 (intermediate) |
| Whole-grain yield | >55% |
| Chalkiness index ² | 3.0 |
