The intervarietal hybrid ‘UENF 506-11’ was derived from full-sib maize families in the 11th cycle of reciprocal recurrent selection. It produces a grain yield of 7.57 tons ha-1, and is recommended for cultivation in the North and Northwest regions of the Rio de Janeiro State.
Keywords:
Zea mays L.; reciprocal recurrent selection; cultivar; plant breeding.
| SV | DF | Mean squares | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| STAND | NLP | DFL | NE | EW | GW | HW | W100 | GY | ||
| B/E | 36 | 7.33 | 5.89 | 5.39 | 27.93 | 0.88 | 0.64 | 825.97 | 664.53 | 3.21 |
| Block (B) | 4 | 12.5 | 8.18 | 13.79 | 44.14 | 0.90 | 1.20 | 1213.34 | 320.78 | 5.99 |
| B X E | 32 | 6.68 | 5.6 | 4.34 | 25.91 | 0.88 | 0.57 | 777.55 | 707.50 | 2.86 |
| Genotype (G) | 4 | 285.19** | 113.49** | 155.44** | 576.64** | 36.5** | 33.14** | 29211.8** | 12463.20** | 163.74** |
| Environment (E) | 8 | 97.47** | 76.90** | 424.55** | 220.75** | 13.26** | 9.98** | 5252.86** | 11634.98** | 49.34** |
| G X E | 17 | 85.92** | 12.16 | 13.02 | 127.56** | 1.89 | 0.83* | 2063.12 | 1616.72** | 4.11* |
| Error | 71 | 14.10 | 8.8 | 8.03 | 39.34 | 1.29 | 0.47 | 1378.66 | 556.26 | 2.35 |
| Mean | 23.23 | 2.4 | 62.99 | 25.27 | 3.61 | 3.02 | 744.29 | 304.34 | 6.72 | |
| CV (%) | 16.16 | 123.59 | 4.49 | 24.81 | 31.43 | 22.77 | 4.9 | 7.75 | 22.78 | |
| H2 | 0.95 | 0.92 | 0.95 | 0.93 | 0.96 | 0.98 | 0.95 | 0.95 | 0.98 | |
| Cultivars | Grain yield (tons ha-1) |
|---|---|
| AG 1051 | 8.86 a |
| ‘UENF 506-11’ | 7.57 b |
| BM 2202 | 7.23 b |
| BR 106 | 6.14 c |
| SOL DA MANHÃ | 3.78 d |
| MSD | 0.69 |
| Morpho-agronomics traits | |||||
|---|---|---|---|---|---|
| Plant height | Ear height | Plant density | Ear index | ||
| ‘UENF 506-11’ | Mean | 2.07 | 1.27 | 24 | 1.2 |
| Upper limit | 2.63 | 2.25 | 30 | 1.6 | |
| Lower limit | 1.44 | 0.80 | 17 | 0.4 | |
| Female flowering | Male flowering | 1000-grain weight (g) | Grain yield (t ha-1) | ||
| Mean | 64 | 64 | 314 | 7.57 | |
| Upper limit | 71 | 75 | 380 | 11.56 | |
| Lower limit | 59 | 58 | 250 | 1.78 | |
| Plant height | Ear height | Plant density | Ear index | ||
| ‘BM 2202’ | Mean | 1.85 | 0.99 | 25 | 1.1 |
| Upper limit | 2.31 | 1.33 | 41 | 1.5 | |
| Lower limit | 1.41 | 0.54 | 18 | 0.5 | |
| Female flowering | Male flowering | 1000-grain weight (g) | Grain yield (t ha-1) | ||
| Mean | 59 | 60 | 296 | 7.24 | |
| Upperlimit | 66 | 67 | 380 | 11.78 | |
| Lower limit | 53 | 54 | 210 | 0.57 | |
| Plant height | Ear height | Plant density | Ear index | ||
| ‘BR 106’ | Mean | 1.94 | 1.07 | 24 | 1.1 |
| Upper limit | 2.38 | 1.80 | 29 | 1.8 | |
| Lower limit | 1.25 | 0.65 | 20 | 0.3 | |
| Female flowering | Male flowering | 1000-grain weight (g) | Grain yield (t ha-1) | ||
| Mean | 59 | 61 | 304 | 6.15 | |
| Upper limit | 62 | 65 | 360 | 11.56 | |
| Lower limit | 53 | 54 | 248 | 1.08 | |
