Table 4.
Mean values of yield and yield components for 26 bread wheat genotypes released in different periods in Spain and grown in eight multi-location experiments. Numbers in parentheses indicate the percentage of change with respect to the previous period. The standard error of the differences (s.e.d.) of the means of yield and yield components are presented
| Breeding period | d.f. | Yield (kg/ha) | Spikes/m2 * | Grains/spike | MGW (10−3 g) |
|---|---|---|---|---|---|
| Landraces | 4 | 2457 | 401 | 22·3 | 36·7 |
| Initial | 2 | 3198 (30) | 432 (7·7) | 35·2 (58) | 30·7 (−16) |
| Intermediate | 8 | 4397 (37) | 459 (6·2) | 36·8 (4·5) | 33·4 (8·8) |
| Modern | 8 | 4628 (5·2) | 483 (5·2) | 36·7 (−0·3) | 33·0 (−1·2) |
| s.e.d. | 274 | 39·5 | 2·45 | 1·92 |
*
The number of spikes/m2 could not be determined in A07.