Table 1.
Means and ranges of the seed yield (SY) and SY-related traits in the parental lines and the BnaTNDH population grown at an optimal N (ON) and a low N supply (LN) in three field trials
| Parental lines | BnaTNDH line | |||||||
|---|---|---|---|---|---|---|---|---|
| Trait | N treatment | Trial | Tapidor | Ningyou7 | Mean | Range | CV (%)a | h2b |
| PHc (cm) | ONi | Tri.1 | 129.6 ± 5.6a | 127.6 ± 3.9a | 140.2a | 109.3–169.2 | 8.5 | 0.75 |
| Tri.2 | 103.1 ± 5.9d | 109.6 ± 3.4 cd | 122.8c | 94.1–153.9 | 10.4 | |||
| Tri.3 | 124.2 ± 1.8ab | 130.6 ± 5.1a | 136.5b | 84.0–174.5 | 9.4 | |||
| LNj | Tri.1 | 116.4 ± 9.4bc | 123.5 ± 8.1ab | 122.4c | 97.0–154.3 | 9.2 | 0.56 | |
| Tri.2 | 104.2 ± 3.7d | 105.1 ± 1.3d | 117.7d | 84.4–154.3 | 10.5 | |||
| Tri.3 | 105.3 ± 12.1d | 113.0 ± 7.3 cd | 114.5e | 87.0–135.9 | 9.0 | |||
| BNd (N) | ON | Tri.1 | 4.5 ± 0.3c | 6.9 ± 0.4a | 5.9b | 4.3–7.6 | 12.4 | 0.59 |
| Tri.2 | 4.5 ± 0.8c | 6.5 ± 0.4a | 5.7c | 2.8–8.8 | 18.0 | |||
| Tri.3 | 6.3 ± 0.3ab | 7.1 ± 0.3a | 6.7a | 2.5–9.5 | 15.3 | |||
| LN | Tri.1 | 4.0 ± 0.7c | 5.5 ± 0.2b | 4.7e | 2.0–6.2 | 15.9 | 0.51 | |
| Tri.2 | 4.4 ± 0.2c | 5.5 ± 0.5b | 5.1d | 2.7–7.7 | 16.9 | |||
| Tri.3 | 4.4 ± 1.1c | 4.4 ± 0.4c | 4.4f | 1.9–6.7 | 18.0 | |||
| PNe (N) | ON | Tri.1 | 179.7 ± 58.0a | 124.8 ± 11.0bc | 164.3a | 54.4–406.1 | 27.3 | 0.59 |
| Tri.2 | 100.4 ± 13.8bcde | 118.5 ± 17.0bcd | 140.5b | 10.0–312.9 | 36.7 | |||
| Tri.3 | 105.4 ± 19.8bcd | 132.2 ± 9.5b | 124.0c | 18.5–244.4 | 38.2 | |||
| LN | Tri.1 | 82.7 ± 34.3cdef | 63.0 ± 11.8ef | 88.8d | 31.7–174.5 | 26.2 | 0.55 | |
| Tri.2 | 86.8 ± 6.0cdef | 81.0 ± 3.8def | 95.1d | 25.5–222.4 | 33.3 | |||
| Tri.3 | 56.5 ± 6.7f | 57.4 ± 13.1f | 46.8e | 5.8–106.3 | 38.6 | |||
| SNf (N) | ON | Tri.1 | 15.7 ± 2.0ab | 16.3 ± 0.9a | 17.7a | 11.0–25.0 | 17.4 | 0.69 |
| Tri.2 | 14.0 ± 1.0abcd | 15.4 ± 1.2abc | 14.1c | 4.5–21.6 | 20.9 | |||
| Tri.3 | 12.7 ± 0.8de | 15.5 ± 0.8abc | 15.0b | 2.2–22.2 | 24.4 | |||
| LN | Tri.1 | 14.3 ± 0.3abcd | 13.9 ± 1.0abcd | 14.8b | 7.1–22.1 | 22.9 | 0.67 | |
| Tri.2 | 13.1 ± 1.5cde | 13.1 ± 1.4cde | 13.4d | 6.6–23.1 | 19.5 | |||
| Tri.3 | 11.0 ± 2.0e | 13.2 ± 1.7bcde | 12.3e | 4.2–22.8 | 29.0 | |||
| SWg (g/1000 seeds) | ON | Tri.1 | 2.3 ± 0.1e | 3.8 ± 0.1b | 2.9c | 2.1–4.1 | 13.3 | 0.84 |
| Tri.2 | 2.5 ± 0.1d | 4.0 ± 0.1ab | 3.1b | 2.0–4.8 | 14.2 | |||
| Tri.3 | 2.1 ± 0.1f | 3.6 ± 0.2c | 2.7d | 1.4–4.0 | 15.8 | |||
| LN | Tri.1 | 2.3 ± 0.1e | 3.9 ± 0.1b | 2.9c | 1.9–4.1 | 15.0 | 0.80 | |
| Tri.2 | 2.5 ± 0.1d | 4.1 ± 0.2a | 3.3a | 2.1–5.0 | 14.7 | |||
| Tri.3 | 2.1 ± 0.1f | 3.5 ± 0.1c | 2.7d | 1.1–4.7 | 20.8 | |||
| SYh (kg/ha) | ON | Tri.1 | 1194.8 ± 308.5b | 1465.7 ± 167.9a | 1509.8a | 455.7–2297.4 | 24.7 | 0.76 |
| Tri.2 | 603.1 ± 140.0 cd | 1355.3 ± 79.6ab | 1120.0b | 263.1–2210.0 | 36.9 | |||
| Tri.3 | 470.1 ± 73.0d | 1332.8 ± 168.5ab | 974.8c | 50.4–2029.6 | 49.2 | |||
| LN | Tri.1 | 489.9 ± 183.0d | 651.6 ± 167.5 cd | 703.0d | 168.3–1353.7 | 32.4 | 0.73 | |
| Tri.2 | 535.3 ± 79.1 cd | 807.1 ± 108.8c | 747.7d | 153.4–1708.6 | 36.8 | |||
| Tri.3 | 208 ± 35.9e | 501.4 ± 92.1d | 303.5e | 13.1–979.9 | 57.1 | |||
Different letters indicated the significant difference at P = 0.05 level. Data are mean ± SD, n = 3. aCV, coefficient of variation; bh2, broad-sense heritability; cPH, plant height; dBN, branch number; ePN, pod number per plant; fSN, seed number per pod; gSW, seed weight of 1000 seeds; hSY, seed yield; iON, optimal nitrogen; jLN, low nitrogen