Table 4.
Stress tolerant index and heterosis of normal pods number/plant of soybean genotypes in two irrigation conditions.
| No. | Genotypes | Normal pods number/plant | Heterosis of normal pods number/planta | Empty pods number/plant | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Normal (g) | Drought (g) | STIb | Normal (%) | Drought (%) | STIb (%) | Normal (%) | Drought (%) | STIb | ||
| 1 | (D/G)-75-30-12 | 45.9 | 28.3 | 0.75 | 23 | −16 | −3 | 4.1 | 15.9 | 4.07 |
| 2 | (D/G)-75-50-30 | 43.5 | 32.6 | 0.82 | 17 | −3 | 6 | 3.0 | 16.4 | 3.08 |
| 3 | (D/G)-88-31-13 | 45.3 | 36.2 | 0.95 | 22 | 8 | 22 | 3.5 | 11.3 | 2.47 |
| 4 | (D/G)-94-9-4 | 38.5 | 34.3 | 0.77 | 3 | 2 | −2 | 4.1 | 7.4 | 1.90 |
| 5 | (D/G)-97-10-5 | 45.5 | 39.4 | 1.04 | 22 | 17 | 33 | 3.7 | 7.6 | 1.76 |
| 6 | (D/G)-99-32-14 | 43.6 | 45.2 | 1.14 | 17 | 34 | 47 | 3.7 | 6.8 | 1.57 |
| 7 | (D/G)-100-33-15 | 44.0 | 42.0 | 1.07 | 18 | 25 | 38 | 3.7 | 6.2 | 1.43 |
| 8 | (D/G)-102-34-16 | 39.7 | 41.9 | 0.97 | 7 | 25 | 24 | 3.8 | 8.5 | 2.02 |
| 9 | (D/G)-235-42-23 | 42.9 | 45.5 | 1.13 | 15 | 35 | 45 | 3.9 | 6.7 | 1.63 |
| 10 | (D/G)-239-43-24 | 37.3 | 23.3 | 0.50 | 0 | −31 | −35 | 3.6 | 18.5 | 4.16 |
| 11 | (D/G)-240-44-25 | 39.7 | 42.1 | 0.97 | 7 | 25 | 24 | 4.7 | 6.6 | 1.94 |
| 12 | (D/G)-241-45-26 | 38.7 | 21.7 | 0.49 | 4 | −36 | −37 | 3.4 | 20.5 | 4.36 |
| 13 | (D/G)-242-46-27 | 44.3 | 28.5 | 0.73 | 19 | −15 | −6 | 2.8 | 14.1 | 2.47 |
| 14 | (D/G)-245-47-28 | 37.4 | 31.9 | 0.69 | 1 | −5 | −11 | 3.3 | 13.3 | 2.74 |
| 15 | (D/G)-257-48-29 | 45.5 | 30.9 | 0.82 | 22 | −8 | 5 | 3.9 | 14.4 | 3.51 |
| 16 | Dering (D)c | 44.2 | 47.2 | 1.21 | — | — | — | 3.2 | 8.5 | 1.70 |
| 17 | Grobogan (G)c | 30.2 | 20.1 | 0.35 | — | — | — | 9.5 | 19.5 | 11.58 |
| Mean | 41.5 | 34.8 | 0.84 | 12 | 3 | 8 | 4.0 | 11.9 | 2.97 | |
aHeterosis (%) base on normal pods number/plant.
bSTI = stress tolerant index.
cParents of 15 soybean lines: Dering 1 variety = tolerant drought but small seed size and Grobogan variety = large seed size but susceptible to drought.