Table 2.
Drought stress tolerant index, heterosis, and heterobeltiosis base on seed weight/plant of soybean genotypes in two irrigation conditions.
| No. | Genotypes | Seed weight/plant | Heterosisa | Heterobeltiosisa | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Normal (g) | Drought (g) | STIb | Normal (%) | Drought (%) | STI (%) | Normal (%) | Drought (%) | STIb (%) | ||
| 1 | (G/D)-75-30-12 | 14.25 | 5.13 | 0.57 | 62 | −25 | 18 | 54 | −39 | −5 |
| 2 | (G/D)-75-50-30 | 12.39 | 7.97 | 0.77 | 41 | 17 | 60 | 34 | −5 | 28 |
| 3 | (G/D)-88-31-13 | 12.03 | 7.16 | 0.67 | 37 | 5 | 40 | 30 | −15 | 12 |
| 4 | (G/D)-94-9-4 | 9.60 | 7.03 | 0.52 | 9 | 3 | 9 | 4 | −16 | −13 |
| 5 | (G/D)-97-10-5 | 13.15 | 7.53 | 0.77 | 50 | 10 | 60 | 42 | −10 | 28 |
| 6 | (G/D)-99-32-14 | 11.70 | 9.48 | 0.86 | 33 | 39 | 80 | 26 | 13 | 44 |
| 7 | (G/D)-100-33-15 | 12.91 | 7.74 | 0.78 | 47 | 13 | 62 | 40 | −8 | 30 |
| 8 | (G/D)-102-34-16 | 11.59 | 7.92 | 0.71 | 32 | 16 | 49 | 25 | −6 | 19 |
| 9 | (G/D)-235-42-23 | 11.11 | 8.53 | 0.74 | 27 | 25 | 54 | 20 | 2 | 23 |
| 10 | (G/D)-239-43-24 | 9.88 | 5.43 | 0.42 | 13 | −20 | −13 | 7 | −35 | −30 |
| 11 | (G/D)-240-44-25 | 10.83 | 8.40 | 0.71 | 23 | 23 | 47 | 17 | 0 | 18 |
| 12 | (G/D)-241-45-26 | 10.07 | 4.87 | 0.38 | 15 | −29 | −21 | 9 | −42 | −36 |
| 13 | (G/D)-242-46-27 | 11.82 | 4.78 | 0.44 | 35 | −30 | −8 | 28 | −43 | −27 |
| 14 | (G/D)-245-47-28 | 10.85 | 6.90 | 0.58 | 24 | 1 | 21 | 17 | −18 | −3 |
| 15 | (G/D)-257-48-29 | 13.00 | 6.37 | 0.64 | 48 | −7 | 34 | 41 | −24 | 7 |
| 16 | Dering (D)c | 9.25 | 8.40 | 0.60 | — | — | — | — | — | — |
| 17 | Grobogan (G)c | 8.31 | 5.26 | 0.34 | — | — | — | — | — | — |
| Mean | 11.34 | 6.99 | 0.62 | 33.0 | 2.7 | 32.8 | 26.3 | −16.5 | 6.2 | |
aHeterosis (%) and heterobeltiosis (%) base on seed weight/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.