Table II.
Segregation of ethylene-sensitivity trait in F2 populations
| Soybean Line | No. of Plants within Hypocotyl Length Class | χ2, P | ||
|---|---|---|---|---|
| <4 | 4–12.4 | ≥12.5 | ||
| Hobbit 87 | 49 | 0 | 0 | |
| T119N54 (etr1-1) | 0 | 4 | 75 | |
| F2: Hobbit 87 × T119N54 | 28 | 70 | 30 | 1.19, P = 0.55 for 1:2:1 |
| F2: T119N54 × Hobbit 87 | 44 | 85 | 28 | 4.34, P = 0.11 for 1:2:1 |
| <1.8 | ≥1.8 | |||
| A90-312022 | 58 | 10 | ||
| T10N5 (etr2-1) | 1 | 74 | ||
| F2: A90 × T10N5 | 123 | 29 | 0.003, P = 0.96 for 3:1 | |
| F2: T10N5 × A90 | 80 | 27 | 2.82, P = 0.09 for 3:1 | |
| <1.7 | ≥1.7 | |||
| A90-312022 | 68 | 24 | ||
| T10N6 (etr2-1) | 13 | 66 | ||
| F2: A90 × T10N6 | 84 | 41 | 4.05, P = 0.04 for 3:1 | |
| F2: T10N6 × A90 | 107 | 35 | 0.003, P = 0.96 for 3:1 | |
| <2.2 | 2.2–2.8 | >2.8 | ||
| A90-312022 | 34 | 36 | 0 | |
| T58N5 | 3 | 22 | 38 | |
| F2: A90 × T58N5 | 30 | 57 | 21 | 1.68, P = 0.43 for 1:2:1 |
| F2: T58N5 × A90 | 24 | 70 | 26 | 3.40, P = 0.18 for 1:2:1 |
| <3 | 3–6 | >6 | ||
| Hobbit 87 | 11 | 2 | 0 | |
| T119N54 (etr1-1) | 0 | 0 | 15 | |
| A90-312022 | 15 | 0 | 0 | |
| T15N23 (etr2-1) | 2 | 13 | 0 | |
| F2: T119N54 × T15N23 | 15 | 8 | 77 | 1.29, P = 0.52 for 3:1:12 |
Seedlings were germinated in darkness for 6 d in 18 μL L−1 ethylene. Column subheadings define hypocotyl length ranges (cm) for the respective phenotypic classes (see Methods); integer values for each plant line are the number of individual plants within the phenotypic class. χ2 and P values are for χ2 tests of similarity of the data to the noted ratio; accept ratio if P > 0.05.