TABLE 3.
Inheritance analysis of resistance to Cry2Ab in T. ni strain GLEN-BGII on cotton plants
| Expt | T. ni larvae | % survival on cotton plant leaves for 3 days |
||
|---|---|---|---|---|
| Non-Bt cotton control (100 larvae) | BollGard I (100 larvae) | BollGard II (150 larvae) | ||
| I | GLEN-Cry1Ac-BCS | 92 | 93 | 0 |
| GLEN-BGII | 93 | 95 | 61 | |
| F1a (GLEN-Cry1Ac-BCS ♂ × GLEN-BGII ♀) | 99 | 99 | 1a | |
| F1b (GLEN-Cry1Ac-BCS ♀ × GLEN-BGII ♂) | 93 | 98 | 5a | |
| II | GLEN-Cry1Ac-BCS | 100 | 98 | 1a |
| GLEN-BGII | 99 | 96 | 67 | |
| F2 (from GLEN-Cry1Ac-BCS ♂ × GLEN-BGII ♀) | 98 | 100 | 21 (expected value, 19; P = 0.61)b | |
| BCS (F1a ♀ × GLEN-BGII ♂) | 96 | 97 | 44 (expected value, 36; P = 0.10)c | |
a
These survivors all died within 7 days on BollGard II leaves.
b
Expected % survival = (% of average survival of F1a and F1b progeny)/2 + (% of survival of GLEN-BGII)/4. Statistical significance was determined with the χ2 test, using percentage data.
c
Expected % survival = (% of survival of F1b progeny)/2 + (% of survival of GLEN-BGII)/2. Statistical significance was performed with the χ2 test, using percentage data.