Table 2. Response of backcross progeny upon dicamba treatment and evaluation of fertility of the progeny.
Segregation of resistant (R) and susceptible (S) plants in backcross progeny following treatment with 200 g ae/ha of dicamba.
| Backcross | Segregation of plants | χ 2 | P-value | Fertility of R plants | |
|---|---|---|---|---|---|
| R | S | ||||
| BC1F1 | 5 | 0 | - | - | Plants were pollen fertile and female sterile |
| BC2F1 | 4 | 5 | 0.11 | 0.7389 | Only 1 R plant was pollen fertile |
| BC3F1 | 30 | 9 | 11.3 | 0.0008 | 17 R plants were pollen fertile |
| BC4F1 | 9 | 26 | 8.25 | 0.0041 | All R plants were pollen fertile |
| BC5F1 | 19 | 15 | 0.47 | 0.4927 | All R plants were pollen fertile |
| BC6F1 | 17 | 13 | 0.53 | 0.4652 | All R plants were pollen fertile |
| BC7F1 | 17 | 16 | 0.03 | 0.8618 | All R plants were pollen fertile |
χ 2:Chi-square values are the results of tests for goodness of fit to a 1:1 (R:S) segregation model. P-value significance is determined at < 0.05.