Table 1. Frequency of F1 males derived from C. briggsae mothers.
| Cross | ♀♀ | ♂♂ | Fract. ♂ | ♂ Fract. XCbr (N) |
|---|---|---|---|---|
| C. briggsae AF16 ♂♂ × C. nigoni EG5268 ♀♀a | 293 | 32 | 0.098b | |
| C. nigoni EG5268 ♂♂ × C. briggsae AF16 ♀♀c | 429 | 0 | 0.000 | |
| C. briggsae AF16 ♂♂ × PB3500 cybrid ♀♀d | 383 | 39 | 0.092b | |
| C. nigoni EG5268 ♂♂ × C. briggsae RE980 ♀♀e | 330 | 68 | 0.171 | |
| C. nigoni EG5268 ♂♂ × C. briggsae PB192 ♀♀e | 634 | 142 | 0.183 | 0.60 (131)f |
| C. nigoni EG5268 ♂♂ × C. briggsae cbr-him-8(v188) ♀♀e,g | 964 | 210 | 0.179 |
AF16, C. briggsae wild-isolate; EG5268, C. nigoni wild-isolate; PB3500, EG5268 nuclear genome and AF16 mitochondria; RE980, C. briggsae cbr-him-8(v188) I; PB192, C. briggsae cbr-him-8(v188) I; stIs20120 [pmyo2::GFP] X (RE980 and PB192 are both AF16 derivatives).
a,c,d,e
These crosses are diagrammed in Figure 2, A, B, C, and D, respectively.
b
♂ frequencies not significantly different, P = 0.677 chi squared test, expected frequency = 0.098.
f
Sum of results from crosses using RE980 and PB192 ♀♀.
g
Pharyngeal expression of GFP observed in 79 of 131 F1 males scored.