Table 1 Frequency of F1 males derived from C. briggsae mothers
Cross♀♀♂♂Fract. ♂♂ Fract. XCbr (N)
C. briggsae AF16 ♂♂ × C. nigoni EG5268 ♀♀a293320.098b
C. nigoni EG5268 ♂♂ × C. briggsae AF16 ♀♀c42900.000
C. briggsae AF16 ♂♂ × PB3500 cybrid ♀♀d383390.092b
C. nigoni EG5268 ♂♂ × C. briggsae RE980 ♀♀e330680.171
C. nigoni EG5268 ♂♂ × C. briggsae PB192 ♀♀e6341420.1830.60 (131)f
C. nigoni EG5268 ♂♂ × C. briggsae cbr-him-8(v188) ♀♀e,g9642100.179
  • 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.