TABLE 1

Role of Mod(mdg4) in repression of transposition of the P constructs containing one or two copies of the Su(Hw) insulator

mod(mdg4)+/mod(mdg4)+mod(mdg4)u1/mod(mdg4)u1
TransposonTotal (Nu)Q (%)Total (Nu)Q (%)P
ESY
 (1)1240 (16)1.33360 (127)3.8<0.0001
 (2)3620 (47)1.32310 (126)5.5<0.0001
 (3)4940 (41)0.84240 (245)5.8<0.0001
ES(−893)YS
 (1)2120 (21)1.0970 (68)7.0<0.0001
 (2)2000 (14)0.72750 (136)4.9<0.0001
 (3)1930 (21)1.1730 (47)6.4<0.0001
 (4)4190 (39)0.9890 (38)4.3<0.0001
WS
 (1)1960 (1)0.051120 (65)5.8<0.0001
 (2)1090 (8)0.41320 (54)4.1<0.0001
  • Total, the total number of scored males; Nu, the total number of males with a transposon insertion at an autosome; Q, the average frequency of transposition. The probability value (P) was determined with a 2 × 2 contingency test (the Statistica 6.0 program, StatSoft, 1984–2001) comparing frequencies of P transposition on the mod(mdg4)+ and mod(mdg4)u1 backgrounds.