TABLE 9

Hmr1 suppresses postembryonic lethality in mhr-rescued hybrid females

Hybrid progeny
Crossing schemeTemp.aMale parent (deduced Hmr genotype)No. of females (% relative viability)No. of Xsim/Ymel brothers for reference
A18°v+ (Hmr+)37 (43.5)85
v (Hmr1)25 (31.6)79
25°v+ (Hmr+)2 (1.5)b,c130b,c
v (Hmr1)29 (28.5)b,d102b,d
B18°w+ (Hmr+)29 (24.6)118
w (Hmr1)31 (12.3)253
25°w+ (Hmr+)0442
w (Hmr1)8 (3.0)263
25°w+ (Hmr+)1 (0.30) b,e329b,e
w (Hmr1)27 (9.5)b,f284b,f
29°w+ (Hmr+)0168
w (Hmr1)2 (0.8)251
  • Crossing schemes: (A) Hmr1 v/FM6 females were crossed to Nguruman-4 males; nonbalancer virgin daughters (Hmr1 v/++) were crossed again to Nguruman-4 males. F2 v+ (presumed Hmr+) and v (presumed Hmr1) sons were crossed separately to y w f; mhr D. simulans females. (B) w Hmr1 v/FM6 females were crossed to w P{w+mC = EP}EP1093 males; nonbalancer virgin daughters (Hmr1/P{w+) were crossed to y w males. F2 w+ (presumed Hmr+) and w (presumed Hmr1) sons were crossed separately to y w f; mhr D. simulans females.

  • a Crosses were kept at 25° for 24 hr after removing the parents and then shifted to the indicated temperature.

  • b Dead hybrid progeny were scored in these crosses.

  • c 15 dead eclosed, 9 dead pharate females; 1 dead eclosed, 14 dead pharate males.

  • d 0 dead eclosed, 2 dead pharate females; 0 dead eclosed, 5 dead pharate males.

  • e 14 dead eclosed, 26 dead pharate females; 4 dead eclosed, 2 dead pharate males.

  • f 2 dead eclosed, 6 dead pharate females; 3 dead eclosed, 45 dead pharate males.