TABLE 3

Assaying Hmr1 and 9D/9E aberrations for suppression of hybrid female lethality

Hybrid female progeny (Hmr1 or In(1)AB males in parentheses)
+/XsimHmr1/Xsim, In(1)AB/Xsim, or Df/Xsim
Female parent (deduced Hmr genotype)Temp.Relative viabilitya (%)Number alive for referenceEstimated viabilityb (%)Total females (or males) c
w Hmr1/FM6 (Hmr)18°111.08284.1195
(1)(1.2)(138)
25°0110108.9202
(0)(0)(5)
In(1)AB, w/FM6 (Hmr)18°79.77984.9186
(28)(16.8)(167)
25°09286.0214
(33)(37.0)(89)
29°09985.0233
(0)(0)(99)
Df(1)ras203,y v/FM7c (Hmr)18°109.7154d77.4398
25°0.713797.9280
29°010088.5226
Df(1)N110,w/FM6 (Hmr)18°107.111389.0254
25°0279100.9553
29°0103104.6197
Df(1)HC133/FM6 (Hmr)18°114.08680.8213
25°43.0e14277.4367
29°0.617391.1380
Df(1)ras-v17/ct oc (Hmr)18°100.04096.483
25°1.28195.9169
29°06797.1138
Df(1)v-L11,v/FM6 (Hmr)18°73.9153100.7304
25°2.412698.8255
29°0.518796.9386
Df(1)v-L15,v/FM7c (Hmr)25°18.565f106.6122
29°021498.6434
Df(1)RJ7, v f/FM6 (Hmr)18°83.0247107.6459
25°15.320292.4437
29°0135117.4230
Df(1)B13/FM7c (Hmr)18°40.025135.137
25°9.5168106.7315
29°089140.2127
Df(1)CH6/FM7c (Hmr+)18°92.813996.9287
25°68.22221.9201
29°00152
Df(1)C52/FM6 (Hmr+)18°229.24850.3191
25°100.046.5123
29°0062
Df(1)AC2LABR/FM7c (Hmr+)18°70.257114.0100
25°00363
29°00233
Df(1)v-64f/FM7c (Hmr+)18°87.7203105.2386
25°40.0156.9435
29°00239
  • All crosses were D. melanogaster females of the genotype indicated in the first column crossed to D. simulans ryi83 males.

  • a Calculated as the number of alive +/Xsim females relative to the number of alive reference siblings.

  • b Estimated viability for females is calculated as the number alive divided by one-half the total number of females; for males, as the number alive divided by the total number of males. This calculation assumes that rescued males and both classes of females are fully viable up to the pharate adult stage and that nonrescued males are fully lethal before the pharate adult stage.

  • c Total number equals live, dead eclosed, and dead pharate animals. The lethal phase of hybrid females was predominantly posteclosion at 25° and pharate adult at 29°.

  • d An additional two live, six dead eclosed, and seven dead pharate exceptional females (y2 v B/B+ phenotype) were observed.

  • e This cross also included 36 phenotypically wild-type males (presumed to be patroclinous exceptions), suggesting that there was a high rate of nondisjunction. Some of these females thus may also be exceptional (Df(1)HC133/FM6/Ysim) but would be phenotypically indistinguishable from nonexceptional (FM6/Xsim) siblings. We observed 13 and 29 phenotypically wild-type males at 18° and 29°, respectively.

  • f An additional single live exceptional female (v B/B+ phenotype) was observed.