Summary
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1.
Females from the stocks R pe-333, R ti-277, R st-940, and R oy-2 produce few or no female offspring when mated with + males. In each case, the reciprocal cross yields the normal percentage (85%) of female offspring.
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2.
The females from these incompatible stocks contain active sperm within their spermathecae after mating with + males.
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3.
In incompatible crosses, almost all eggs laid develop into males with no evidence that female embryos or larvae fail to develop.
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4.
Egg maturation and fertilization normally follows a pattern similar to Habrobracon.
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5.
Sperm from + males enter R ti-277 eggs but form a tangled mass of chromatin instead of chromosomes. The maturation divisions of the eggs are normal, and only the chromosomes of the egg pronuclei contribute to the development of the offspring.
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Communicated by E. Hadorn
This study was supported in part by a National Science Foundation grant (G 24322) to G. B. S. and a National Science Foundation fellowship to S. L. R.
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Ryan, S.L., Saul, G.B. Post-fertilization effect of incompatibility factors in Mormoniella . Molec. Gen. Genet. 103, 29–36 (1968). https://doi.org/10.1007/BF00271154
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DOI: https://doi.org/10.1007/BF00271154