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Sex ratio distortion and semi-sterility in the progeny of irradiated Glossina morsitans

Published online by Cambridge University Press:  14 April 2009

C. F. Curtis ,
P. A. Langley ,
A. R. Mews ,
E. D. Offori ,
D. I. Southern  and
P. E. Bell
C. F. Curtis
Affiliation:
Tsetse Research Laboratory, Langford, Bristol, England
P. A. Langley
Affiliation:
Tsetse Research Laboratory, Langford, Bristol, England
A. R. Mews
Affiliation:
Seibersdorf Laboratory, International Atomic Energy Agency, Vienna, Austria
E. D. Offori
Affiliation:
Seibersdorf Laboratory, International Atomic Energy Agency, Vienna, Austria
D. I. Southern
Affiliation:
Department of Zoology, University of Manchester, Manchester, England
P. E. Bell
Affiliation:
Department of Zoology, University of Manchester, Manchester, England
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Male Glossina morsitans were subjected to various doses of gamma radiation in air or nitrogen and mated to untreated females. The sex ratio of the F1 progeny was biased towards males, and this may be explained by the extra vulnerability to dominant lethal induction that the presence of the large X chromosome gives to female determining sperms. The mean fertility of the F1 progeny was subnormal. This was due to the induction of 50 % sterility in a large proportion of F1 individuals. Cytogenetic examination of the progeny of outcrosses of F1 individuals indicated that in most of the semi-steriles there were translocations involving the large autosomes or the Y chromosomes. Almost all the normally fertile F1 flies gave only cytogenetically normal progeny. The F1 sex-ratio distortion and semi-sterility would provide a ‘bonus’ in the application of the sterile male technique, which would amount to a 15–50% saving in the releases required to achieve a population control target compared with the requirement if the F1 was normal.

Type
Research Article
Information
Genetics Research , Volume 21 , Issue 2 , April 1973 , pp. 153 - 165
Copyright
Copyright © Cambridge University Press 1973

References

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