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Chromosome translocations in Glossina austeni

Published online by Cambridge University Press:  14 April 2009

C. F. Curtis ,
D. I. Southern ,
P. E. Pell  and
T. A. Craig-Cameron
C. F. Curtis
Affiliation:
Tsetse Research Laboratory, Langford, Bristol
D. I. Southern
Affiliation:
Zoology Department, University of Manchester
P. E. Pell
Affiliation:
Zoology Department, University of Manchester
T. A. Craig-Cameron
Affiliation:
Zoology Department, University of Manchester
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Summary

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An autosomal translocation in the tsetse fly Glossina austeni was studied genetically, cytogenetically and for its effects on viability. Flies homo-zygous for the structural change could be identified by outcrossing to wild-type and demonstrating semi-sterility in all the progeny.

A cytogenetical analysis of male meioses in samples of pupae which were sibs of the semi-sterile progeny showed them to be structurally heterozygous for the translocation. Matings of the translocation heterozygotes and homozygotes gave the expected progeny ratios, with the exception of a deficit of females classified as translocation homozygotes. This was due to their sterility or inviability. Those female homozygotes which did breed showed a subnormal lifetime pupal production. These deleterious recessive effects were probably due to the translocation itself although the influence of linked loci could not be ruled out. These effects would prevent the mass rearing of this particular translocation for a tesetse control project.

Two other stocks which showed semi-sterility were found to carry autosomal translocations and two which currently showed holandric inheritance have Y-autosome translocations. One stock with holandric inheritance of extreme sterility carries a double translocation involving two autosomes and the Y chromosome.

Type
Research Article
Information
Genetics Research , Volume 20 , Issue 1 , August 1972 , pp. 101 - 113
Copyright
Copyright © Cambridge University Press 1972

References

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