Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-23T00:29:38.171Z Has data issue: false hasContentIssue false
  • English
  • Français

Segregation and pairing of compound fifth-chromosomes in Lucilia cuprina males

Published online by Cambridge University Press:  14 April 2009

G. G. Foster  and
R. H. Maddern
G. G. Foster
Affiliation:
CSIRO Division of Entomology, GPO Box 1700, Canberra, A.C.T. 2601, Australia
R. H. Maddern
Affiliation:
CSIRO Division of Entomology, GPO Box 1700, Canberra, A.C.T. 2601, Australia
Rights & Permissions [Opens in a new window]

Summary

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Variability in fertility in compound chromosome (CC) strains of Lucilia cuprina (Wiedemann) is directly correlated with the segregation properties of the CCs in those strains. In compound fifth-chromosomes, high fertility (up to 50% ) is associated with high frequencies of segregation of the left element (C(5L)) from the right element (C(5R)) in males, while low fertility (up to 25%) is associated with random assortment of the CCs in males. Regular segregation of C(5L) and C(5R) chromosomes in males is associated with particular C(5L) elements, which contain cytologically visible duplications of 5R chromatin. These duplications may contain a site which is normally involved in the pairing of the fifth chromosomes in males.

In females the CCs segregate from one another with a frequency of 89%. None of the C(5R) elements studied affected segregation in males, and neither C(5L) nor C(5R) elements had any demonstrable effect on segregation in females. Transmission of certain CC elements through one or both sexes is significantly lower than expected. This could have a variety of causes, such as meiotic drive, inviability associated with position effects, or homozygosis of deleterious mutations on homologous CC arms during meiotic crossing over in females. The CC strains released during a field trial of genetic control contained both high-fertility and low-fertility C(5L) chromosomes. Both types of CC were subsequently recovered from individuals which had overwintered in the field. Over a period of several generations following this recolonization one particular high-fertility C(5L) chromosome increased in frequency to near-fixation, despite the presence in this chromosome of deleterious mutations.

Type
Research Article
Information
Genetics Research , Volume 46 , Issue 2 , October 1985 , pp. 149 - 167
Copyright
Copyright © Cambridge University Press 1985

References

REFERENCES

Baldwin, M. & Chovnick, A. (1967). Autosomal half-tetrad analysis in Drosophila melanogaster. Genetics 55, 277–293.CrossRefGoogle ScholarPubMed
Fitz-Earle, M. & Holm, D. G. (1983). Drosophila melanogaster models for the control of insect pests. In The Genetics and Biology of Drosophila, vol. 3c (ed. Ashburner, M., Carson, H. L. and Thompson, J. H.). New York, Academic Press.Google Scholar
Foster, G. G. (1982). The use of bridging systems to increase genetic variability in compound chromosome strains for genetic control of Lucilia cuprina (Wiedemann). Theoretical and Applied Genetics 63, 295–305.CrossRefGoogle ScholarPubMed
Foster, G. G., Whitten, M. J. & Konowalow, C. (1976). The synthesis of compound autosomes in the Australian sheep blowfly Lucilia cuprina. Canadian Journal of Genetics and Cytology 18, 169–177.CrossRefGoogle ScholarPubMed
Foster, G. G., Maddern, R. H. & Mills, A. A. (1980 a). Genetic instability in mass-rearing colonies of a sex-linked translocation strain of Lucilia cuprina (Wiedemann) (Diptera: Calliphoridae) during a field trial of genetic control. Theoretical and Applied Genetics 58, 169–175.CrossRefGoogle ScholarPubMed
Foster, G. G., Whitten, M. J., Konowalow, C., Bedo, D. G., Maddern, R. H. & Boon, D. J. (1980 b). Cytogenetic studies of Lucilia cuprina dorsalis (Wiedemann) (Diptera: Calliphoridae). Polytene chromosome maps of the autosomes and cytogenetic localization of visible genetic members. Chromosma (Berl.) 81, 151–168.CrossRefGoogle Scholar
Foster, G. G., Maddern, R. H., Helman, R. A. & Reed, E. M. (1985). Field trial of a compound chromosome strain for genetic control of the sheep blowfly Lucilia cuprina. Theoretical and Applied Genetics (In press).CrossRefGoogle ScholarPubMed
Gethmann, R. C. (1976). Meiosis in male Drosophila melanogaster. II. Nonrandom segregation of compound-second chromosomes. Genetics 83, 743–751.CrossRefGoogle ScholarPubMed
Hilliker, A. J., Holm, D. G. & Appels, R. (1982). The relationship between heterochromatic homology and meiotic segregation of compound second autosomes during spermatogenesis in Drosophila melanogaster. Genetical Research, Camb. 39, 157–168.CrossRefGoogle ScholarPubMed
Holm, D. G. (1976). Compound autosomes. In The Genetics and Biology of Drosophila, vol. 1b (ed. Ashburner, M. and Novitski, E.), pp. 529–561. New York: Academic Press.Google Scholar
Holm, D. G. & Chovnick, A. (1975). Compound autosomes in Drosophila melanogaster: The meiotic behaviour of compound thirds. Genetics 81, 293–311.CrossRefGoogle ScholarPubMed
Konovalov, C. A., Foster, G. G. & Whitten, M. J. (1983). Viability and fertility of sex-linked autosomal duplications in Lucilia cuprina (Wiedmann). Theoretical and Applied Genetics 65, 9–16.CrossRefGoogle Scholar
Lewontin, E. C. & Felsenstein, J. (1965). The robustness of homogeneity tests in 2 × N tables. Biometrics 21, 19–33.CrossRefGoogle Scholar
Maddern, R. H. (1981). Radiation induced sex chromosome loss as an indicator of the optimal stage during spermatogenesis for the induction of compound chromosomes in Lucilia cuprina. Canadian Journal of Genetics and Cytology 23, 101–109.CrossRefGoogle Scholar
Smith, P. H. & Morton, R. (1985). Assessment of the field performance of compound chromosome strains compared to laboratory-reared wild-type in Lucilia cuprina (Wiedemann) (Diptera: Calliphoridae). Bulletin of entomological Research 75, (In press).CrossRefGoogle Scholar
Woodburn, T. L., Vogt, W. G. & Kitching, R. L. (1978). Estimation of age of females in field populations of Lucilia cuprina (Wiedemann) (Diptera: Calliphoridae) using ambient temperature and solar radiation. Bulletin of entomological Research 68, 251–261.CrossRefGoogle Scholar