Hostname: page-component-84b7d79bbc-rnpqb Total loading time: 0 Render date: 2024-07-29T16:11:02.395Z Has data issue: false hasContentIssue false
  • English
  • Français

Chromosomal and extrachromosomal transmission of cellular melanization in the Freckled phenotype in Drosophila melanogaster

Published online by Cambridge University Press:  14 April 2009

C. Barigozzi  and
M. Sari Gorla
C. Barigozzi
Affiliation:
Institute of Genetics, University of Milan—20133, Milan, Italy
M. Sari Gorla
Affiliation:
Institute of Genetics, University of Milan—20133, Milan, Italy

Extract

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.

Freckled (Frd) is a dominant mutant of D. melanogaster, lethal in double dose, which manifests itself by melanization in the adult stage, while nothing can be noticed in the larva and/or in the pupa. Its localization has been determined at nearly 102 of the second chromosome.

Among the offspring from backcrosses involving Frd, some individuals that do not carry the Frd gene exhibit a weak Frd manifestation in the adult stage, or a stronger one, mostly lethal, in the larval or pupal stage. Weak Frd, indicated as [Frd], is transmitted indefinitely without any recognizable linkage with the chromosomes, although its frequency is influenced by the 1st and, probably, by the 3rd chromosome. No matroclinous transmission has been found. It is concluded that [Frd] is probably controlled by an extrachromosomal entity, not located in the cytoplasm. The possible relationships between Frd and [Frd] are discussed.

Type
Research Article
Information
Genetics Research , Volume 11 , Issue 2 , April 1968 , pp. 141 - 150
Copyright
Copyright © Cambridge University Press 1968

References

REFERENCES

Bairati, A. (1964). L'organo dell'emolinfa nella larva di D. melanogaster in ceppi portatori di tumori melanotici. IV Congr. Soc. Ital. Micr. Elettr. Ed. Seminario, Padova, pp. 114–118.Google Scholar
Barigozzi, C. (1963). Relationship between cytoplasm and chromosome in the transmission of melanotic tumours in Drosophila. In Biological Organization at the Cellular and Supercellular Level, pp. 73–89. London and New York: Academic Press.Google Scholar
Beale, G. H. & McPhail, S. (1967). Some additional results on the maintenance of kappa particles in Paramecium aurelia (stock 51) after loss of the gene K. Genet. Res. 9, 369–373.CrossRefGoogle ScholarPubMed
Ehrlich, E. (1963). Drosoph. Inf. Serv. 37, 47.Google Scholar
Halfer, C., Piccinelli, M. & Torri, Tarelli L. (1965). Manifestazioni melanotiche e loro sviluppo nel ceppo Frd (D. melanogaster). 1st. Lomb. Sci. Lett. 99, 221–242.Google Scholar
Perotti, E. & Bairati, A. (1967). Ultrastructure of the melanotic masses in two tumorous strains of D. melanogaster (tu B3 and Frd). J. Invertebrate Path, (in the Press).Google Scholar