Summary
The transdetermination capacities of leg discs ofDrosophila melanogaster were examined by mechanically disrupting and kneading whole discs from late third instar larvae and by culturing the resulting tissue mass for 10–14 days in adult female abdomens where the cells continued to divide. The grown implants were then dissected from the abdomens and injected into third instar larvae to undergo metamorphosis.
After this treatment, prothoracic leg discs ofDrosophila melanogaster transdetermined with a high frequency (59% of all implants) to wing. Mesothoracic leg discs also transdetermined to wing, but at a very low frequency (4%). Metathoracic leg discs exhibited the same low frequency of transdetermination (4%), but in this case the direction of transdetermination was to haltere (Table 1,D. melanogaster).
Very similar results were obtained with leg discs ofDrosophila nigromelanica (Table 1,D. nigromelanica), showing that the peculiar behavior of the three leg discs is not unique forDrosophila melanogaster.
The homeotic mutation Polycomb (Pc 3) which partially transforms meso- and metathoracic legs into prothoracic legs did not significantly increase the frequencies of transdetermination in these leg dises and had clearly no effect on the direction of transdetermination (Table 1).
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We dedicate this publication to the memory of our teacher and advisor, the late Professor Ernst Hadorn, whose enthusiasm and interest stimulated our work
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Steiner, E., Koller-Wiesinger, M. & Nöthiger, R. Transdetermination in leg imaginal discs ofDrosophila melanogaster undDrosophila nigromelanica . Wilhelm Roux' Archiv 190, 156–160 (1981). https://doi.org/10.1007/BF00867802
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DOI: https://doi.org/10.1007/BF00867802