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Mech Dev. 1997 Feb;62(1):93-101.

Adepithelial cells in Drosophila melanogaster: origin and cell lineage.

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Institut für Allgemeine Zoologie und Genetik der Westfälischen Wilhelms-Universität, Münster, Germany.


We have analysed the cell lineage relationships between larval and imaginal mesodermal primordia at the blastoderm stage by homotopic single cell transplantations. The primordia of adepithelial cells, the precursors of adult thoracic muscles, are restricted to the region from 50 to 65% egg length within the ventrally located mesodermal anlage. Clones of adepithelial cells always show a common cell lineage with larval muscles and in some cases additionally with larval fat body. This proves that at the blastoderm stage the determination of larval vs. imaginal mesodermal primordia has not yet taken place. Larval somatic muscle clones, in contrast to clones in the ectoderm, can overlap several segments, whereas clones of adepithelial cells are always restricted to imaginal discs of one segment.

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