Summary
The bristle pattern along the first longitudinal vein of the wing ofD. hydei differs from that ofD. melanogaster. Instead of a triple row,D. hydei and some allied species show a pattern of five parallel bristle rows of which the medial row (MR) is comparable to the medial triple row (MTR) ofD. melanogaster. Cells of the MR can be made homozygousyellow (y) by induction of mitotic recombination in heterozygousy/y + females. Until 70 h after egg laying (AEL), the MR clones inD. hydei overlap with one or more of the accompanying dorsal and ventral bristle rows. Between 70 and 120 h AEL the MR clones only overlap with dorsal bristle rows. Some time later they also become separated from both dorsal rows. The resulting MR clone pattern fits with the overall longitudinal clone pattern in the wing blade ofD. melanogaster described by Bryant (1970) and others. The MR clones inD. hydei, however, often show a fragmented appearance with many indentations of the surroundingy + tissue even when induced after fixation of the DV compartment boundary. This result contrasts with the commonly held notion, derived from work withD. melanogaster, that compartment boundaries are smooth lines.
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van Breugel, F.M.A., Grond, C. Bristle patterns and clones along a compartment border in the anterior wing margin ofDrosophila hydei . Wilhelm Roux' Archiv 188, 195–200 (1980). https://doi.org/10.1007/BF00849048
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DOI: https://doi.org/10.1007/BF00849048