P{etau-lacZ} is inserted between nucleotides 449 and 450 (where the drl transcription start site is at nucleotide 487). The insertion sites of P{etau-lacZ}drlP3.765 and P{lacW}pigeonP1 are identical.
The P{etau-lacZ}drlP3.765 insertion in drlP3.765 is inserted at the same nucleotide as the P{lacW}pigeonP1 insertion.
P{lacW}pigeonP1 is inserted 6bp distal to P{etau-lacZ}drlP3.765. In both cases the element is transcribed in the opposite direction to the pigeon and drl transcription units.
P{etau-lacZ} insertion 47bp upstream from the 5' end of the longest drl cDNA.
drlP3.765 is expressed in a transient glial structure called the 'transient interhemispheric fibrous ring' (TIFR) that persists into early pupal stages but disappear by adulthood.
Homozygous adults show defects in the mushroom bodies and central complex.
drlP3.765/drlR343 adults have brain defects. The fan-shaped body is distorted on its dorsal side, where axonal structures replace cell bodies. The α lobes of the mushroom bodies are reduced and the β lobes are fused or juxtaposed. The transient interhemispheric ring (TIFR) - a transient ring of cell projections at the interhemispheric junction in the middle of the brain shows defects in drlP3.765/drlR343 old larvae and young pupae.
Homozygous embryos show partial defasciculation of axons in the CNS which normally express drl.
Homozygous embryos are sluggish and uncoordinated and exhibit neuronal pathfinding defects. The drl neurons cross the midline and reach the contralateral longitudinal connective but they project anteriorly along inappropriate paths and thus fail to form the distinctive DD and DV bundles. In many segments drl neurons can be seen crossing one another and appear less organised within the anterior commissure. drlP3.765/drlR343 transheterozygotes display a similar phenotype to drlP3.765 homozygotes, yet drl neurons of transheterozygotes with drlR193 display wild type pathfinding.
cas3921, drlP3.765 has partially lethal phenotype
drlP3.765 has adult mushroom body beta'-lobe phenotype, enhanceable by cas3921
drlP3.765 has adult mushroom body beta-lobe phenotype, enhanceable by cas3921
drlP3.765 has adult brain phenotype, enhanceable by cas3921
drlP3.765 has ellipsoid body phenotype, enhanceable by cas3921
drlP3.765 has mushroom body phenotype, enhanceable by cas3921
Nrt5, drlP3.765 has axon | embryonic stage phenotype
drlP3.765/drlP3.765; Nrt5/Nrt5 and drlP3.765/Df(2L)TW130; Nrt5/Nrt5 embryos show strong misguidance and stalling phenotypes in many hemisegments of axons that normally express drl. In addition, defects are seen in axons that do not normally express drl. Defects in Fas2 expressing axons, associated with the defects in drl expressing axons are also seen. These defects are rescued by NrtScer\UAS.cSa expressed under the control of Scer\GAL4Mz1277.
The P{etau-lacZ}drlP3.765 insertion in drlP3.765 is inserted at the same nucleotide as the P{lacW}pigeonP1 insertion.
Reversion of the P{etau-lacZ} insertion demonstrates this to be the cause of the neuronal phenotype.