microchaeta & wing
prothoracic leg & sex comb
wing vein L3 & macrochaeta
The induction of pbhs.PB occasionally exhibit an ectopic distal sex comb on the T1 leg.
Flies expressing pbhs.PB show a progressive transformation of antennae to maxillary palps as the copy number of P{HSPB} elements is increased. The transformation does not affect the most proximal antennal tissues, and acts differentially along the proximo-distal axis, from proximal toward distal. Flies carrying two copies of pbhs.PB show loss of many distal, but not proximal, wing margin mechanosensory bristles. This phenotype is enhanced by HDMu4.
Flies carrying pbhs.PB show a fully penetrant, dose-sensitive dominant transformation of antennae towards maxillary palps in the absence of heat shock.
Uninduced expression causes antenna to maxillary palps transformation. Subtle dose-sensitive defects are also observed in the eyes, posterior head, prothoracic legs and wings. Two copies of the insertion cause reduction or loss of the ventral aspect of the adult eye, a frequent change in ommatidial geometry, from hexagonal to tetragonal, in remaining ommatidia and duplication of some interommatidial bristles. Hemizygous males have normal eyes.
Flies expressing a single copy of pbhs.PB at a basal level (in the absence of heat shock) show a partial transformation of antennae to maxillary palps. Approximately 10% of females and 2% of males have an ectopic bristle on the distal end of wing vein L3. Flies carrying two copies of pbhs.PB show a nearly complete antenna to maxillary transformation.
Heat induced expression does not affect tarsal leg structures but causes some thickening of the arista.
Dose sensitive dominant transformation of antenna towards maxillary palps with 100% penetrance, this phenotype can be induced in the absence of heat shock.
Uninduced expression of pbhs.PB causes a novel, fully penetrant dominant transformation of antennal segment 3 and the aristae towards maxillary palps. Antennal segment 2 is perturbed but not explicitly transformed. Transformation of the arista can be augmented by altering the culture temperature from 22oC to 29oC. In general flies exhibit reduced viability and mobility. Dose sensitive effects were noticed for prothoracic legs (ectopic and perturbed sex combs), head capsule (malformed outer vertical bristles, reduction of the anterior aspect of the eye) and wings (loss or alteration of the anterior wing margin bristles, and formation of microchaetae at the distal extremity of wing vein L3). Overexpression by heat induction does not generate marked increase in adult cuticular phenotypes.
pbhs.PB has visible phenotype, enhanceable by RasGAP1sxt-BJ61
RasGAP1sxt-BJ61, pbhs.PB/pb[+] has visible phenotype, suppressible by Ras85De1B/Ras85D[+]
RasGAP1sxt-BJ61, pbhs.PB has visible phenotype, suppressible by Ras85De1B/Ras85D[+]
pbhs.PB is an enhancer of visible phenotype of RasGAP1sxt-BJ61
Ras85De1B, RasGAP1sxt-BJ61, pbhs.PB/pb[+] has visible phenotype
Df(3R)by10, pbhs.PB has visible | dominant phenotype
Df(3R)by416, pbhs.PB has visible | dominant phenotype
Df(3R)GB104, pbhs.PB has visible | dominant phenotype
pbhs.PB has prothoracic leg | distal phenotype, enhanceable by skdpap-53
pbhs.PB has wing sensillum phenotype, enhanceable by HDMu4
pbhs.PB has antenna phenotype, enhanceable by RasGAP1sxt-BJ61
pbhs.PB, skdpap-53 has prothoracic leg | distal phenotype, suppressible by Scr4
pbhs.PB has prothoracic leg | distal phenotype, suppressible by Scr4
RasGAP1sxt-BJ61, pbhs.PB/pb[+] has antenna phenotype, suppressible by Ras85De1B/Ras85D[+]
RasGAP1sxt-BJ61, pbhs.PB/pb[+] has wing vein phenotype, suppressible by Ras85De1B/Ras85D[+]
RasGAP1sxt-BJ61, pbhs.PB has antenna phenotype, suppressible by Ras85De1B/Ras85D[+]
RasGAP1sxt-BJ61, pbhs.PB has wing vein phenotype, suppressible by Ras85De1B/Ras85D[+]
pbhs.PB is an enhancer of wing vein phenotype of RasGAP1sxt-BJ61
pbhs.PB, taraL4 has wing vein L5 phenotype
pbhs.PB, taraL4 has wing vein L4 phenotype
pbhs.PB, skdpap-53 has prothoracic leg | distal phenotype
HE31, Ras85De1F, pbhs.PB has wing vein L5 phenotype
HE31, Ras85De1F, pbhs.PB has wing vein L4 phenotype
HE31, Ras85De1F, pbhs.PB has campaniform sensillum of dorsal radius phenotype
Ras85De1B, RasGAP1sxt-BJ61, pbhs.PB/pb[+] has wing vein phenotype
Ras85De1B, RasGAP1sxt-BJ61, pbhs.PB/pb[+] has antenna phenotype
Ras85De1B, pbhs.PB has wing vein L5 phenotype
Ras85De1B, pbhs.PB has wing vein L3 phenotype
Ras85De1B, pbhs.PB has wing vein L4 phenotype
Df(3R)by10, pbhs.PB has antenna phenotype
Df(3R)by416, pbhs.PB has antenna phenotype
Df(3R)GB104, pbhs.PB has antenna phenotype
pbhs.PB, ssa40aw has tarsal segment phenotype
pbhs.PB, ssa40aw has antennal segment phenotype
AntpB, pbhs.PB has maxillary palp | ectopic phenotype
AntpR, pbhs.PB has maxillary palp | ectopic phenotype
AntpRM, pbhs.PB has maxillary palp | ectopic phenotype
AntpWu, pbhs.PB has maxillary palp | ectopic phenotype
AntpCB, pbhs.PB has maxillary palp | ectopic phenotype
AntpCtx, pbhs.PB has maxillary palp | ectopic phenotype
AntpW, pbhs.PB has maxillary palp | ectopic phenotype
AntpDC, pbhs.PB has maxillary palp | ectopic phenotype
AntpPW, pbhs.PB has maxillary palp | ectopic phenotype
Shows a dose-sensitive interaction with Df(2L)net-PMF, Df(2L)30A-C, Df(2L)TW50, Df(2R)en30, Df(2R)PC4, Df(3L)GN24, Df(3L)AC1, Df(3R)by10, Df(3R)by416, Df(3R)GB104, Df(3R)P115 and Df(3R)L127. Does not interact with Df(3R)by62. Df(3R)by10, Df(3R)by416 and Df(3R)GB104 reduce the antennal to maxillary transformation caused by pbhs.PB. pbhs.PB Ras85De1B double heterozygotes have a partially penetrant truncation of wing veins L4 and L5, and the frequency of ectopic bristle formation on the distal end of wing vein L3 (seen in pbhs.PB heterozygotes) is increased to 90% for females and 50% for males. pbhs.PB Df(3L)AC1 double heterozygotes show a very weak modification of the pbhs.PB wing phenotype. Gap1sxt-BJ61 enhances the antenna to maxillary transformation in pbhs.PB/+ Gap1sxt-BJ61/Gap1sxt-BJ61 flies. This enhancement is reduced if the flies also carry one copy of Ras85De1B. Enhances the ectopic wing vein phenotype seen in Gap1sxt-BJ61 homozygotes. This enhancement is reduced if the flies also carry one copy of Ras85De1B.
Induction of expression in ssa40aw flies causes shortening of the distal parts of the tarsus, mostly in the antennae, legs are less affected.
Rescues the phenotype of recessive pb mutations.
Elevated temperatures supplement the level of expression of this allele. Attempts to generate a fly containing three copies have been unsuccessful.
Flies carrying pbhs.PB have been used in a genetic screen for dominant modifiers of pb function.