UbxMX12 abd-AM1 Abd-BM8 triple mutant embryos exhibit a normal head and anterior thorax, but the third thoracic segment and all the abdominal segments are transformed into the second thoracic segment. Embryos also develop a pair of sclerotic plates in the posterior part of the A8 segment. Heat activation of abd-Ahs.PS transforms the cephalic, thoracic and first abdominal segment into A2-A6 identity. The posterior abdomen exhibits transformation of A8 to the A2-A6 identity and presence of an extra belt in A9.
The second thoracic to the seventh abdominal segment develop as a composite of compartments from two segments. The identity of the eighth abdominal segment is complex: the anterior has characteristics of prothoracic and mesothoracic segments and the posterior may be cephalic. Ubx- embryos have an abnormal pattern of Ba expression at the extended germ band stage: Keilin's organs develop in the abdominal segments due to ectopic expression of Ba.
AntpNs-rvC3, ScrC1, UbxMX12 has abnormal neuroanatomy | somatic clone phenotype
AntpNs-rvC3, ScrC1, UbxMX12 has motor neuron | somatic clone | third instar larval stage phenotype, suppressible by Scer\GAL4VGlut1-OK371/Scer\GAL4Tub.PU/BacA\p35UAS.cHa
AntpNs-rvC3, ScrC1, UbxMX12 has glial cell | third instar larval stage phenotype, non-suppressible by Scer\GAL4VGlut1-OK371/Scer\GAL4Tub.PU/BacA\p35UAS.cHa
AntpNs-rvC3, ScrC1, UbxMX12 has motor neuron | somatic clone | adult stage phenotype
AntpNs-rvC3, ScrC1, UbxMX12 has motor neuron | somatic clone | third instar larval stage phenotype
AntpNs-rvC3, ScrC1, UbxMX12 has glial cell | third instar larval stage phenotype
AntpNs-rvC3, ScrC1, UbxMX12 has dendrite & dorsal multidendritic neuron ddaC | somatic clone phenotype
AntpNs-rvC3, ScrC1, UbxMX12 has dendrite & dendritic arborising neuron | somatic clone phenotype
AntpNs-rvC3, ScrC1, UbxMX12 has axon & dendritic arborising neuron | somatic clone phenotype
Abd-BS10, UbxMX12 has abdominal segment 7 phenotype
Abd-BS10, UbxMX12 has abdominal segment 5 phenotype
Abd-BS10, UbxMX12 has abdominal segment 6 phenotype
The number of LinA-derived neurons is dramatically reduced compared to wild type in ScrC1 AntpNs-rvC3 UbxMX12 triple mutant clones examined at the late third instar larval stage. This phenotype is seen in all three thoracic segments. The number of glia derived from the triple mutant LinA neuroblast clones is also reduced compared to wild type.
Adult motor neurons derived from ScrC1 AntpNs-rvC3 UbxMX12 triple mutant LinA neuroblast clones target the same region of the leg as do wild-type LinA-derived neurons. However, fewer branches are observed compared with wild-type clones, with the distal region of the tibia being most highly affected.
Single cell class IV dendrite arborisation (da) neuron clones that are triply mutant for ScrC1, AntpNs-rvC3, UbxMX12 show severe defects in dendrite growth, branching and coverage in segment T3 as well as axon fasciculation defects. Analysis of ScrC1, AntpNs-rvC3, UbxMX12 triple mutant ddaC neuron clones indicates that although the major dendrites of the mutant neurons grow to a similar extent as wild-type controls in the interval between 80 and 96 hours after egg laying, the mutant clones have an increased number of terminal dendrites compared to controls. The mutant clones also show increased dynamic behaviour over this time period compared to controls, due to increased dendrite branch initiation/growth. The number of dendrite retractions is not altered in the mutant neurons.
Expression of BacA\p35Scer\UAS.cHa under the simultaneous control of both Scer\GAL4VGlut-OK371 and Scer\GAL4tub.PU rescues the reduced number of LinA-derived neurons seen in ScrC1 AntpNs-rvC3 UbxMX12 triple mutant clones examined at the late third instar larval stage. The reduction in number of glia derived from the triple mutant LinA neuroblast clones is not rescued.
Expression of BacA\p35Scer\UAS.cHa under the simultaneous control of both Scer\GAL4VGlut-OK371 and Scer\GAL4tub.PU partially rescues the defects seen in adult motor neurons of the leg derived from ScrC1 AntpNs-rvC3 UbxMX12 triple mutant LinA neuroblast clones.