veloe01260 mutants display projection neuron dendrite targeting defects.
veloe01260 mutant neuroblast clones exhibit several defects. First, the number of neurons is reduced from an average of 35 ad projection neurons in wild-type to 5 neurons in veloe01260 mutant clones. Second, the overall dendritic mass is reduced and disorganised Third, dendrites aberrantly innervate the wrong glomeruli within the antennal lobe, or ectopically project outside the antennal lobe.
veloe01260 mutant DL1 projection neurons exhibit defects in axon morphology. Axons extend as wild-type and always reach the end of the lateral horn, but only form 0-2 collaterals in the mushroom body calyx, and often have a missing or shorter dorsal branch in the lateral horn. These axonal phenotypes are independent of the phenotypic class of dendrite mistargeting.
In veloe01260 mutant neuroblast clones projection neuron cell numbers are drastically reduced from ~35 neurons in wild-type to an average of 5.5 neurons.
veloe01260 has abnormal neuroanatomy | somatic clone phenotype, suppressible by piraUAS.Tag:HA/Scer\GAL4GH146
veloe01260 has abnormal neuroanatomy | somatic clone phenotype, suppressible by Ulp1UAS.Tag:HA/Scer\GAL4GH146
veloe01260 has adult antennal lobe projection neuron DL1 adPN | somatic clone phenotype, suppressible by piraUAS.Tag:HA/Scer\GAL4GH146
veloe01260 has antennal lobe glomerulus DL1 | somatic clone phenotype, suppressible by piraUAS.Tag:HA/Scer\GAL4GH146
veloe01260 has dendrite | somatic clone phenotype, suppressible by piraUAS.Tag:HA/Scer\GAL4GH146
veloe01260 has adult antennal lobe projection neuron DL1 adPN | somatic clone phenotype, suppressible by Ulp1UAS.Tag:HA/Scer\GAL4GH146
veloe01260 has antennal lobe glomerulus DL1 | somatic clone phenotype, suppressible by Ulp1UAS.Tag:HA/Scer\GAL4GH146
veloe01260 has dendrite | somatic clone phenotype, suppressible by Ulp1UAS.Tag:HA/Scer\GAL4GH146
Expression of CG12717Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4GH146 suppresses the DL1 projection neuron mistargeting phenotype found in veloe01260 mutants. However, veloe01260 mutant axon phenotypes cannot be reverted by CG12717Scer\UAS.T:Ivir\HA1 expression.
Expression of Ulp1Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4GH146 suppresses the DL1 projection neuron mistargeting phenotype found in veloe01260 mutants. However, veloe01260 mutant axon phenotypes cannot be reverted by CG12717Scer\UAS.T:Ivir\HA1 expression.
The number of veloe01260 mutant neuroblast clone projection neuron cells is increased upon Ulp1Scer\UAS.T:Ivir\HA1 or CG12717Scer\UAS.T:Ivir\HA1 expression (under the control of Scer\GAL4GH146). However, the overall number is still lower than in wild-type.
veloe01260 is not rescued by veloC1624S.UAS.Tag:HA/Scer\GAL4GH146
Based on dendrite targeting defects in the antennal lobe, the following velo alleles can be ranked from most severe to weakest as follows: veloe01260 > veloLL05209 > veloLL05207.