|Feature type||allele||Associated gene||Dmel\pum|
|Also Known As||pumET1|
|Allele class||loss of function allele|
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|Nature of the Allele|
|Mutations Mapped to the Genome|
|Associated Sequence Data|
|Nature of the lesion|
|Phenotype Manifest In|
dendritic arborising neuron & dendrite | somatic clone
Trans-heterozygotes of pum/pum, pum/pum[Msc] and pum/pum display extra wing veins. The penetrance of the pum/pum phenotype is incomplete. Trans-heterozygotes of pum/pum[Msc] display extra macrochaetae on their notum. The penetrance of the phenotype is incomplete.
Homozygous germ line stem cell (GSC) clones are rapidly lost from the adult ovary; GSC loss is seen as early as 4 days after clone induction, and by the 6th or 7th day after clone induction, most ovarioles do not contain a mutant GSC.
Third larval instar class I or class II dendritic arborization neurons which are mutant for pum1 (generated using the MARCM technique) do not show an alteration in dendrite morphology, as assessed by total length of dendrites and quantitation of dendritic order. Third larval instar class III dendritic arborization neurons which are mutant for pum1 (generated using the MARCM technique) have significantly elongated dendritic spikes, but the order of dendrites and the length of major dendritic branches is indistinguishable from wild type. Third larval instar class IV dendritic arborization neurons which are mutant for pum1 (generated using the MARCM technique) show a defect in their dendrites; incomplete coverage of the epidermis is seen in about 15% of the mutant neurons (wild-type neurons cover the epidermis in a complete but non-overlapping fashion), due to a reduction of higher-order branches.
Homozygous female germline clones induced at the third larval instar stage produce "differentiated" ovarioles that on average 2.2 +/- 1.5 mature egg chambers. Females containing homozygous female germline clones achieve an oviposition efficiency of 78% (for absolute number of eggs laid by the females). The eggs show posterior patterning defects and fail to hatch.
pum1/In(3R)ScrMsc mutant females lay some eggs during their first week of life, by 10 days after eclosion the ovaries are completely depleted of germline. 18 days after eclosion some of the now germline-less germaria appear swollen, by 35 days after eclosion some ovarioles have become massively tumorous. The tumours are somatic, rather than germline in origin. Tumours are also seen in ovarioles that have not lost their germline and not in ovarioles that have. Transplantation of wild type germ cells can rescue the pum ovary phenotype.
|Phenotype Manifest In|
|NOT suppressed by|
The reduction in high-order dendritic branches seen in class IV dendritic arborization neurons of third instar larvae expressing nosαTub84B.3'UTR.Scer\UAS under the control of Scer\GAL4477 is not as extreme if the larvae are also homozygous for pum1. Third larval instar class I dendritic arborization neurons of third instar larvae which are mutant for both pum1 and nos18 (generated using the MARCM technique) do not have any defects in dendrite morphology. Third larval instar class III dendritic arborization neurons which are mutant for both pum1 and nos18 (generated using the MARCM technique) show an increase in the number of long dendritic spikes to a similar extent as that seen in the single mutant class III dendritic arborization neurons. Third larval instar class IV dendritic arborization neurons which are mutant for both pum1 and nos18 (generated using the MARCM technique) show incomplete innervation of the epidermal territory in about 18% of neurons, an extent similar to that seen in the single mutant class IV dendritic arborization neurons.
|Complementation & Rescue Data|
|Stocks ( 0 )|
|Notes on Origin|
|External Crossreferences & Linkouts|
|Synonyms & Secondary IDs ( 2 )|
|Secondary FlyBase IDs|
|References ( 14 )|