Deletion of sequences from 0 to 19kb (coordinates with respect to proximal end of a cloned l(2)gl region, close to the tip of 2L).
larval brain | posterior & neuroblast | supernumerary
larval brain | posterior & neuron
l(2)gl1 mutants show an overproliferation of central brain neuroblasts in the posterior half of the brain and a concomitant reduction in the amount of neurons. The proliferation begins in the mid-third larval instar and increases dramatically during the late-third instar. Neuroblasts in the anterior half of the brain appear normal in number and spacing.
By the extended germband stages, the epithelia of embryos from l(2)gl1 germ-line clone mothers loose their regular arrangement as epithelial cells round up.
The brain-ventral ganglion complexes of mutant larvae over 5 days old have brain hemispheres which are abnormal in size and morphology. Neuroblastomas of the optic lobes of the brain ganglia and tumourous imaginal discs are present in the mutant larvae.
90% of mutants die as larvae, 2% as pupae. Extreme allele: larval brain and optic lobes become enlarged and disorganised and the imaginal discs are large and clumped. Discs of mutant larvae transplanted into wild-type female abdomens form large contained tumours, whereas transplanted optic primordia from larval brains form invasive neuroblastomas, which grow rapidly, killing the host within 7-14 days. These tumours can be serially cultured in adult abdomens.
l(2)gl1/l(2)gl4 has abnormal neuroanatomy phenotype, enhanceable by Scer\GAL4insc-Mz1407/bazUASp.GFP
l(2)gl1/l(2)gl4 has abnormal neuroanatomy phenotype, enhanceable by numb[+]/numb15
l(2)gl1/l(2)gl4 has abnormal size | third instar larval stage phenotype, suppressible by park1
l(2)gl1/l(2)gl4 has abnormal neuroanatomy phenotype, suppressible by Scer\GAL4insc-Mz1407/bazGD1384
l(2)gl1/l(2)gl4 has abnormal neuroanatomy phenotype, suppressible | partially by numb[+]/numbS52F
l(2)gl1/l(2)gl4 has larval neuroblast phenotype, enhanceable by Scer\GAL4insc-Mz1407/bazUASp.GFP
l(2)gl1/l(2)gl4 has larval brain | larval stage phenotype, enhanceable by Scer\GAL4insc-Mz1407/bazUASp.GFP
l(2)gl1/l(2)gl4 has larval neuroblast phenotype, enhanceable by numb[+]/numb15
l(2)gl1/l(2)gl4 has larval brain | larval stage phenotype, enhanceable by numb[+]/numb15
l(2)gl1/l(2)gl4 has brain | third instar larval stage phenotype, suppressible by park1
l(2)gl1/l(2)gl4 has larval neuroblast phenotype, suppressible by Scer\GAL4insc-Mz1407/bazGD1384
l(2)gl1/l(2)gl4 has larval brain | larval stage phenotype, suppressible by Scer\GAL4insc-Mz1407/bazGD1384
l(2)gl1/l(2)gl4 has larval neuroblast phenotype, suppressible | partially by numb[+]/numbS52F
l(2)gl1/l(2)gl4 has larval brain | larval stage phenotype, suppressible | partially by numb[+]/numbS52F
The overproliferation of larval brain neuroblasts seen in l(2)gl1/l(2)gl4 animals is enhanced by expression of bazScer\UAS.P\T.T:Avic\GFP under the control of Scer\GAL41407.
The overproliferation of larval brain neuroblasts seen in l(2)gl1/l(2)gl4 animals is completely suppressed by expression of bazGD1384 under the control of Scer\GAL41407.
The overproliferation of larval brain neuroblasts seen in l(2)gl1/l(2)gl4 animals is enhanced by numb15/+ and is weakly suppressed by numbS52F/+.
l(2)gl1 is rescued by Scer\GAL4pros.PMG/l(2)glUAS.cBa
l(2)gl1 is rescued by Scer\GAL4da.G32/l(2)glUAS.Tag:MYC
l(2)gl1 is not rescued by Scer\GAL4pros.PMG/l(2)glMC.UAS.Tag:MYC
l(2)gl1 is not rescued by Scer\GAL4pros.PMG/l(2)glC+β.UAS.Tag:MYC
l(2)gl1 is not rescued by l(2)glM.UAS.Tag:MYC/Scer\GAL4pros.PMG
l(2)gl1 is not rescued by Scer\GAL4pros.PMG/l(2)glN.UAS.Tag:MYC
l(2)gl1 is not rescued by Scer\GAL4da.G32/l(2)gl3A.UAS.Tag:MYC
l(2)glScer\UAS.T:Hsap\MYC; Scer\GAL4da.G32 rescues the epithelial polarity defects seen in embryos from l(2)gl1 germ-line clone mothers but l(2)gl3A.Scer\UAS.T:Hsap\MYC; Scer\GAL4da.G32 fails to rescue this phenotype.
Bridges, 9th May 1933.