FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Allele: Dmel\forlsR92
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General Information
Symbol
Dmel\forlsR92
Species
D. melanogaster
Name
FlyBase ID
FBal0043076
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
forl(92)
Key Links
Allele class
Mutagen
Nature of the Allele
Allele class
Cytology

Polytene chromosomes normal.

Description
Mutations Mapped to the Genome
Curation Data
Type
Location
Additional Notes
References
Variant Molecular Consequences
Associated Sequence Data
DNA sequence
Protein sequence
 
Expression Data
Reporter Expression
Additional Information
Statement
Reference
 
Marker for
Reflects expression of
Reporter construct used in assay
Human Disease Associations
Disease Ontology (DO) Annotations
Models Based on Experimental Evidence ( 0 )
Disease
Evidence
References
Modifiers Based on Experimental Evidence ( 0 )
Disease
Interaction
References
Comments on Models/Modifiers Based on Experimental Evidence ( 0 )
 
Disease-implicated variant(s)
 
Phenotypic Data
Phenotypic Class
Phenotype Manifest In
Detailed Description
Statement
Reference

Large amplitude (up to 5nA) spontaneous ejcs occur at high frequency, evoked ejcs that are time-locked to the stimulus show significantly greater amplitude. TTX suppresses the large spontaneous ejcs and supernumerary discharges after the time-locked evoked ejc, but not the spontaneous mini ejcs, indicating that enhanced nerve excitability plays a role in the asynchronous synaptic discharge in sitter mutants. The number of ectopic nerve points in the muscles of fors, fors2 and forlsR92 correlates with excitability levels of both central neurons and motor axons.

Larvae homozygous for the "sitter" alleles fors or forlsR92 move equally as well as larvae homozygous for the "rover" forR allele on non-nutritive substrates. Larvae homozygous for the forR allele take more strides, not longer ones, than larvae carrying fors or forlsR92 on foraging substrates.

Homozygous or forlsR92/fors larvae have a "sitter" phenotype. forlsR92/forR larvae have a "rover" phenotype. Homozygotes die after the grey wing stage of pupal development.

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Phenotype Manifest In
Additional Comments
Genetic Interactions
Statement
Reference
Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Fails to complement
Comments

Fails to complement the increased olfactory trap response of fors2 adults.

Images (0)
Mutant
Wild-type
Stocks (0)
Notes on Origin
Discoverer
Comments
Comments

The differences in larval locomotion during foraging in larvae carrying different alleles of the for locus cannot be explained on the basis of muscle usage alone, and it is more likely that for affects larval ability to perceive or respond to the foraging environment.

External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (5)
Reported As
Name Synonyms
Secondary FlyBase IDs
    References (5)