FB2026_02 , released June 18, 2026
Allele: Dmel\Ibf2GSV17
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General Information
Symbol
Dmel\Ibf2GSV17
Species
D. melanogaster
Name
FlyBase ID
FBal0295808
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Key Links
Nature of the Allele
Associated Insertion(s)
Cytology
Description

Mobilization of P{GSV6}Ibf2GS16482, resulting in loss of the w gene from the transposon sequences but retention of part of the transposon that renders the Ibf2 gene nonfunctional.

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

Homozygotes and hemizygotes with Df(3R)ED5339 show reduced viability (60-70%), male sterility and many of the eclosed flies are short-lived.

70% of Ibf2GSV17 homozygous adult females exhibit loss of bristle formation in the A7 sternite - bristles resemble those normally found in more anterior sternites. 14% of Ibf2GSV17 heterozygotes and 72% of Ibf2GSV17/Df(3R)ED5339 transheterozygotes also show this phenotype.

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Phenotype Manifest In
Additional Comments
Genetic Interactions
Statement
Reference

Heterozygosity for Ibf2GSV17 increases the eye pigmentation in w+mC.Fab-8 flies (in a w[-] background). Homozygosity for Ibf2GSV17 increases eye pigmentation still further.

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Comments
Images (0)
Mutant
Wild-type
Stocks (0)
Notes on Origin
Discoverer
Comments
Comments

Ibf2GSV17 behaves as a double Ibf1, Ibf2 null mutation regarding chromatin regulation, as Ibf1 protein is unable to bing chromatin in the absence of Ibf2.

External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (1)
Reported As
Symbol Synonym
Name Synonyms
Secondary FlyBase IDs
    References (1)