FB2026_02 , released June 18, 2026
Allele: Dmel\fruw27
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General Information
Symbol
Dmel\fruw27
Species
D. melanogaster
Name
FlyBase ID
FBal0057427
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Key Links
Allele class
Mutagen
Nature of the Allele
Allele class
Caused by aberration
Cytology
Description

Southern analysis indicates a lesion within a 4kb HindIII fragment at the 5' end of the w gene in the P{wAR}fru0-1 element. RT-PCR analysis suggests that there is a breakpoint between the P2 and P3 promoters of fru.

Breakpoint maps to a 2.8kb BamHI-HindIII fragment at the 5' end of the w gene of the P{wAR} insertion of fru0-1.

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
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Marker for
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Human Disease Associations
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Disease
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Modifiers Based on Experimental Evidence ( 0 )
Disease
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Disease-implicated variant(s)
 
Phenotypic Data
Phenotypic Class
Phenotype Manifest In
Detailed Description
Statement
Reference

53% of fruAJ96u3/fruw27 animals can emerge if dissected from the pupal case. These flies have a number of defects including uneverted discs, uninflated wings, abnormal wing position, defective leg joints and duplicated anterior scutellar or sternopleural bristles.

1-2% fruw12/fruw27 adult escapers are seen. 5% frusat15/fruw27 adult escapers are seen. 0.1% fruw9/fruw27 adult escapers are seen. 3% of fruw27/fruM5 males are fertile. Male-female courtship as measured by courtship index (CI) or wing extension index (WEI) is almost completely abolished in fruw12/fruw27 or fru4-40/fruw27 males. Male-female courtship as measured by courtship index (CI) or wing extension index (WEI) is almost completely abolished in fru3/fruw27 or fru4/fruw27 males. Male-female courtship as measured by wing extension index (WEI) is almost completely abolished in fru0-1/fruw27 males. fru1/fruw27 males show significantly more male-male courtship and less frequent male-female courtship than wild-type males. fruw27/fru1 or fruw27/fru4 males show substantial chaining. fruw27/fruM5 or fruw27/fru4-40 males show substantial chaining. Heterozygous males generate a normal courtship song except that the width of the fast-Fournier transform is smaller than in wild-type males. fru3/fruw27 and fru4-40/fruw27 males do not produce a courtship song even though they show a small amount of wing extension. fru1/fruw27 males have a courtship song with longer interpulse intervals, but essentially normal intrapulse frequencies, cycles per pulse and width of the fast-Fourier transform compared to control males. fruw12/fruw27 animals are able to emerge if dissected from the pupal case. These animals perform posteclosion behaviours such as wing and proboscis expansion but are unable to fully extend their wings, which project from the body at a 70-90o angle. The tibial segment may be bent. Leg joint defects and duplicated bristles are seen. fruw27/Df(3R)fruw24 adults that have been dissected from the pupal case show minor external defects, such as uninflated wings, wings held at a 70-90o angle to the body, leg joint defects and duplicated bristles. Abdominal motorneurons of fruw12/fruw27 animals produce fewer lateral terminal arborisations as they terminate on lateral muscles compared to wild type. Abdominal motorneurons of fruw27/Df(3R)fruw24 animals produce fewer terminal branches compared to wild type. Abdominal muscle innervation appears normal in fruw27/fruM5 adults. The number and pattern of divisions of larval neuroblasts in the thoracic ganglia or brain appears normal in fruw27/Df(3R)fruw24 animals.

fruw27/fruw12 mutants are nearly lethal during late pupal stages.

Transheterozygotes with fruw12 or Df(3R)fruw24 are lethal, 2% fruw12/fruw27 transheterozygotes survive to adulthood. fruw27/Df(3R)ChaM5 males barely court at all but show normal locomotor activity. Mutant combination shows some male-male chaining. Early and late steps of courtship are disrupted.

External Data
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Complementation and Rescue Data
Comments
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Mutant
Wild-type
Stocks (1)
Notes on Origin
Discoverer

Selected as: white-eyed derivative of fru0-1.

External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (2)
Reported As
Symbol Synonym
Name Synonyms
Secondary FlyBase IDs
    References (6)