A Database of Drosophila Genes & Genomes

FB2012_01, released January 20th, 2012
 

Aberration Dmel\Df(YS)bb-Su(var)

General Information
SymbolDmel\Df(YS)bb-Su(var)SpeciesD. melanogaster
NameFlyBase IDFBab0010465
Feature typechromosomal_deletion
Computed Breakpoints include
Sequence coordinates
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Description
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FB2012_01
FB2011_10
All updates Click here to see a list of all updates to this record from FB2010_08 and on.
hide Nature of the Aberration
Cytological Order
Progenitor
Mutagen
Class of aberration (relative to progenitor)
Breakpoints
Causes alleles
Carries alleles
Transposon Insertions
Formalized genetic data
Genetic mapping information
Comments
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DDBJ /
EMBL /
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DNA sequence
Protein sequence
Name
 
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Complementation Data
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Complementation Data
Molecular Data
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Molecular Data
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Molecular Data
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In combination with other aberrations
NOT in combination with other aberrations
Slight bb according to Hawley and Tartof, but strong bb according to Ritossa. Suppresses In(1)wm4 position-effect variegation severe allele
 
hide Stocks ( 2 )
Bloomington
3805
Df(YS)bb-Su(var)/In(1)wm4, w1
Kyoto
107238
Df(YS)bb-Su(var)/In(1)wm4, w1
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Discoverer
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One of a group of Y chromosomes that carry insufficient numbers of ribosomal genes to produce wild-type bristle morphology. They are characterized by having 125 or fewer ribosomal cistrons compared to 225 in wild-type Y chromosomes. Since numbers of ribosomal cistrons are unstable and subject to change by magnification or reduction, the estimates of cistron number presented here represent historical observations and need not reflect current compositions. The distinction between chromosomes designated Ybb- and those designated Ybb not always based on objective criteria; however, Ybb chromosomes are generally hemizygous viable whereas Ybb- chromosomes are generally hemizygous lethal <up>e.g., in In(1)sc4Lsc8R/Ybb-</up> and therefore have few if any ribosomal cistrons. The original Ybb- was shown to have a foreshortened short arm; despite this cytological deficiency, however, derivative chromosomes with increased numbers of ribosomal genes have been recovered. rDNA gene number: 50
 
hide Synonyms & Secondary IDs ( 2 )
Reported As
Symbol Synonym
Df(YS)bb-Su(var)
 
YbbSu(var)
 
Name Synonym
Secondary FlyBase IDs
hide References ( 3 )
Research paper
Hawley and Tartof, 1985, Genetics 109: 691--700
A two-stage model for the control of rDNA magnification. [FBrf0042655]
Ritossa, 1968, Proc. Natl. Acad. Sci. USA 59: 1124--1131
Nonoperative DNA complementary to ribosomal RNA. [FBrf0020031]
Book
Lindsley and Zimm, 1992, The Genome of Drosophila melanogaster.
The Genome of Drosophila melanogaster. [FBrf0066905]