GEPHE SUMMARY Print
Entry Status
Published
GepheID
GP00000660
Main curator
Martin
PHENOTYPIC CHANGE
Trait Category
Trait State in Taxon A
Coturnix japonica
Trait State in Taxon B
Coturnix japonica - silver
Ancestral State
Taxon A
Taxonomic Status
Taxon A
Common Name
Japanese quail
Synonyms
Coturnix coturnix Japonicus; Coturnix coturnix japanica; Coturnix coturnix japonica; Coturnix japonica japonica; Japanese quail; Coturnix japonica Temminck & Schlegel, 1849
Rank
species
Lineage
Show more ... ha; Tetrapoda; Amniota; Sauropsida; Sauria; Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda; Coelurosauria; Aves; Neognathae; Galloanserae; Galliformes; Phasianidae; Perdicinae; Coturnix
NCBI Taxonomy ID
is Taxon A an Infraspecies?
No
Taxon B
Common Name
Japanese quail
Synonyms
Coturnix coturnix Japonicus; Coturnix coturnix japanica; Coturnix coturnix japonica; Coturnix japonica japonica; Japanese quail; Coturnix japonica Temminck & Schlegel, 1849
Rank
species
Lineage
Show more ... ha; Tetrapoda; Amniota; Sauropsida; Sauria; Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda; Coelurosauria; Aves; Neognathae; Galloanserae; Galliformes; Phasianidae; Perdicinae; Coturnix
NCBI Taxonomy ID
is Taxon B an Infraspecies?
Yes
Taxon B Description
Coturnix japonica - silver
GENOTYPIC CHANGE
Generic Gene Name
Mitf
Synonyms
Wh; bw; mi; vit; BCC2; Bhlhe32; Gsfbcc2; Vitiligo; Bw; Mi; Vit
Sequence Similarities
Belongs to the MiT/TFE family.
UniProtKB
Mus musculus
GenebankID or UniProtKB
Presumptive Null
Yes
Molecular Type
Aberration Type
Deletion Size
1-9 bp
Molecular Details of the Mutation
2bp deletion
Experimental Evidence
Authors
Minvielle F; Bed'hom B; Coville JL; Ito S; Inoue-Murayama M; Gourichon D
Abstract
The MITF (microphthalmia-associated transcription factor) gene has been investigated in mice and various vertebrates but its variations and associated effects have not yet been explored much in birds. The present study describes the causal mutation B at the MITF gene responsible for the "silver" plumage colour in the Japanese quail (Coturnix japonica), and its associated effects on growth and body composition, and tests its allelism with the "blue" plumage colour mutation Bl in Gallus gallus.

The semi dominant B mutation results from a premature stop codon caused by a 2 bp deletion in exon 11 of MITF. Homozygous "white" (B/B) quail which have a white plumage also show a slightly lower growth, lower body temperature, smaller heart, and lighter pectoralis muscles but more abdominal adipose tissue than the recessive homozygous "wild-type" (+/+) and heterozygous "silver" (B/+) quail. Similar observations on cardiac and body growth were made on mice (Mus musculus) homozygous for mutations at MITF. The production of chicken-quail hybrids with a white plumage obtained by crossing Bl/+ chicken heterozygous for the blue mutation with B/B white quail indicated that the mutations were allelic.

The "silver" Japanese quail is an interesting model for the comparative study of the effects of MITF in birds and mammals. Further investigation using a chicken family segregating for the "blue" plumage and molecular data will be needed to confirm if the "blue" plumage in chicken results from a mutation in MITF.
Additional References
EXTERNAL LINKS
COMMENTS
YOUR FEEDBACK is welcome!