GEPHE SUMMARY Print
Gephebase Gene
Entry Status
Published
GepheID
GP00000610
Main curator
Martin
PHENOTYPIC CHANGE
Trait Category
Trait State in Taxon A
Malurus leucopterus leuconotus (blue)
Trait State in Taxon B
Malurus leucopterus leucopterus (black)
Ancestral State
Data not curated
Taxonomic Status
Taxon A
Common Name
white-winged fairy-wren
Synonyms
white-winged fairy-wren
Rank
species
Lineage
Show more ... tetrapodomorpha; Tetrapoda; Amniota; Sauropsida; Sauria; Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda; Coelurosauria; Aves; Neognathae; Passeriformes; Meliphagides; Maluridae; Malurus
NCBI Taxonomy ID
is Taxon A an Infraspecies?
Yes
Taxon A Description
Malurus leucopterus leuconotus (blue)
Taxon B
Common Name
white-winged fairy-wren
Synonyms
white-winged fairy-wren
Rank
species
Lineage
Show more ... tetrapodomorpha; Tetrapoda; Amniota; Sauropsida; Sauria; Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda; Coelurosauria; Aves; Neognathae; Passeriformes; Meliphagides; Maluridae; Malurus
NCBI Taxonomy ID
is Taxon B an Infraspecies?
Yes
Taxon B Description
Malurus leucopterus leucopterus (black)
GENOTYPIC CHANGE
Generic Gene Name
MC1R
Synonyms
CMM5; MSH-R; SHEP2; MSHR
Sequence Similarities
Belongs to the G-protein coupled receptor 1 family.
UniProtKB
Homo sapiens
GenebankID or UniProtKB
Presumptive Null
No
Molecular Type
Aberration Type
SNP
SNP Coding Change
Nonsynonymous
Molecular Details of the Mutation
A16T caused by guanine-to-adenine (G_A) transition at site 46; and/or I38N cause by a tyrosine-to-adenine (T_A) transition at site 113; and/or V11N caused by a G_A transition at site 331; and/or Q157R caused by an A_G substitution at site 470; Val166Ileu - exact causing amino acid change(s) unknown
Experimental Evidence
Taxon A Taxon B Position
Codon - - -
Amino-acid - - -
Authors
Doucet SM; Shawkey MD; Rathburn MK; Mays HL; Montgomerie R
Abstract
Studies of the patterns of diversification of birds on islands have contributed a great deal to the development of evolutionary theory. In white-winged fairy-wrens, Malurus leucopterus, mainland males develop a striking blue nuptial plumage whereas those on nearby islands develop black nuptial plumage. We explore the proximate basis for this divergence by combining microstructural feather analysis with an investigation of genetic variation at the melanocortin-1 receptor locus (MC1R). Fourier analysis revealed that the medullary keratin matrix (spongy layer) of the feather barbs of blue males was ordered at the appropriate nanoscale to produce the observed blue colour by coherent light scattering. Surprisingly, the feather barbs of black males also contained a spongy layer that could produce a similar blue colour. However, black males had more melanin in their barbs than blue males, and this melanin may effectively mask any structural colour produced by the spongy layer. Moreover, the presence of this spongy layer suggests that black island males evolved from a blue-plumaged ancestor. We also document concordant patterns of variation at the MC1R locus, as five amino acid substitutions were perfectly associated with the divergent blue and black plumage phenotypes. Thus, with the possible involvement of a melanocortin receptor locus, increased melanin density may mask the blue-producing microstructure in black island males, resulting in the divergence of plumage coloration between mainland and island white-winged fairy-wrens. Such mechanisms may also be responsible for plumage colour diversity across broader geographical and evolutionary scales.
Additional References
RELATED GEPHE
Related Genes
No matches found.
Related Haplotypes
No matches found.
COMMENTS
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