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#111703 - 02/07/14 07:22 AM Re: Journal papers online - reference list [Re: KazJaps]
Henk69 Offline
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Registered: 02/13/06
Posts: 3208
Loc: Netherlands
How common is that mo^w?
Exchequer explained? wink

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#111712 - 02/07/14 05:46 PM Re: Journal papers online - reference list [Re: Henk69]
KazJaps Offline
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Registered: 08/30/02
Posts: 2805
Loc: Australia
mow white is not that common, mainly in white Japanese long-tail fowl. So it is in Asia, but would also be found in the USA in white long-tail stock.

Unfortunately Exchequer Leghorns weren't DNA tested. But mow White crossed with mo Black Mottled produced typical Exchequer phenotype.
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Here is Somes', 1980 mo paper:

RALPH G. SOMES, JR.
The Mottling Gene, the Basis of Six Plumage Color Patterns in the Domestic Fowl.
Poultry Science (1980) 59 (7): 1370-1374 doi:10.3382/ps.0591370
Full Paper

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#111751 - 02/11/14 04:00 AM Re: Journal papers online - reference list [Re: KazJaps]
Piet Offline
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Registered: 10/07/10
Posts: 262
Loc: Belgium
Exchequer x Exchequer does not give white so this can't be the explanation....

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#111752 - 02/11/14 04:05 AM Re: Journal papers online - reference list [Re: Piet]
Henk69 Offline
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Registered: 02/13/06
Posts: 3208
Loc: Netherlands
It does not give white, but maybe whiter than average? wink

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#111754 - 02/11/14 10:19 AM Re: Journal papers online - reference list [Re: Henk69]
KazJaps Offline
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Registered: 08/30/02
Posts: 2805
Loc: Australia
No, but it means that mow and mo were alleles of the same locus. Both alleles were recessive to wild-type Mo+, but when crossed together (heterozygous mow/mo) they produced an intermediate phenotype (very similar to Exchequer). Ie, mow and mo are incomplete recessives to each other.

Reminds me of dogs & white spotting alleles.

Need to wait until an Exchequer phenotype is DNA tested.

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#112273 - 02/26/14 06:57 AM Re: Journal papers online - reference list [Re: KazJaps]
KazJaps Offline
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Registered: 08/30/02
Posts: 2805
Loc: Australia
Pigeons:

Domyan et al. (2014) Epistatic and Combinatorial Effects of Pigmentary Gene Mutations in the Domestic Pigeon.
Current Biology, 2014; DOI: 10.1016/j.cub.2014.01.020
Full Paper

*Mutations found on SOX10 (e recessive red), SLC45A2 (d dilute) & TYRP1 (B^A Ash Red, b Brown).
GENE---||Chickens ||Pigeons .||
Slc45a2..|| S locus. || d locus ||
Tyrp1....|| choc.....|| B^A, b ||
Sox10....|| Db locus || e locus ||
,
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Mainly MC1R (E locus in chickens) papers:

Pigeons:

Color differences among feral pigeons (Columba livia) are not attributable to sequence variation in the coding region of the melanocortin-1 receptor gene (MC1R).
Derelle R, Kondrashov FA, Arkhipov VY, Corbel H, Frantz A, Gasparini J, Jacquin L, Jacob G, Thibault S, Baudry E.
BMC Res Notes. 2013 Aug 5;6(1):310.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3750627/pdf/1756-0500-6-310.pdf

Guernsey MW, Ritscher L, Miller MA, Smith DA, Schöneberg T, et al. (2013) A Val85Met Mutation in Melanocortin-1 Receptor Is Associated with Reductions in Eumelanic Pigmentation and Cell Surface Expression in Domestic Rock Pigeons (Columba livia). PLoS ONE 8(8): e74475. doi:10.1371/journal.pone.0074475
Full Paper

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Evolutionarily conserved telomeric location of BBC1 and MC1R on a microchromosome questions the identity of MC1R and a pigmentation locus on chromosome 1 in chicken.
Alexei Sazanov, Julio Masabanda, Dagmar Ewald, Sakae Takeuchi, Micheale Tixier-Boichard, Johannes Buitkamp & Ruedi Fries
Chromosome Research Vol 6 1998 651-654.
http://cdn.scipeople.com/materials/7733/BBC1_MCR1.pdf

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Study on Association of Melanocortin 1-Receptor (MC1R ) Mutations with Melanin Trait in Chinese Domestic Chickens.
Z.Q. Yang,Z.R. Zhang,M. Xu,Q. Zhu
Research Journal of Animal Sciences. 2(2): 45-49 2008
http://docsdrive.com/pdfs/medwelljournals/rjnasci/2008/45-49.pdf

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Investigation of MC1R SNPs and Their Relationships with Plumage Colors in Korean Native Chicken
Hoque, M.R.; Jin, S.; Heo, K.N.; Kang, B.S.; Jo, C.; Lee, J.H.
Asian-Australasian Journal of Animal Sciences: Volume 26, Issue ,5, 2013, pp.625-629
Full Paper

Genetic Variations of Chicken MC1R Gene and Associations with Feather Color of Korean Native Chicken (KNC) ‘Woorimatdag
Park et al.
Korean Journal of Poultry Science: Volume 40, Issue ,2, 2013, pp.139-145
Abstract & photo descriptions in English
----------------------------
Genome-wide Association Study of Chicken Plumage Pigmentation
Park et al.
Asian Australas. J. Anim. Sci. Vol. 26, No. 11 : 1523-1528 November 2013
http://www.ajas.info/Editor/manuscript/upload/26-188.pdf

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#112274 - 02/26/14 07:04 AM Re: Journal papers online - reference list [Re: KazJaps]
KazJaps Offline
Classroom Professor

Registered: 08/30/02
Posts: 2805
Loc: Australia
The following researchers were looking at the SOBP gene as a candidate for hookless - silky feathers.

Chicken sine oculis binding protein homolog (sobp), a novel gene that may regulate feather development
W. Liu and N. Li
Poultry Science (2012) 91 (8): 1950-1955 doi:10.3382/ps.2011-02114
Full Paper

* SOBP is on Chromosome 3.
* Dorshorst et al 2010 thought that hookless might be on Chromosome 3 too.
http://jhered.oxfordjournals.org/content/early/2010/01/11/jhered.esp120.full.pdf

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#112475 - 03/22/14 05:08 PM Re: Journal papers online - reference list [Re: Henk69]
Redcap Offline
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Registered: 08/14/06
Posts: 954
Loc: Germany
A multiple allelic series affecting feather color in the domestic fowl.
Smyth, J. R., Jr., and B. B. Bohren,
Poultry Sci. 1949. 28: 782. [Abstract]

Crosses between chickens having extended black, New Hampshire (Columbian), Dark Cornish, and Dark Brown Leghorn color patterns showed that each pattern differed from the others by a single autosomal gene. Crosses in which three or four of these characters were involved simultaneously also segregated in a manner indicating the existence of an allelic series consisting of three and possibly four genes. Black (E) is dominant to the black-red (ep) pattern as in the Cornish and Brown Leghorn and is incompletely dominant to Columbian (e).
The Columbian pattern (e) is almost completely dominant to Cornish but is less completely dominant to the Brown Leghorn pattern. The data are insufficient at this time to determine the relationship of the Cornish and Brown Leghorn patterns. The data suggest that these patterns are produced by two alleles at the E locus thus giving a four allele series. It is possible, however, that further investigation may show these two patterns to be produced by a single allele at this locus and that the differences between them is caused by genes modifying the basic black-red pattern and resulting in a three allele series.
_________________________

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#113489 - 01/06/15 12:03 AM Re: Journal papers online - reference list [Re: Redcap]
KazJaps Offline
Classroom Professor

Registered: 08/30/02
Posts: 2805
Loc: Australia
* Getting close to identifying Id locus...

A genome-wide association study identifies novel single nucleotide polymorphisms associated with dermal shank pigmentation in chickens.
Li G, Li D, Yang N, Qu L, Hou Z, Zheng J, Xu G, Chen S.
Poult Sci. 2014 Dec;93(12):2983-7. doi: 10.3382/ps.2014-04164. Epub 2014 Sep 26.
Abstract

----------------------------------

Forgot to add this Spanish E locus (MC1R) paper earlier:

Association between polymorphism in the melanocortin 1 receptor gene and E locus plumage color phenotype.
Dávila SG, Gil MG, Resino-Talaván P, Campo JL.
Poult Sci. 2014 May;93(5):1089-96. doi: 10.3382/ps.2013-03611.
abstract

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Flink LG, et al. Establishing the validity of domestication genes using DNA from ancient chickens.
Proc Natl Acad Sci USA. 2014;111:6184–6189.
Full Paper-html
pdf:
http://www.pnas.org/content/111/17/6184.full.pdf

*Includes research on BCDO2 - yellow skin allele in ancient European chickens. Although some ancient specimens were heterozygous for yellow skin allele, the researchers believed that yellow skin only became widespread in the last 500 years in European chickens.
Article:
http://www.sciencedaily.com/releases/2014/04/140418141123.htm

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#113490 - 01/06/15 12:13 AM Re: Journal papers online - reference list [Re: KazJaps]
KazJaps Offline
Classroom Professor

Registered: 08/30/02
Posts: 2805
Loc: Australia
Hookless - silky feather mutation found on PDSS2 gene....

Feng, C., Gao, Y., Dorshorst, B., Song, C., Gu, X., Li, Q., … Li, N. (2014).
A cis-Regulatory Mutation of PDSS2 Causes Silky-Feather in Chickens.
PLoS Genetics, 10(8), e1004576. doi:10.1371/journal.pgen.1004576
Full paper

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