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#115977 - 08/09/16 07:30 PM Re: Journal papers online - reference list [Re: KazJaps]
KazJaps Offline
Classroom Professor

Registered: 08/30/02
Posts: 2807
Loc: Australia
An aggression gene SORCS2 on Chromosome 4, found in a Chinese dwarf yellow meat type breed:

Li Z, Zheng M, Abdalla BA, Zhang Z, Xu Z, Ye Q, Xu H, Luo W, Nie Q, Zhang X
Genome-wide association study of aggressive behaviour in chicken.
Sci Rep. 2016 Aug 3;6:30981. doi: 10.1038/srep30981.
http://www.nature.com/articles/srep30981

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#115979 - 08/09/16 08:30 PM Re: Journal papers online - reference list [Re: KazJaps]
KazJaps Offline
Classroom Professor

Registered: 08/30/02
Posts: 2807
Loc: Australia
In the following research they looked for genes that influence comb traits (measured length, height, weight) compared between Leghorns & a Chinese breed. They determined the three genes VPS36, AR and WNT11B had significant influence on comb length, height & weight. These genes are found on Chromosomes 1 (VPS36) & 4 (WNT11B, AR).

VPS36 = vacuolar protein sorting 36
AR = Androgen Receptor
WNT11B = wingless-type MMTV integration site family, member 11B

Shen, M., Qu, L., Ma, M., Dou, T., Lu, J., Guo, J., Yang, N. (2016).
Genome-Wide Association Studies for Comb Traits in Chickens.
PLoS ONE, 2016 11(7), e0159081. http://doi.org/10.1371/journal.pone.0159081
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4948856/


Edited by KazJaps (08/09/16 08:47 PM)
Edit Reason: clarified

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#115981 - 08/09/16 09:32 PM Re: Journal papers online - reference list [Re: KazJaps]
KazJaps Offline
Classroom Professor

Registered: 08/30/02
Posts: 2807
Loc: Australia
The causal gene for Creeper has been determined, a deletion on IHH Indian Hedgehog gene (Chromosome 7). This gene is very close to the rosecomb gene MNR2 (ie very close linkage between Rosecomb & Creeper). They used the Chinese breed: "Chinese Xingyi bantams" for their source of the Creeper gene. The paper also has interesting images of homozygous Cp/Cp embryos (a lethal gene when homozygous).

Jin, S., Zhu, F., Wang, Y., Yi, G., Li, J., Lian, L., Yang, N. (2016).
Deletion of Indian hedgehog gene causes dominant semi-lethal Creeper trait in chicken.
Scientific Reports, 2016, 6, 30172. http://doi.org/10.1038/srep30172
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4954956/

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#115982 - 08/10/16 12:31 PM Re: Journal papers online - reference list [Re: KazJaps]
dingsda Offline
Bantam

Registered: 09/07/14
Posts: 64
Loc: Germany
Originally Posted By: KazJaps
The causal gene for Creeper has been determined, a deletion on IHH Indian Hedgehog gene (Chromosome 7). This gene is very close to the rosecomb gene MNR2 (ie very close linkage between Rosecomb & Creeper). They used the Chinese breed: "Chinese Xingyi bantams" for their source of the Creeper gene. The paper also has interesting images of homozygous Cp/Cp embryos (a lethal gene when homozygous).

Jin, S., Zhu, F., Wang, Y., Yi, G., Li, J., Lian, L., Yang, N. (2016).
Deletion of Indian hedgehog gene causes dominant semi-lethal Creeper trait in chicken.
Scientific Reports, 2016, 6, 30172. http://doi.org/10.1038/srep30172
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4954956/


thank you for the link. This year I had a similar Cp/Cp embryo dead in the egg from my japanese bantams, with tiny wings and no visible legs.

I wonder why some develope this far, since most embryos seem to die early. Alas, the paper does not elaborate on that.

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#115983 - 08/10/16 03:39 PM Re: Journal papers online - reference list [Re: dingsda]
Wieslaw Offline
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Classroom Professor

Registered: 09/18/09
Posts: 3770
Loc: Denmark
Originally Posted By: dingsda
Originally Posted By: KazJaps
The causal gene for Creeper has been determined, a deletion on IHH Indian Hedgehog gene (Chromosome 7). This gene is very close to the rosecomb gene MNR2 (ie very close linkage between Rosecomb & Creeper). They used the Chinese breed: "Chinese Xingyi bantams" for their source of the Creeper gene. The paper also has interesting images of homozygous Cp/Cp embryos (a lethal gene when homozygous).

Jin, S., Zhu, F., Wang, Y., Yi, G., Li, J., Lian, L., Yang, N. (2016).
Deletion of Indian hedgehog gene causes dominant semi-lethal Creeper trait in chicken.
Scientific Reports, 2016, 6, 30172. http://doi.org/10.1038/srep30172
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4954956/


thank you for the link. This year I had a similar Cp/Cp embryo dead in the egg from my japanese bantams, with tiny wings and no visible legs.

I wonder why some develope this far, since most embryos seem to die early. Alas, the paper does not elaborate on that.


There is somewhere a japanese paper on so called "mother effect" (or so) on Cp/Cp. I do not remember all details, but something in that style:" all leghorns and minorcas that were Cp/Cp died, but some chabo survived and hatched. Does anybody else remember it too?

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#115984 - 08/10/16 04:45 PM Re: Journal papers online - reference list [Re: dingsda]
KazJaps Offline
Classroom Professor

Registered: 08/30/02
Posts: 2807
Loc: Australia
That's interesting Dingsda re. Cp/Cp embryo in Japs. I've never seen them (although I did lose interest in inspecting all dead-in-shell Jap embryos/chicks). I think in PB&G there is mention of different studies on the Creeper gene where the embryos died at different incubation periods, depending on lines/ breeds studied. I think in my Japs that most (if not all) Cp/Cp died very early, as I didn't find any of those legless or deformed embryos.

Note too that mutations on the IHH (Indian hedgehog) gene (chicken Cp creeper locus) in other species can cause Brachydactyly phenotypes (eg shortened digits).

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

Looks like I might have forgotten to post this 2016 paper. It's mostly on pigeon foot feather mutations, candidate genes PITX1 & TBX5 (touches on chicken research):

Domyan, E. T., Kronenberg, Z., Infante, C. R., Vickrey, A. I., Stringham, S. A., Bruders, R., Shapiro, M. D. (2016).
Molecular shifts in limb identity underlie development of feathered feet in two domestic avian species.
eLife, 5, e12115. http://doi.org/10.7554/eLife.12115
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4805547/

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#115988 - 08/11/16 01:07 AM Re: Journal papers online - reference list [Re: KazJaps]
Wieslaw Offline
Moderator
Classroom Professor

Registered: 09/18/09
Posts: 3770
Loc: Denmark
I have found it. I remembered incorrectly. It was about surviving of the embryos to near hatch, not hatching

MATERNAL EFFECTS ON EXPRESSION OF LETHALITY IN THE CREEPER CHICKEN

https://www.jstage.jst.go.jp/article/ggs1921/51/5/51_5_347/_article

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#115989 - 08/11/16 07:48 AM Re: Journal papers online - reference list [Re: Wieslaw]
dingsda Offline
Bantam

Registered: 09/07/14
Posts: 64
Loc: Germany
Originally Posted By: Wieslaw
I have found it. I remembered incorrectly. It was about surviving of the embryos to near hatch, not hatching

MATERNAL EFFECTS ON EXPRESSION OF LETHALITY IN THE CREEPER CHICKEN

https://www.jstage.jst.go.jp/article/ggs1921/51/5/51_5_347/_article


thank you Wieslaw, much appreciated!

I checked my hatch records and the Cp/Cp embryo was actually the second egg of the hens laying period, so it corresponds to the authors results.

But still wondering what gets put in the egg for the embryos to come so far.


Edited by dingsda (08/11/16 07:49 AM)

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#116235 - 12/21/16 04:02 PM Re: Journal papers online - reference list [Re: dingsda]
Wieslaw Offline
Moderator
Classroom Professor

Registered: 09/18/09
Posts: 3770
Loc: Denmark
Green shanks and adult mortality in chickens, abstract

https://www.ncbi.nlm.nih.gov/pubmed/469223

Pay attention to the description of feathers.

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#116236 - 12/22/16 11:00 PM Re: Journal papers online - reference list [Re: Wieslaw]
KazJaps Offline
Classroom Professor

Registered: 08/30/02
Posts: 2807
Loc: Australia
Thanks Wieslaw. That's interesting.

Although I've posted the full paper link previously (which usually means that I've downloaded the full paper), I haven't been able to find a full copy saved:

Green shanks and adult mortality in chicken.
(W. H. MCGIBBON)(J Hered-1979-MCGIBBON-44-6)
http://jhered.oxfordjournals.org/content/70/1/44.full.pdf
* this one not available for free now.

But I did find McGibbon's earlier 1974 Poultry Science full paper on this id^c Cornell line mutation:


A shank color mutation in Cornell random bred S.C. White Leghorns.
McGibbon WH.
Poult Sci. 1974 May;53(3):1251-3.
http://ps.oxfordjournals.org/content/53/3/1251.abstract

In the final paragraph (of full paper):
Quote:
Most of the birds with green shanks (White Leghorns) that have been reared to maturity display some color on the mandibles and a distinct surface coloration of the plumage. The males' coloration is of a grayish caste or dirty white overall, while the females display a pale golden color restricted to the neck feathers. The causative allele "idc" is suggested.

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