OMIA 000907-9031 : Shanks, green in Gallus gallus

Mendelian trait/disorder: yes

Mode of inheritance: Z-linked recessive

Considered a defect: yes

Key variant known: no

Mapping: McGibbon (1979) reported this trait to be allelic with Inhibitor of dermal melanin (Id; OMIA 001699-9031). Consistent with this, Dorshorst (pers. comm.) reported that the trait is due to interaction between the Id locus and the locus for yellow skin (OMIA 001449-9031).

Siwek et al. (2013) conducted a GWAS on 84 chickens from 35 traditional European breeds (including the Green-legged Partridgelike) and 6 representative jungle fowl species, each genotyped with the 60K SNP Illumina iSelect SNP chip, and each with an inferred genotype at three loci, namely Skin colour, yellow (W; OMIA 001449-9031), Inhibitor of dermal melanin (Id; OMIA 001699-9031), and Silky/Silkie pigmentation (Fibromelanosis) (Fm; OMIA 001671-9031). For each of the three loci, binomial association tests were conducted on a subset of the genotyped birds (having firmly-established genotypes at that locus) with that locus and each SNP. From their results, the authors concluded that "an interaction between the recessive yellow skin allele and the wild recessive allele at the dermal melanin locus present in the Silkie is responsible for the green shank phenotype", thereby confirming Dorshorst (pers. comm.).

References


Note: the references are listed in reverse chronological order (from the most recent year to the earliest year), and alphabetically by first author within a year.
2013 Siwek, M., Wragg, D., Sławińska, A., Malek, M., Hanotte, O., Mwacharo, J.M. :
Insights into the genetic history of Green-legged Partridgelike fowl: mtDNA and genome-wide SNP analysis. Anim Genet :, 2013. Pubmed reference: 23611337. DOI: 10.1111/age.12046.
1979 McGibbon, W.H. :
Green shanks and adult mortality in chickens. J Hered 70:44-6, 1979. Pubmed reference: 469223.
1978 McGibbon, W.H. :
The genetics of green spotting on shanks of Ancona chickens Journal of Heredity 69:97-100, 1978.
1974 McGibbon, W.H. :
A shank color mutation in Cornell randombred S.C. White Leghorns. Poultry Science 53:1251-1253, 1974.
1914 Burrows, H.R. :
The histological basis of the different shank colors in the domestic fowl Maine Agricultural Experiment Station Bulletin 232:237-252, 1914.

Edit History


  • Created by Frank Nicholas on 06 Sep 2005
  • Changed by Frank Nicholas on 18 Oct 2011
  • Changed by Frank Nicholas on 06 Jul 2012
  • Changed by Frank Nicholas on 02 Sep 2013
  • Changed by Frank Nicholas on 03 Sep 2013