Yellow Skin Gene and the Hybrid Origin of Domestic Chickens
Author Information
Author(s): Eriksson Jonas, Larson Greger, Gunnarsson Ulrika, Bed'hom Bertrand, Tixier-Boichard Michele, Strömstedt Lina, Wright Dominic, Jungerius Annemieke, Vereijken Addie, Randi Ettore, Jensen Per, Andersson Leif
Primary Institution: Uppsala University
Hypothesis
The yellow skin phenotype in domestic chickens is caused by specific genetic mutations and may have originated from a hybridization event with grey junglefowl.
Conclusion
The study provides conclusive evidence that the yellow skin allele in domestic chickens likely originated from the grey junglefowl, not solely from the red junglefowl.
Supporting Evidence
- The yellow skin phenotype is caused by a recessive allele that affects carotenoid deposition.
- Molecular analysis revealed that the yellow skin allele is linked to the BCDO2 gene.
- Phylogenetic analysis suggests that the yellow skin allele originated from grey junglefowl.
- The study found significant genetic divergence between yellow and white skin alleles.
- The research indicates that yellow skin may have been favored for both aesthetic and health reasons during domestication.
Takeaway
Chickens with yellow skin got their color from a special gene, and it turns out they might have mixed with another type of wild chicken to get it.
Methodology
The study used linkage analysis and Identical-by-Descent mapping to identify the gene responsible for yellow skin in chickens.
Potential Biases
Potential bias may arise from the limited number of breeds analyzed for the yellow skin phenotype.
Limitations
The study did not explore all potential genetic variations that could influence skin color in chickens.
Participant Demographics
The study involved various domestic chicken breeds and wild junglefowl species.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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