How Bird Necks Get Naked
Author Information
Author(s): Mou Chunyan, Pitel Frederique, Gourichon David, Vignoles Florence, Tzika Athanasia, Tato Patricia, Yu Le, Burt Dave W., Bed'hom Bertrand, Tixier-Boichard Michele, Painter Kevin J., Headon Denis J.
Primary Institution: The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh
Hypothesis
The study investigates the genetic and developmental basis for the loss of neck feathering in birds, particularly focusing on the Naked neck trait in chickens.
Conclusion
The Naked neck trait in chickens is caused by increased BMP12 expression, which suppresses feather development on the neck while allowing normal feathering on the body.
Supporting Evidence
- The study identifies a large insertion associated with the Naked neck trait that affects BMP12 expression.
- Elevated BMP12 expression in Naked neck embryos leads to a lack of feather placodes on the neck.
- Retinoic acid signaling is found to sensitize neck skin to BMP-mediated inhibition of feather development.
- The findings suggest a modularity in feather patterning between neck and body skin.
Takeaway
This study shows that bird necks can be bare because of a special gene that makes them lose their feathers, helping them stay cool in hot weather.
Methodology
The researchers performed genetic fine mapping and expression analysis to identify the causative mutation and its effects on feather development.
Limitations
The study primarily focuses on chickens and may not fully represent feather development in all bird species.
Participant Demographics
The study involved various chicken breeds, including Naked neck individuals from different geographical locations.
Digital Object Identifier (DOI)
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