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- Genetic Study of Black Chickens Shed Light On Mechanisms Causing Rapid Evolution in Domestic Animals. Dec.
- 22, 2011 — The genetic changes underlying the evolution of new species are still poorly understood.
- Genetic studies in domestic animals can shed light on this process due to the rapid evolution they have undergone over the last 10,000 years.
- A new study describes how a complex genomic rearrangement causes a fascinating phenotype in chickens.
- In the study published in PLoS Genetics researchers at Uppsala University, Swedish University of Agricultural Sciences, North Carolina State University and National Chung-Hsing University have investigated the genetic basis of fibromelanosis, a breed characteristic of the Chinese Silkie chicken (image on left).
- This trait involves a massive expansion of pigment cells that not only makes the skin and comb black but also causes black internal organs.
- Chickens similar in appearance to the Silkie were described by Marco Polo when he visited China in the 13th century and Silkie chickens have a long history in Chinese cuisine and traditional Chinese medicine.
- "We have shown that the genetic change causing fibromelanosis is a complex rearrangement that leads to increased expression of Endothelin 3, a gene which is known for promoting the growth of pigment cells," explains Ben Dorshorst the post-doctoral researcher responsible for the work.
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