Navigation Links
Inherited epigenetics produced record fast evolution
Date:2/29/2012

The domestication of chickens has given rise to rapid and extensive changes in genome function. A research team at Linkping University in Sweden has established that the changes are heritable, although they do not affect the DNA structure.

Humans kept Red Junglefowl as livestock about 8000 years ago. Evolutionarily speaking, the sudden emergence of an enormous variety of domestic fowl of different colours, shapes and sizes has occurred in record time. The traditional Darwinian explanation is that over thousands of years, people have bred properties that have arisen through random, spontaneous mutations in the chickens' genes.

Linkping zoologists, with Daniel Ntt and Per Jensen at the forefront, demonstrate in their study that so-called epigenetic factors play a greater role than previously thought. The study was published in the high-ranking journal BMC Genomics.

They studied how individual patterns of gene activity in the brain were different for modern laying chickens than the original form of the species, the red jungle fowl. Furthermore they discovered hundreds of genes in which the activity was markedly different.

Degrees of a kind of epigenetic modification, DNA methylation, were measured in several thousand genes. This is a chemical alteration of the DNA molecule that can affect gene expression, but unlike a mutation it does not appear in the DNA structure. The results show clear differences in hundreds of genes.

Researchers also examined whether the epigenetic differences were hereditary. The answer was yes; the chickens inherited both methylation and gene activity from their parentages. After eight generations of cross breeding the two types of chickens, the differences were still evident.

The results suggest that domestication has led to epigenetic changes. For more than 70 % of the genes, domesticated chickens retained a higher degree of methylation. Since methylation is a much faster process than random mutations, and may occur as a result of stress and other experiences, this may explain how variation within a species can increase so dramatically in just a short time. Ntt and Jensen's research may lead to a review of the important foundations for the theory of evolution.


'/>"/>

Contact: Per Jensen
per.jensen@liu.se
46-736-569-323
Linkping University
Source:Eurekalert  

Related biology news :

1. New test spots early signs of inherited metabolic disorders
2. New inherited neurometabolic disorder discovered
3. Fail-safe system may lead to cures for inherited disorders
4. Mutations not inherited from parents cause more than half the cases of schizophrenia
5. Mutant flies shed light on inherited intellectual disability
6. Genetic testing for inherited cardiac conditions is patchy in Europe
7. Non-coding RNA has role in inherited neurological disorder -- and maybe other brain diseases too
8. Cancer drug holds promise as first treatment for common, inherited dementia
9. New gene test offers personalized treatment for inherited neuromuscular disorder
10. Teacher effort is linked to difficult students inherited traits
11. Transcription factor scan identifies genetic cause for inherited blindness
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Inherited epigenetics produced record fast evolution
(Date:6/16/2016)... June 16, 2016 The ... expected to reach USD 1.83 billion by 2024, ... Research, Inc. Technological proliferation and increasing demand in ... expected to drive the market growth. ... The development of advanced multimodal techniques for ...
(Date:6/9/2016)... 2016  Perkotek an innovation leader in attendance control systems is proud to announce ... for employers to make sure the right employees are actually signing in, and to ... ... ... ...
(Date:6/7/2016)... , June 7, 2016  Syngrafii Inc. ... a business relationship that includes integrating Syngrafii,s patented ... branch project. This collaboration will result in greater ... the credit union, while maintaining existing document workflow ... http://photos.prnewswire.com/prnh/20160606/375871LOGO ...
Breaking Biology News(10 mins):
(Date:12/4/2016)... Dec. 3, 2016  In five studies being presented ... Annual Meeting and Exposition in San Diego ... to improve the delivery of life-saving treatments to patients ... are designed to carry therapies directly to the sites ... could provide a substantial advantage over traditional, systemic methods. ...
(Date:12/2/2016)... Dec. 2, 2016 Amgen (NASDAQ: AMGN ... announced the submission of a Marketing Authorization Application (MAA) to ... candidate to Avastin ® (bevacizumab). The companies believe this ... EMA. "The submission of ABP 215 to ... expand our oncology portfolio," said Sean E. Harper , ...
(Date:12/2/2016)... ... December 01, 2016 , ... Aerocom Healthcare ( ... hospitals, will present its chain-of-custody solution for tracking and securing medications at booth ... Dec. 4-8, 2016. , Aerocom has a proven solution for tracking medications via ...
(Date:12/2/2016)... ... December 02, 2016 , ... ... dedicated to collaboratively developing improved chemistry, manufacturing and control technologies for the ... UHPLC, with robust, probe-based sampling. , Online liquid chromatography analysis is ...
Breaking Biology Technology: