Navigation Links
Darwin was wrong about the wild origin of the chicken
Date:2/29/2008

Charles Darwin maintained that the domesticated chicken derives from the red jungle fowl, but new research from Uppsala University now shows that the wild origins of the chicken are more complicated than that.

The researchers mapped the genes that give most domesticated chickens yellow legs and found to their surprise that this genetic heredity derives from a closely related species, the grey jungle fowl. The study is being published today in the Web edition of PLoS Genetics.

Our studies show that even though most of the genes in domesticated fowls come from the red jungle fowl, at least one other species must have contributed, specifically the grey jungle fowl, says Jonas Eriksson, a doctoral student at Uppsala University.

It is most likely the case that the grey jungle fowl was crossed with an early form of the domesticated chicken. The genes for yellow skin are spread among billions of domesticated chickens around the world. Darwins studies of domesticated animals were of key importance to his theory of evolution, and he also explained the wild origins of domesticated animals.

Whats ironic is that Darwin thought that more than one wild species had contributed to the development of the dog, but that the chicken came from only one wild species, the red jungle fowl. Now it turns out that its just the opposite way around, says Greger Larson, a researcher at Uppsala University and Durham University in England.

The yellow leg color is a result of fodder: the more yellow carotenoids there are in the feed, the yellower the legs. The gene that these researchers have now identified codes for an enzyme that breaks down carotenoids and releases vitamin A. This gene is shut down in skin but fully active in other tissues in chickens with yellow legs. The consequence is that yellow carotenoids are stored in the skin in these chickens. This is called a regulatory mutation since the coding sequence of the gene is intact,
'/>"/>

Contact: Leif Andersson
leif.andersson@imbim.uu.se
46-070-514-4904
Uppsala University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Darwin Symposium at Field Museum offers broad overview of his science and its impact
2. Cosmopolitan microbes -- hitchhikers on Darwins dust
3. The surprising story of Charles Darwin and his homeopathic doctor
4. Doctors may be giving the wrong dosage of adrenaline in an emergency because of labelling
5. Inquiring minds want to know about cotton fleahoppers
6. Misconceptions about Alzheimers varies among races, survey suggests
7. Inquiring minds want to know about cotton fleahoppers
8. Americans remain pessimistic about the environment, Stanford-AP survey finds
9. Rutgers scientists research reveals critical knowledge about the nervous system
10. High-tech helmets reveal new information about the impact of hard hits to the head
11. New study increases concerns about climate model reliability
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/20/2014)... causes a burning spiciness that is irresistible to some, ... effect are using their findings to develop a new ... be caused by inflammation or other problems. They reported ... in clinical trials, in ACS, Journal of Medicinal ... decades ago, scientists had pegged a compound called capsaicin ...
(Date:8/20/2014)... about 4,000 members, it triggers an important first stage ... type of comb used for rearing male reproductive, called ... Neurobiology and Behaviour at Cornell University, led by Michael ... colonies. The results are published in Springer,s journal ... Reproduction isn,t always a honeybee colony,s top priority. ...
(Date:8/19/2014)... must be made to decrease China,s increasing caesarean section ... in BJOG: An International Journal of Obstetrics and ... highest caesarean delivery rates in the world. Of 16 ... caesarean. Although the exact rate is not known, the ... reports total caesarean rates ranging from 36% to 58%. ...
Breaking Biology News(10 mins):Worker bees 'know' when to invest in their reproductive future 2Is China's 50 percent cesarean section delivery rate too high? 2Is China's 50 percent cesarean section delivery rate too high? 3
... Residents along the Gulf Coast are bracing for Hurricane Ike ... through Cuba and Haiti. ESA,s Envisat satellite is tracking the ... coast by 13 September. Knowing the strength and path ... (EO) satellites are key means of providing synoptic data on ...
... Leonid Yaroslavsky from Tel Aviv University, the saying may be ... humans may have an ability to "see" colors and shapes ... a chapter of a new book, Advances in Information ... form of optical imaging technology that beats the limitations of ...
... to increase usability and adoption of SMS and mobile ... Social ... Systems,Corporation, a leading developer of innovative voice-powered mobile,applications, unveiled today ... highly accurate voice dictation system. Using the company,s proprietary,Client Server ...
Cached Biology News:Hurricane Ike tracked by ESA's Envisat 2Seeing through the skin 2Promptu Unveils High Accuracy Voice-to-Text Dictation for Mobile Phones at CTIA 2
(Date:8/20/2014)... High performance computing (HPC) will be ... climate and Earth system model to address the ... Eight national laboratories, including Lawrence Livermore , ... Atmospheric Research, four academic institutions and one private-sector ... laboratories include Argonne, Brookhaven, Lawrence Berkeley, Los Alamos, ...
(Date:8/20/2014)... JOSE, Calif. , Aug. 20, 2014 /PRNewswire-iReach/ ... highlights the transformative collaboration between the school,s bioengineering ... As part of the Intel® Software Academic Program, ... computer sciences and the human body.  ... The study exhibits the work of Dr. ...
(Date:8/19/2014)... 19, 2014 Shimadzu Scientific Instruments ... Prominence-i and Nexera-i, adding to the company’s extensive ... functionality, an intuitive operating environment, and full automation, ... efficient workflow for conventional to ultra-high-speed analysis. ... and intelligent design so users can begin building ...
(Date:8/19/2014)... Robin Williams’ passing is a sad reminder ... individual. Symptoms range from slowness of voluntary movements ... severe depression. Parkinson’s disease progressively gets worse over ... neurons of the brain. As these patients struggle ... progressively gets worse, they look for options. ...
Breaking Biology Technology:New Project Is the ACME of Addressing Climate Change 2New Project Is the ACME of Addressing Climate Change 3Intel and University of San Diego Bioengineering Department Release Case Study on Health Sciences Research 2Shimadzu’s New i-Series Integrated Liquid Chromatography Systems Provide Laboratories Wider Range of Analytical Capabilities 2Shimadzu’s New i-Series Integrated Liquid Chromatography Systems Provide Laboratories Wider Range of Analytical Capabilities 3As We Mourn Robin Williams’ Passing, His Death Sheds Light on Patients Struggling with Parkinson’s Disease 2As We Mourn Robin Williams’ Passing, His Death Sheds Light on Patients Struggling with Parkinson’s Disease 3
... LAIYANG, China, Nov. 3 /Xinhua-PRNewswire-FirstCall/ -- Genesis,Pharmaceuticals ... or,the "Company"), a U.S. pharmaceutical company with ... China, today announced the launch of its ... ., The website features an ...
... Nov. 3 Altogen Biosystems (http://www.altogen.com ),announced ... laboratories and research facilities for animal testing. Transfection ... introduce DNA and RNA molecules,into cells and tissues. ... barriers and deliver a gene or a small ...
... NLTX ), announced today that Peter Strumph, Chief ... -- Rodman & Renshaw 10th Annual Healthcare Conference ... Monday, November 10, 2008 at The Palace Hotel in,New ... Healthcare Conference at 9:00 a.m.,ET on Wednesday, November 19, ...
Cached Biology Technology:Genesis Pharmaceuticals Launches New Corporate Website 2Altogen Biosystems Launches New Nanoparticle-based In Vivo Transfection Reagent 2Nile Therapeutics to Present at Two Upcoming Investor Conferences 2
Human Presenilin-2 NTF Affinity Purified Polyclonal Ab...
... for cryogenic vials. Racks ... stainless steel boxes for 2ml, ... Vapor phase or Liquid ... risers to be ordered separately ...
... Karn (1995) This volume provides ... methods for the study of major HIV ... transcriptase, ribonuclease H, integrase and protease. Expression ... assays; Tat and Rev assays; HIV/CD4 interactions; ...
Monkey IL-2 ELISPOT Kit with white/opague microtiter plates...
Biology Products: