Navigation Links
A history lesson from genes
Date:1/9/2013

. The goal of this research is to learn more about departures from 'tree-ness.'"

Pritchard and Pickrell developed software called TreeMix that compares how often variants of a particular gene from different populations appear in the same species. It then calculates how closely groups are related, and when in their history they separated to form a genetically distinct population or breed.

The resulting graph looks less like tree branches and more like a tangled shrub or mass of vines. The trunk of the shrub represents the major relationships between the groups, and the largest branches represent distinct populations as they develop over time from left to right on the graph. But those tangled vines that crisscross the branches are the key, showing migration events where a previously separate population mixed with another, rejoining to form a new group at a later point in time.

Pritchard and Pickrell tested the model using DNA from 55 human populations and 82 dog breeds, and already found some interesting results. For example, boxer and basenji breeds of dogs trace a large portion of their DNA (nine percent and 25 percent, respectively) back to wolves after domestication, meaning that these breeds interbred with wolves again after humans had begun to domesticate dogs.

"What I like about this is that it's starting to give us some resolution on relationships that are just much more complicated than you can capture using the standard tree approach," Pritchard said.

He gave another example of the Mozabite people who live in Algeria. Their DNA is largely a mixture of European and Middle Eastern ancestry, but they also mixed with sub-Saharan African ancestors at various points in their history. The new model can represent the complex relationships among all of these backgrounds, whereas the traditional tree-based method would just show a primary relationship to Middle Easterners.

Another group of researchers has already
'/>"/>

Contact: Matt Wood
matthew.wood@uchospitals.edu
773-702-5894
University of Chicago Medical Center
Source:Eurekalert  

0

GOOD

Page: 1 2 3

Related biology news :

1. Chinese scientists discover evidence of giant pandas population history and local adaptation
2. Reading history through genetics
3. New test adds to scientists understanding of Earths history, resources
4. Recent studies bring fossils and genes together to piece together evolutionary history
5. King Richard III search in new phase after discovery has potential to rewrite history
6. New Nature study illuminates 55 million years of the carbon cycle and climate history
7. Geologys Mystery Interval, the Great Deepening, and the largest kill-off in Earth history
8. Bringing natural history collections out of the dark
9. Short stretches of piRNA evaluate cells genetic history
10. IU role in Human Microbiome Project exposes battle history between bacteria, viruses in human body
11. New report puts real numbers behind history of oyster reefs
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
A history lesson from genes
(Date:6/18/2013)... a very large "dead zone" in the Gulf of ... the Chesapeake Bay this year, based on several NOAA-supported ... Michigan, Louisiana State University, and the Louisiana Universities ... Mexico hypoxic "dead" zone will be between 7,286 and ... ten largest recorded. That would range from an area ...
(Date:6/18/2013)... Health has awarded $12.7 million to match nine ... industry compounds to explore new treatments for patients ... muscular dystrophy and schizophrenia. The collaborative pilot initiative, ... is led by the National Center for Advancing ... Common Fund. , The process of developing a ...
(Date:6/18/2013)... 2013: The Association for Molecular Pathology is proud to ... for Experimental Biology (FASEB) on July 1, 2013. The ... 3, 2013. , The 26 constituent societies of ... common vision for the advancement of research and education ... research is more important now than ever," said Jennifer ...
Breaking Biology News(10 mins):NOAA, partners predict possible record-setting deadzone for Gulf of Mexico 2NOAA, partners predict possible record-setting deadzone for Gulf of Mexico 3NOAA, partners predict possible record-setting deadzone for Gulf of Mexico 4NIH to fund collaborations with industry to identify new uses for existing compounds 2NIH to fund collaborations with industry to identify new uses for existing compounds 3NIH to fund collaborations with industry to identify new uses for existing compounds 4
... ease symptoms in people with Parkinson's disease and other ... electrical signals of their diseased brains. , Despite the ... by the Food and Drug Administration and can be ... mechanisms by which deep brain stimulation alleviates disease symptoms ...
... robotic vehicle designed for underwater exploration plunged repeatedly ... sinkhole in late May, finding its previously undiscovered ... a sonar map of its inner dimensions. The ... by Carnegie Mellon University’s Robotics Institute. , During ...
... simple notion of copying the body’s own natural "waste disposal" ... estimated 80 percent of patients with urea cycle disorders --- ... this week’s New England Journal of Medicine summarizing a quarter ... of sodium phenylacetate and sodium benzoate, two chemicals the body ...
Cached Biology News:How brain pacemakers erase diseased messages 2How brain pacemakers erase diseased messages 3NASA-funded robotic sub finds bottom of world's deepest sinkhole 2An 'elegant' idea proves its worth 25 years later 2
(Date:6/18/2013)... 2013 DuPont welcomes 48 of the ... DuPont National AgriScience Teachers Ambassador Academy this week (NATAA) ... Md. , The NATAA “Ag Academy” is ... a special project of the National FFA Foundation ... (NAAE) . The highly recommended agriscience teachers, who ...
(Date:6/18/2013)... ATLANTA , June 18, 2013  regulated information ... Jeff Klauk today announced the launch of ... their loved ones. The Pledge ... take a stand and make a personal commitment to ... with their health care team and additional partial-onset seizure ...
(Date:6/18/2013)... Israel , June 18, 2013 ... Active Pharmaceutical Ingredients (APIs), generic and innovative intermediates, and finished ... that the company has been granted a United ... the US and Europe for the ... number 8,410,176 B2 is titled Intermediate Compounds and Processes ...
(Date:6/18/2013)... , June 18, 2013 ... has announced the addition of the ... Microspheres, & Nanoparticles], Devices [Disposables & Reusable, ... Auto Injectors] & Therapeutics [Diabetes & Oncology] ... to their offering.      (Logo: ...
Breaking Biology Technology:DuPont Sponsors National AgriScience Ambassador Academy 2DuPont Sponsors National AgriScience Ambassador Academy 3Professional Golfer Jeff Klauk Tees Off New Pledge Campaign for People Living with Epilepsy 2Professional Golfer Jeff Klauk Tees Off New Pledge Campaign for People Living with Epilepsy 3Professional Golfer Jeff Klauk Tees Off New Pledge Campaign for People Living with Epilepsy 4Professional Golfer Jeff Klauk Tees Off New Pledge Campaign for People Living with Epilepsy 5Professional Golfer Jeff Klauk Tees Off New Pledge Campaign for People Living with Epilepsy 6Mapi Pharma Granted United States Patent for Pain Relief Medication "Tapentadol" 2Injectable Drug Delivery Market by Formulations, Devices & Therapeutics - Global Forecasts to 2017 2Injectable Drug Delivery Market by Formulations, Devices & Therapeutics - Global Forecasts to 2017 3
... Golub Capital today announced that it,has provided a GOLD ... by MTS Health Investors, LLC (MTS). GOLD financings are,proprietary ... not disclosed., DDC, based in Fairfield, Ohio, is ... worldwide and the market leader in human DNA,identification testing ...
... quarter 2007 to $201 million, SAN DIEGO, Oct. ... reported financial results for the quarter ended,September 30, 2008. ... third quarter, including net product sales of $201.4 million, ... loss for the quarter ended,September 30, 2008 was $77.7 ...
... SAN JOSE, Calif., Oct. 21 Canary Foundation, a,nonprofit ... its Scientific Program Director, Dr. Sanjiv Sam Gambhir, has,been ... Academies Institute of,Medicine (IOM). This is one of the ... IOM, established in 1970 by the National Academy of,Sciences, ...
Cached Biology Technology:Golub Capital Provides Debt Financing to Support the Acquisition of DNA Diagnostics Center, Inc. by MTS Health Investors, LLC 2Amylin Pharmaceuticals Reports Third Quarter Financial Results 2Amylin Pharmaceuticals Reports Third Quarter Financial Results 3Amylin Pharmaceuticals Reports Third Quarter Financial Results 4Amylin Pharmaceuticals Reports Third Quarter Financial Results 5Amylin Pharmaceuticals Reports Third Quarter Financial Results 6Amylin Pharmaceuticals Reports Third Quarter Financial Results 7Amylin Pharmaceuticals Reports Third Quarter Financial Results 8Canary Foundation's Dr. Sanjiv Sam Gambhir Elected to the National Academies Institute of Medicine 2
Sheep polyclonal to Melatonin ( Abpromise for all tested applications). Antigen: Melatonin Tg conjugate....
Goat polyclonal to DDDDK tag (FITC) ( Abpromise for all tested applications)....
...
DNA fragmentation factor & Inhibitor of CAD...
Biology Products: