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  

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:4/22/2014)... presented Beaumont Health System with prestigious, competitive research ... athletic and nonathletic injuries. , The American ... grant to fund stem cell-based research that could ... ruptured knee anterior cruciate ligament, or ACL. According ... cruciate ligament injury is the over-stretching or tearing ...
(Date:4/22/2014)... a trip to Asia to coordinate with allies ... officials at the Office of Naval Research (ONR) ... (APTEP) as an example of strong and growing ... in the region. , The APTEP program, centered ... supports the development of alternative energy technologies. It ...
(Date:4/22/2014)... how communities can protect themselves from worsening storms. ... New England and the Midwest providing practical and ... goal is to help communities begin the steps ... of Syntectic International, Portland, OR. "It,s important because ... beyond feeling paralyzed from the lack of local ...
Breaking Biology News(10 mins):Beaumont awarded grants to study sports-related injury treatment, improve recovery 2Full power: Alternative energy partnerships flourish in Asia 2Full power: Alternative energy partnerships flourish in Asia 3Minnesota projects offer hope and practical help to communities facing more extreme storms 2
... staff scientist at Carnegie,s Department of Embryology, has ... American Academy of Microbiology. Fellows are annually elected ... their records of scientific achievement and original contributions ... single-celled yeast Saccharomyces cerevisiae , Koshland has ...
... bomb plot was uncovered in London in August 2006, ... (S&T) looked to to find ways to not only ... to figure out what those liquids are. Now, S&T-sponsored ... possible solution. They have successfully tested a liquid ...
... CSC (NYSE: CSC ) announced today that ... Operations and Support Services Unrestricted contract by the Department ... indefinite-delivery/indefinite-quantity (IDIQ) contract covers a broad range of services, ... of BTF business and program units. The contract has ...
Cached Biology News:Carnegie's Doug Koshland elected Fellow of the American Academy of Microbiology 2Good liquid, bad liquid 2CSC Awarded Department of Defense Biometrics Contract 2
(Date:1/14/2014)... The largest international professional organization of scientists ... derivatives thereof has endorsed an educational program that ... challenges of adulterated herb and botanical products. ... The Society for Medicinal Plant and Natural Product ...
(Date:1/14/2014)... In recent years, growing suspicion about the ... development and promotion has led to unprecedented levels of ... concerns about the insidious impact of commercialization of research, ... to the world’s biggest pharmas for illegal marketing activities, ...
(Date:1/14/2014)... Jan. 14, 2014   Kinaxis ®, provider of RapidResponse ... sales and operations planning ( S&OP ) service, is proud ... , which will be held at the Hilton San Diego ... Kinaxis customer Elisabeth Kaszas , Director of Supply Chain ...
(Date:1/14/2014)... NY (PRWEB) January 14, 2014 During the ... now known as “The Doctor’s Plague.” In this time period, ... hands. This led, at times, to the death of vulnerable ... today don’t know that they may be unwittingly transmitting herpes ...
Breaking Biology Technology:World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 3World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 4World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 5World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 6World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 7World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 8The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3Event Alert: Kinaxis Customer to Present at the Biomanufacturing Summit "Supply Chain: Improving Network Effectiveness" 2Study: Fatigued Medical Interns Infect Their Patients with Herpes Viruses; The CBCD Sees a Parallel with “The Doctor’s Plague” 2Study: Fatigued Medical Interns Infect Their Patients with Herpes Viruses; The CBCD Sees a Parallel with “The Doctor’s Plague” 3
... - New Progression-Free Survival Data Support Picoplatin ... for Metastatic Castration-Resistant Prostate Cancer -- Results ... of Clinical Oncology,s 2009 Genitourinary Cancers Symposium ... Poniard Pharmaceuticals, Inc. (Nasdaq: PARD ...
... China, Feb. 25 /PRNewswire-Asia-FirstCall/ -- 3SBio Inc. (Nasdaq:, ... focused on researching,developing, manufacturing and marketing biopharmaceutical products, ... the fourth quarter and,full year ended December 31, ... 11, 2009. , Following ...
... and Sunflower Oils drive better restaurant menu optionsINDIANAPOLIS, Feb. ... significant milestone in North America with the reduction of ... fats over the past three years. Since the market ... by Dow AgroSciences, have replaced more than 340 million ...
Cached Biology Technology:Poniard Pharmaceuticals Announces New Efficacy and Safety Data from a Phase 2 Picoplatin Trial in Patients with Prostate Cancer 2Poniard Pharmaceuticals Announces New Efficacy and Safety Data from a Phase 2 Picoplatin Trial in Patients with Prostate Cancer 3Poniard Pharmaceuticals Announces New Efficacy and Safety Data from a Phase 2 Picoplatin Trial in Patients with Prostate Cancer 4Poniard Pharmaceuticals Announces New Efficacy and Safety Data from a Phase 2 Picoplatin Trial in Patients with Prostate Cancer 53SBio Inc. to Report 2008 Fourth Quarter and Full Year Earnings on March 11, 2009 2Heart Health Month Milestone: Half a Billion Pounds of Bad Fats Eliminated From North American Diet 2Heart Health Month Milestone: Half a Billion Pounds of Bad Fats Eliminated From North American Diet 3
Recombinant Rat Leptin, CF...
delta-like 1 homolog (Drosophila)...
... 71-18 mutS and ES1301 mutS are mismatch ... of these strains prevents repair of the ... high mutation efficiencies and making them helpful ... Altered Sites II Mutagenesis Systems. Both ES1301 ...
Request Info...
Biology Products: