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:9/23/2014)... rumens and termite guts for microbes that can efficiently ... next-generation biofuels, but some of the best microbial candidates ... report. , Their study , reported in the ... is the first to use biochemical approaches to confirm ... digest fiber, breaking it down into simple sugars in ...
(Date:9/23/2014)... Pattern formation is essential in the development of animals ... how can genetic information be translated in a reliable ... , The French-flag model of stripe formation is ... by the different colours of the French flag, is ... i.e. at high, middle or low concentrations of the ...
(Date:9/23/2014)... Research and Markets  has announced the ... Opportunities, 2019" report to their offering. ... security and protection in private as well as government ... government is focusing on using biometric systems to store ... IDs that are of crucial importance to the country. ...
Breaking Biology News(10 mins):Search for better biofuels microbes leads to the human gut 2Search for better biofuels microbes leads to the human gut 3Recreating the stripe patterns found in animals by engineering synthetic gene networks 2India Biometrics Market Forecast and Opportunities, 2019 2India Biometrics Market Forecast and Opportunities, 2019 3
... An improved technique for culturing cells, developed at the ... new, fundamental insights into the behavior of neuronal cells. ... a basic technique for measuring how they respond to ... tasks. Neuronal cells, which make up the central nervous ...
... "dead zone" has formed off the Oregon Coast for the ... State University. , A fundamental new trend in atmospheric and ... begun, scientists say, and apparently is expanding its scope beyond ... effect of the low-oxygen zone is also being seen in ...
... into rheumatoid arthritis (RA), a chronic inflammatory joint disease. ... RA has been linked to an inherited susceptibility. ... siblings seems to be random. , In ... patients with RA, researchers at the University of Michigan ...
Cached Biology News:Neuronal cell cultures kept on the straight and narrow 2Marine 'dead zone' off Oregon is spreading 2Marine 'dead zone' off Oregon is spreading 3New genes implicated in rheumatoid arthritis 2
(Date:9/23/2014)... , Sept. 23, 2014 News ... India devoted to genome-based research for ... Genomics (NIBMG) is taking a bite out of oral ... among males in India with the ... solutions from DataDirect Networks (DDN). , To fuel its ...
(Date:9/23/2014)... , Sept. 23, 2014   GenoSpace , ... comprehensive suite of tools to enable the broad use ... announced that it has been awarded Phase I of ... from the National Institutes of Health (NIH) to enable ... Logo - http://photos.prnewswire.com/prnh/20140922/147649 ...
(Date:9/23/2014)... Dr. Williams says, “Find The Black Box ... a three phase process that can lead to the ... would go far beyond anything previously imagined. First everyone ... healthcare.” , “Every effort to improve the quality of ... progress throughout that system because all of the experts ...
(Date:9/22/2014)... who were treated with a statin in the hospital ... likely to survive than those who were not, according ... . This study was conducted by the same researchers ... can improve survival in victims of ischemic stroke., Ischemic ... a blood vessel that blocks blood from reaching areas ...
Breaking Biology Technology:National Institute of Biomedical Genomics (NIBMG) Deploys DataDirect Networks Storage to Achieve Significant Performance Improvement in World-Class Genomics Research and Collaboration for Oral Cancer 2National Institute of Biomedical Genomics (NIBMG) Deploys DataDirect Networks Storage to Achieve Significant Performance Improvement in World-Class Genomics Research and Collaboration for Oral Cancer 3National Institute of Biomedical Genomics (NIBMG) Deploys DataDirect Networks Storage to Achieve Significant Performance Improvement in World-Class Genomics Research and Collaboration for Oral Cancer 4National Institute of Biomedical Genomics (NIBMG) Deploys DataDirect Networks Storage to Achieve Significant Performance Improvement in World-Class Genomics Research and Collaboration for Oral Cancer 5GenoSpace Awarded Fast Track SBIR Grant to Enable Data Access and Cohort Construction for Biorepositories 2Dr. Ira Williams Offers the Healthcare Solution Necessary for Patient Safety Improvement 2Statin use during hospitalization for hemorrhagic stroke associated with improved survival 2
... a talk entitled There,s Plenty of Room at the Bottom. ... humans couldn,t manipulate atoms. However, if atomic manipulation is ... How do you know what you have done" , ... IBM and Imago have taken a seminal step along the ...
... Industrial Originally Certified ISO in January 2003 - ... Company They Audited Performed at Such a ... High Quality Level" ... Company Dedicated to Quality, IRVING, Texas, Sept. 6 Carrington,Laboratories, Inc. (Pink Sheets: ...
... Philip Young, Chief Executive Officer,of Osteologix, Inc. ... featured in an exclusive interview with http://www.wallst.net ... 6 at 11 a.m. EDT. The interview will,be ... EDT on September 6. The interview will ...
Cached Biology Technology:IBM and Imago find a crucial difficulty in semiconductor device scaling 2Carrington Reports on ISO 9001:2000 Inspection at Sabila Industrial in Costa Rica 2Carrington Reports on ISO 9001:2000 Inspection at Sabila Industrial in Costa Rica 3WallSt.net (www.wallst.net) Announces Upcoming Interview With CEO of Osteologix 2
...
Recalibration of HL-2000-CAL products...
Mature rat whole blood (Sprague-Dawley, averaging 7-8 weeks of age, either sex) is collected at the time of slaughter and processed within 45 minutes. It is then filtered through gauze, pooled in an ...
Several Pichia pastoris strains are available to allow you to optimize expression and recovery of your protein of interest. Table 1 provides information to help you choose the appropriate strain....
Biology Products: