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:10/28/2014)... differences in moving activity in a novel environment ... angling, according to an experimental study completed at ... Game and Fisheries Research Institute. The study used ... and authentic angling trials to analyse if behaviours ... reared in traditional and enriched hatchery rearing environments. ...
(Date:10/28/2014)... and citrus fruits and juices are associated with a ... research from the University of East Anglia (UEA). ... foods containing flavonols and flavanones (both subclasses of dietary ... cancer, the fifth-leading cause of cancer death among women. ... of 171,940 women aged between 25 and 55 for ...
(Date:10/27/2014)... are an indigenous species of the West Antarctic Peninsula ... Earth. Since 1950, the average annual temperature in the ... and 6 degrees Celsius during winter. , As ... dry, polar system to a warmer, sub-polar system with ... a connection between local weather conditions and the weight ...
Breaking Biology News(10 mins):Fish 'personality' linked to vulnerability to angling 2Tea and citrus products could lower ovarian cancer risk, new UEA research finds 2University of Delaware study connects penguin chick weights to local weather conditions 2University of Delaware study connects penguin chick weights to local weather conditions 3
... they used fluorescent molecules to "tag" DNA and monitor a ... rearranging genetic material in some types of cells. ... light on how DNA loops form, but also might be ... shuffle genetic material, such as HIV. Until now, scientists ...
... more DNA regions linked to type 2 diabetes have been ... to over 60. The study provides a fuller picture ... with some clear patterns emerging. The international team, ... Institute of Harvard and MIT, and the University of Michigan, ...
... affordable and accessible, we need to pay more attention to ... and the fact that we don,t yet understand what ... Hastings Center Report . The authors are current or former ... Most analyses of the ethical issues raised by whole ...
Cached Biology News:Scientists use light to 'tag and track' genetic processes 210 new diabetes gene links offer picture of biology underlying disease 210 new diabetes gene links offer picture of biology underlying disease 3Prenatal whole genome sequencing: Just because we can, should we? 2Prenatal whole genome sequencing: Just because we can, should we? 3
(Date:10/27/2014)... BOSTON, MA (PRWEB) October 27, 2014 ... and profit. SoundConnect , an industry leading ... for its partners and agents to deliver cloud-based ... and accelerate growth opportunities. , With SoundConnect’s ... for every twenty-five video and/or web conferencing licenses ...
(Date:10/27/2014)... 27, 2014 The report “Smart ... Traffic Management, Communication, Monitoring), and by Display (Variable ... 2019” segments the global market into various sub-segments ... also identifies the drivers and restraints for this ... , Browse 75 market tables and 37 figures ...
(Date:10/27/2014)... Pa. , Oct. 27, 2014 ... Foundation of America (CCFA) announced today the launch ... , an educational campaign designed to ... diseases (IBD) on the paired role of nutrition ... To view the multimedia assets associated with this ...
(Date:10/26/2014)... 26, 2014 The report "Data ... Network Security Equipment, WAN Optimization Appliances]: Global Advancements, ... the data center networking market into various segments ... The report also identifies the factors driving this ... it along with the future roadmaps. , Browse ...
Breaking Biology Technology:SoundConnect Unveils Q4 Partner Incentives 2Smart Highway Market by Technology, and Display Expected to Reach $27.992.0 Million by 2019- New Report by MarketsandMarkets 2Smart Highway Market by Technology, and Display Expected to Reach $27.992.0 Million by 2019- New Report by MarketsandMarkets 3Smart Highway Market by Technology, and Display Expected to Reach $27.992.0 Million by 2019- New Report by MarketsandMarkets 4Celebrity Cook Sunny Anderson Teams Up With Janssen And Crohn's & Colitis Foundation Of America To Launch Educational Campaign 2Celebrity Cook Sunny Anderson Teams Up With Janssen And Crohn's & Colitis Foundation Of America To Launch Educational Campaign 3Celebrity Cook Sunny Anderson Teams Up With Janssen And Crohn's & Colitis Foundation Of America To Launch Educational Campaign 4Data Center Networking Market by Ethernet Switches, SAN & Routers Worth $21.85 Billion by 2018 - New Report by MarketsandMarkets 2Data Center Networking Market by Ethernet Switches, SAN & Routers Worth $21.85 Billion by 2018 - New Report by MarketsandMarkets 3Data Center Networking Market by Ethernet Switches, SAN & Routers Worth $21.85 Billion by 2018 - New Report by MarketsandMarkets 4
... news item is out of step with public opinion in ... state of Wisconsin grants $1 million and loans another $1 ... UW-Madison researcher so renowned that the words "Nobel Prize" practically ... drug discovery. , ,• The National Institutes of Health, the ...
... records have led to some adoption of the technology but ... ,Then Hurricane Katrina slammed into the Gulf Coast, destroying countless ... ,Katrina, and her followup Rita, may not only have changed ... focus of debate on electronic healthcare records. It is becoming ...
... -- Research scientist Seth Dobrin, Ph.D., has been named ... Genotyping Service of the Marshfield Clinic Research Foundation. , ,He ... to problems of mental health and development of new genetic ... discoveries he made earlier in his career as well as ...
Cached Biology Technology:Stem cell bank announcement validates quality of Wisconsin research 2Stem cell bank announcement validates quality of Wisconsin research 3Katrina's destruction likely to speed up electronic healthcare records adoption 2Katrina's destruction likely to speed up electronic healthcare records adoption 3Katrina's destruction likely to speed up electronic healthcare records adoption 4
Request Info...
... Biosearch Technologies has been at the ... accelerate the discovery and application of ... FRET probes and primers or 100 ... applications, Biosearch can meet your most ...
... Protein Concentration Basement Membrane Extract Cultrex ... in vivo applications where higher protein ... gel strength, and elevated levels of ... advantage of lot-to-lot consistency and controlled ...
Cultrex 3D Culture Matrix Laminin I....
Biology Products: