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:7/30/2015)... MOUNTAIN VIEW, Calif. , July 30, 2015 ... products and services for gene function analysis and ... CRISPR Guide RNA (sgRNA) Knockout Library targeting all ... to specifically and permanently "knock out" a gene,s ... library provides a high throughput screening tool so ...
(Date:7/23/2015)... Aware, Inc. (NASDAQ: AWRE ), a leading ... for its second quarter ended June 30, 2015.  ... million, a decrease of 33% compared to $6.8 million in ... quarter of 2015 was $0.3 million, or $0.01 per diluted ... share, in the same period a year ago.  ...
(Date:7/21/2015)... July 21, 2015  NXT-ID, Inc. (NASDAQ: ... authentication company focused on the growing mobile commerce ... announces that it has filed provisional patent 62/192218 ... This invention highlights next generation ... an account, but also the user using unique ...
Breaking Biology News(10 mins):CELLECTA, INC. Announces Launch of Human Whole Genome CRISPR Knockout Library 2Aware, Inc. Reports Second Quarter 2015 Financial Results 2Aware, Inc. Reports Second Quarter 2015 Financial Results 3Aware, Inc. Reports Second Quarter 2015 Financial Results 4Aware, Inc. Reports Second Quarter 2015 Financial Results 5Aware, Inc. Reports Second Quarter 2015 Financial Results 6NXT-ID Patents Personalized Tokenized Payments for Next Generation Secure Payment Technology 2NXT-ID Patents Personalized Tokenized Payments for Next Generation Secure Payment Technology 3NXT-ID Patents Personalized Tokenized Payments for Next Generation Secure Payment Technology 4
... spontaneous organised motion of a large number of individuals. It ... and groups of insects to shoals of fish, flocks of ... Lobaskin from University College Dublin, Ireland, have uncovered new collective ... EPJ B . Ultimately, this could be used to ...
... only species with a sweet tooth. Research from North Carolina ... Drosophila suzukii ) also prefers sweet, soft fruit giving ... the United States over the past four years and threatens ... U.S. fruit crops. "Because we know that D. ...
... an extinct Australian frog has been revived and reactivated by ... a "dead" cell nucleus into a fresh egg from another ... which uniquely swallowed its eggs, brooded its young ... became extinct in 1983., But the Lazarus Project team has ...
Cached Biology News:Study offers new insights on invasive fly threatening US fruit crops 2Lost frog DNA revived: Lazarus Project 2
(Date:8/3/2015)... (PRWEB) , ... August 03, 2015 , ... Nine field ... Iowa, Illinois and Indiana. Hosted by the Soil Health Partnership , the field ... lasting environmental benefits while potentially increasing farm productivity and income. , Brent Bible has ...
(Date:8/3/2015)... GERMANTOWN, Md. , Aug. 3, 2015   ... it will release first half and second quarter 2015 ... 10 th , 2015.  The Company will host a ... results and provide a general business update. ... (Domestic US) and 1-412-902-4262 (International), and asking to join ...
(Date:8/3/2015)... Kent, WA (PRWEB) , ... August 03, 2015 ... ... TLD3000 and TLD5000 diaphragm vacuum pumps to its comprehensive line of analytical laboratory ... stainless steel valves, these versatile pumps provide a chemically resistant and maintenance-free solution ...
(Date:7/31/2015)... China Cord Blood Corporation (NYSE: CO) ("CCBC" ... provider of cord blood collection, laboratory testing, hematopoietic stem ... that the Company has filed its Annual Report on ... The filed Form 20-F includes audited financial statements for ... 20-F can be accessed by visiting the U.S. Securities ...
Breaking Biology Technology:Soil Health Field Days Kick Off Throughout Midwest 2Soil Health Field Days Kick Off Throughout Midwest 3Intrexon to Announce First Half and Second Quarter 2015 Financial Results and Host Conference Call on August 10th 2Sterlitech Launches New Line of Vacuum Pumps 2China Cord Blood Corporation Files Its Annual Report on Form 20-F 2
... ... will take place on May 16-19, 2010 in Baltimore, MD, USA. This innovative ... their knowledge and experience in process development, crystallization, safety, scale-up, production, and emerging technologies. ... Columbia, MD ...
... Scientists at Queen,s University Belfast are developing new sensors to ... the fight against the threat of terrorist attacks. The ... or crime scene to gather a sample which is then ... of chemicals within seconds. This will allow better, faster decisions ...
... Batteries can power anything from small sensors to ... them smaller but even more powerful, problems can arise ... the devices themselves. University of Missouri researchers are developing ... more efficient. "To provide enough power, we need ...
Cached Biology Technology:17th International Process Development Conference to Feature Presentations on Safety, Process Development, Crystallization, PAT, Scale-Up and Production 2New technology detects chemical weapons in seconds 2Researchers create smaller and more efficient nuclear battery 2
ANTI-HUMAN CYTOKINES, GROWTH FACTORS (polyclonal rabbit (or goat) antibodies) Human TARC - Biotin...
Goat polyclonal to Factor VIII, prediluted ( Abpromise for all tested applications). Antigen: Full length native protein (purified) (Human): Factor VIII from blood. Entrez GeneID: 2157 Sw...
Chicken polyclonal to Thioredoxin domain containing 9 ( Abpromise for all tested applications). Antigen: Full length protein (Human) Entrez Gene ID: 10190 Swiss Protein ID: O14530...
Polyclonal antiserum raised against conjugated L-isoleucine. Available as antiserum. Amino Acid Antibodies...
Biology Products: