Navigation Links
Population genetics reveals shared ancestries
Date:5/24/2011

More than just a tool for predicting health, modern genetics is upending long-held assumptions about who we are. A new study by Harvard researchers casts new light on the intermingling and migration of European, Middle Eastern and African and populations since ancient times.

In a paper titled "The History of African Gene Flow into Southern Europeans, Levantines and Jews," published in PLoS Genetics, HMS Associate Professor of Genetics David Reich and his colleagues investigated the proportion of sub-Saharan African ancestry present in various populations in West Eurasia, defined as the geographic area spanning modern Europe and the Middle East. While previous studies have established that such shared ancestry exists, they have not indicated to what degree or how far back the mixing of populations can be traced.

Analyzing publicly available genetic data from 40 populations comprising North Africans, Middle Easterners and Central Asians were doctoral student Priya Moorjani and Alkes Price, an assistant professor in the Program in Molecular and Genetic Epidemiology within the Department of Epidemiology at the Harvard School of Public Health.

Moorjani traced genetic ancestry using a method called rolloff. This platform, developed in the Reich lab, compares the size and composition of stretches of DNA between two human populations as a means of estimating when they mixed. The smaller and more broken up the DNA segments, the older the date of mixture.

Moorjani used the technique to examine the genomes of modern West Eurasian populations to find signatures of Sub-Saharan African ancestry. She did this by looking for chromosomal segments in West Eurasian DNA that closely matched those of Sub-Saharan Africans. By plotting the distribution of these segments and estimating their rate of genetic decay, Reich's lab was able to determine the proportion of African genetic ancestry still present, and to infer approximately when the We
'/>"/>

Contact: David Cameron
david_cameron@hms.harvard.edu
617-432-0441
Harvard Medical School
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Growing seal population threatens small-scale fishing
2. Collective conservation efforts boosted rhino population in Nepal
3. Worlds reef fishes tussling with human overpopulation
4. Some populations of Fraser River salmon more likely to survive climate change: UBC study
5. Butterfly study reveals traits and genes associated with establishment of new populations
6. Tahoe native fish population declines sharply, invasives on the rise
7. New Healthcare Franchise Opportunity Focuses on Treating Exploding Senior Population
8. Notre Dame research offers important clues about grasshopper population explosions
9. Wolverine population threatened by climate change
10. Turtle populations affected by climate, habitat loss and overexploitation
11. Wild rainbow trout critical to health of steelhead populations
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/11/2015)... Ohio , May 11, 2015  Through a well-rounded ... Ohio had a strong showing at AUVSI,s Unmanned ... These representatives of Ohio,s UAS industry ... and abroad from all points along the UAS ecosystem. ... Development Coalition,s (DDC) Vice President for Aerospace Rich Knoll ...
(Date:5/8/2015)... 2015 Synaptics Inc. (NASDAQ: SYNA ), the ... of the executive management team will present at the following ... and Telecom Conference Date: May 18, 2015 Time: ... MA Cowen and Company Technology, Media ... Location: The New York Palace Hotel, New York, ...
(Date:5/5/2015)... 2015, NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" ... growing mobile commerce market, reminds investors and media that  Mr. ... presenting  at CARTES SECURE CONNEXIONS AMERICA 2015, held in ... The three-day conference is organized into a series of ... themed Global Fraud: Where is the Trust in Cyberspace? ...
Breaking Biology News(10 mins):Ohio Flies High at Unmanned '15, Sets Stage for Ohio UAS Conference 2Synaptics to Present at Upcoming Investor Conferences 2NXT-ID, Inc.'s CTO, David Tunnell, Presents at CARTES SECURE CONNEXIONS AMERICA 2015 Today in Washington DC. 2NXT-ID, Inc.'s CTO, David Tunnell, Presents at CARTES SECURE CONNEXIONS AMERICA 2015 Today in Washington DC. 3
... piece of information to be of any use, one must first ... Nowadays, there is often just too much of it. We are ... night, assisting us to find, digest and comprehend it. In this ... for a barrier-free accessibility of content that can be harvested, extracted, ...
... tiny goggles, scientists say they have learned that the ... stimuli, but also can "learn" time intervals and create ... a team at the Johns Hopkins University School of ... light on learning and memory-making, the investigators say, and ...
... and Ghent, Belgium, January 23, 2013 Hundreds of ... scheduled to convene in Ghent, Belgium, from June 25-28 ... (ICG-Europe 2013). The conference, co-organized by BGI and VIB, ... in plant and animal genomics, metagenomics, as well as ...
Cached Biology News:Pensoft Publishers integrate their journal platform with OpenAIRE 2Pavlov's rats? Rodents trained to link rewards to visual cues 2Pavlov's rats? Rodents trained to link rewards to visual cues 3Pavlov's rats? Rodents trained to link rewards to visual cues 4The 2013 International Conference on Genomics in Europe will take place in Ghent, Belgium 2
(Date:5/21/2015)... uBiome, the leading startup focused ... PicnicHealth, a healthcare company that collects and consolidates ... Bowel Disease (IBD) will receive a complementary PicnicHealth ... kit. Both companies were funded by Y Combinator ... more information on this partnership and how to ...
(Date:5/21/2015)... 2015 Patent Offering, The patent’s technology ... or therapeutic imaging within a body lumen (open space). ... having a low cost, single-use disposable illumination and camera ... October 18, 2013 and the patent approval was received ... physician to customize the lighting and magnification of the ...
(Date:5/21/2015)... - RepliCel Life Sciences Inc. (TSX.V: RP) (OTCQB: ... on the development of autologous cell therapies, announced ... Society for Cellular Therapy (ISCT) on RepliCel,s autologous ... a Phase 1/2 clinical trial.  The presentation, taking ... PM to 7:00 PM local time, will review ...
(Date:5/20/2015)... 20, 2015 Research and Markets ( ... "Top Technologies in HW_Technical Insights" report to their ... evaluated technology trends in the Health and Wellness sector ... to have an impact in the year 2015. The ... top 10 health and wellness technologies that are anticipated ...
Breaking Biology Technology:uBiome Partners with PicnicHealth 2uBiome Partners with PicnicHealth 3IpAuctions™ Presents The Worlds Smallest Disposable Illuminated Endoscope For Auction 2IpAuctions™ Presents The Worlds Smallest Disposable Illuminated Endoscope For Auction 3RepliCel to Present Unique Autologous Cell Treatment for Achilles Tendinosis at International Society for Cellular Therapy Conference 2RepliCel to Present Unique Autologous Cell Treatment for Achilles Tendinosis at International Society for Cellular Therapy Conference 3Top Technologies in the Health and Wellness Industry 2015 2
... KUNMING, China, Nov. 12 /Xinhua-PRNewswire-FirstCall/ -- China ... ("China Shenghuo" or the,"Company"), which is engaged ... pharmaceutical, nutritional supplement and cosmetic products,in the ... the NYSE Alternext,US LLC (formerly the American ...
... Pa., Nov. 12 GEL Interactive,Technologies, a Cadient ... Director, will be a featured speaker at the ... on Defining Appropriate,and Effective Interactions with Thought Leaders ... Forum provides a platform for attendees to interact,and ...
... Nov. 12 Phosphagenics,Limited ("Phosphagenics") (ASX: POH; OTCQX: ... phase 1 human clinical trial using its ... delivery of a leading non steroidal,anti-inflammatory drug ... and penetration of the topically applied Voltaren(R) ...
Cached Biology Technology:NYSE Alternext US Accepts China Shenghuo's Compliance Plan for Continued Listing 2NYSE Alternext US Accepts China Shenghuo's Compliance Plan for Continued Listing 3NYSE Alternext US Accepts China Shenghuo's Compliance Plan for Continued Listing 4Cadient Group's GEL Interactive Technologies to Present and Exhibit at CBI's 5th Annual Forum 2Transdermal Diclofenac enters Phase 1 Clinical Trial in Humans 2
The HQ505, 20 OptiGreen filter for the Molecular Imager FX is a band pass filter used for detection of Cy2 and FITC with 532 nm excitation....
... The APO-BRDU Kit is a 2-color staining ... cellular DNA to detect apoptotic cells by ... and reagents required for measuring apoptosis in ... for assessing reagent performance; washing, reaction and ...
... The ApopTag Red In Situ ... situ by the indirect TUNEL method, ... rhodamine fluorochrome. The kit provides indirect ... are analyzed using either fluorescence microscopy ...
The sample holders for gels are used to hold gels in place in the multi-sample tray I, which is used with Molecular Imager FX imaging systems....
Biology Products: