Navigation Links
Biologists find regions of rice domestication

Biologists from Washington University in St. Louis and their collaborators from Taiwan have examined the DNA sequence family trees of rice varieties and have determined that the crop was domesticated independently at least twice in various Asian locales.

Jason Londo, Washington University in Arts & Sciences biology doctoral candidate, and his adviser, Barbara A. Schaal, Ph.D., Washington University Spencer T. Olin Professor of Biology in Arts & Sciences, ran genetic tests of more than 300 types of rice, including both wild and domesticated, and found genetic markers that reveal the two major rice types grown today were first grown by humans in India and Myanmar and Thailand (Oryza sativa indica) and in areas in southern China (Oryza sativa japonica).

A paper describing the research was published June 9, 2006, in the on-line issue of the Proceedings of the U.S. National Academy of Science.

"We look where the genetic signature of clusters on a haplotype tree (family tree)," explained Londo. "We chose samples across the entire range of rice and looked for DNA sequences that were shared by both wild and domesticated types. These two major groups clustered out by geography."

DNA is comprised of vast, varied combinations of chemical subunits known as base pairs. Londo, Schaal and their collaborators concentrated on finding genetic markers shared by both cultivated and wild rice types that ranged from 800 to 1,300 base pairs.

Cultivated rice has a genetic signature that defines it as cultivated, Schaal explained.

"What you do is go out and sample all the wild rice across regions and you look for that signature in the wild," said Schaal, who has done similar work with cassava and jocote, a tropical fruit. "You find that the unique signature of cultivated rice is only found in certain geographic regions. And that's how you make the determination of where it came from."

Schaal said that she was surprised a
'"/>

Source:Washington University in St. Louis


Page: 1 2

Related biology news :

1. Biologists discover why 10% of Europeans are safe from HIV
2. Biologists determine genetic blueprint of social amoeba
3. Biologists Crack Genetic Code for Specialized Spider Silk
4. Biologists discover new pathway into plant cells
5. Biologists visualize protein interaction that may initiate viral infection
6. Biologists develop genome-wide map of miRNA-mRNA interactions
7. How healthy is that marsh? Biologists count parasites
8. Biologists probe the machinery of cellular protein factories
9. Biologists call for better choice of model organisms in evo-devo
10. Biologists produce global map of plant biodiversity
11. Biologists prove critical step in membrane fusion
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Biologists find regions rice domestication

(Date:9/19/2014)... Nxt-ID, Inc. (Nasdaq: NXTD and NXTDW) ... growing m-commerce market, updates the "Wocket in Your Pocket" celebrity ad ... light middleweight weight classes, Vinny Pazienza (PAZ). ... Game of Thrones actor Ciaran Hinds and ... Katey Sagal have been cast in Bleed for ...
(Date:9/18/2014)... A new GSA Bulletin study uses tree ... Puerco and Chaco Wash in northern New Mexico, USA. ... cedar and willow, investigators were able to precisely date ... then combined this data with aerial imagery, LiDAR, longitudinal ... these arroyos. , Arroyos are deep, oversized channels that ...
(Date:9/18/2014)... SAN ANTONIO, September 18, 2014 New research into ... which causes a severe hemorrhagic disease in humans similar ... factors essential for CCHFV infection. This discovery has the ... against the pathogen. , The research, reported ... PLoS Pathogens and conducted by scientists at the ...
Breaking Biology News(10 mins):NXT-ID's Vinny Paz Celebrity Ad Wocket Update: Katey Sagal and Ciaran Hinds Attached to His Upcoming Movie 2NXT-ID's Vinny Paz Celebrity Ad Wocket Update: Katey Sagal and Ciaran Hinds Attached to His Upcoming Movie 3Tree rings and arroyos 2Tree rings and arroyos 3Tree rings and arroyos 4Tree rings and arroyos 5Tree rings and arroyos 6Tree rings and arroyos 7Research milestone in CCHF virus could help identify new treatments 2
... Recent nationwide outbreaks of food-borne illnesses have triggered ... confidence. A symposium at the University of Minnesota ... food-safety issue. The conference, "How Safe is ... take place beginning at 1:30 p.m. Wednesday, April ...
... Commerce Department,s National Institute of Standards and Technology ... process for manufacturing integrated circuits at the nanometer ... to develop a method for engineering the first-ever ... As described in a paper published ...
... RELEASE, 31 March 2009] Researchers at the Swedish medical ... of the brain,s frontal and parietal parts, to increase the ... how the billions of neurons in the brain interact. One ... is a mechanism in the brain,s neuronal network that restricts ...
Cached Biology News:NIST-Cornell team builds world's first nanofluidic device with complex 3-D surfaces 2NIST-Cornell team builds world's first nanofluidic device with complex 3-D surfaces 3NIST-Cornell team builds world's first nanofluidic device with complex 3-D surfaces 4Computer simulations explain the limitations of working memory 2
(Date:9/19/2014)... Sept. 19, 2014  Nektar Therapeutics (NASDAQ: ... studies characterizing the analgesic profiles of a series ... receptor agonist molecules. The preclinical research candidates were ... platform. The analgesic properties of kappa ... literature. 1,2 Kappa opioid receptors are expressed ...
(Date:9/19/2014)... September 19, 2014 Barnhardt Manufacturing ... Label for its Organic Cotton . The USDA ... of renewable biobased ingredients meets or exceeds levels set ... composed in whole or in significant part of agricultural, ... allow our Organic cotton to be immediately identified as ...
(Date:9/19/2014)... ROCKLAND, Massachusetts , September 19, 2014 ... with the 53rd European Society for Paediatric Endocrinology (ESPE) ... advancement of science and medical research in the field ... of Merck KGaA, Darmstadt, Germany , ... Growth Innovation (GGI) for 2014. The awards were announced ...
(Date:9/18/2014)... TX (PRWEB) September 18, 2014 ... integrated urological and interventional radiology products and services, ... known as cryotherapy and cryoablation) versus external beam ... Section of the American Urological Association (MAAUA) Annual ... , "Comparing Relative Effectiveness of Cryosurgery and External ...
Breaking Biology Technology:Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 2Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 3Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 4Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 5Barnhardt Manufacturing Company Earns USDA Certified Biobased Product Certification and Label for Organic Cotton 2EMD Serono Awards Grant for Growth Innovation (GGI) for the First Time 2EMD Serono Awards Grant for Growth Innovation (GGI) for the First Time 3HealthTronics Announces Data Comparing Cryotherapy Versus Radiation for Treating Prostate Cancer Poster Presented at the American Urological Association Regional Meeting 2
... REDWOOD CITY, Calif., Aug. 5 Ingenuity ... life science researchers,today introduced Ingenuity Analysis Services, ... ,omics data related to,compound profiling, target identification, ... are designed to meet the needs of ...
... second quarter stock repurchase program and positive cash flow from ... ... (Nasdaq: AMCS ), a,leader in radiology and medical image and information ... 2008., (Logo: http://www.newscom.com/cgi-bin/prnh/20060202/AMICASLOGO ), Q2 ...
... Quarterly Dacogen Royalty Revenue Increases 76% from Same ... SuperGen, Inc.,(Nasdaq: SUPG ), a pharmaceutical ... of therapies for solid tumors and,hematological malignancies, today ... months ended June 30, 2008., Total revenues ...
Cached Biology Technology:Ingenuity Systems Launches Analysis Services 2AMICAS Reports Financial Results for the Second Quarter Ended June 30, 2008 2AMICAS Reports Financial Results for the Second Quarter Ended June 30, 2008 3AMICAS Reports Financial Results for the Second Quarter Ended June 30, 2008 4AMICAS Reports Financial Results for the Second Quarter Ended June 30, 2008 5AMICAS Reports Financial Results for the Second Quarter Ended June 30, 2008 6AMICAS Reports Financial Results for the Second Quarter Ended June 30, 2008 7AMICAS Reports Financial Results for the Second Quarter Ended June 30, 2008 8AMICAS Reports Financial Results for the Second Quarter Ended June 30, 2008 9AMICAS Reports Financial Results for the Second Quarter Ended June 30, 2008 10AMICAS Reports Financial Results for the Second Quarter Ended June 30, 2008 11AMICAS Reports Financial Results for the Second Quarter Ended June 30, 2008 12SuperGen Reports 2008 Second Quarter Financial Results 2SuperGen Reports 2008 Second Quarter Financial Results 3SuperGen Reports 2008 Second Quarter Financial Results 4SuperGen Reports 2008 Second Quarter Financial Results 5SuperGen Reports 2008 Second Quarter Financial Results 6SuperGen Reports 2008 Second Quarter Financial Results 7SuperGen Reports 2008 Second Quarter Financial Results 8SuperGen Reports 2008 Second Quarter Financial Results 9SuperGen Reports 2008 Second Quarter Financial Results 10SuperGen Reports 2008 Second Quarter Financial Results 11SuperGen Reports 2008 Second Quarter Financial Results 12SuperGen Reports 2008 Second Quarter Financial Results 13
... scale-up, these culture chambers produce cell yields ... range and are useful alternatives to ... High mechanical • strength and structural integrity ... • Certified nonpyrogenic and sterilized by gamma ...
Mouse monoclonal antibody to QARS - glutaminyl-tRNA synthetase...
... thermostable DNA polymerase obtained by high level ... in E. coli, Concentration: 5U/ul, Applications: Standard ... Scientific, the world leader in serving science. ... the world healthier, cleaner and safer by ...
ABgene® supplies a 94kDa ultra-pure recombinant thermostable DNA polymerase obtained by high level expression of the Taq DNA polymerase gene in E. coli....
Biology Products: