Navigation Links
Corn's roots dig deeper into South America
Date:3/24/2008

Corn has long been known as the primary food crop in prehistoric North and Central America. Now it appears it may have been an important part of the South American diet for much longer than previously thought, according to new research by University of Calgary archaeologists who are cobbling together the ancient history of plant domestication in the New World.

In a paper published in the March 24 advanced online edition of the Proceedings of the National Academy of Sciences (PNAS), U of C PhD student Sonia Zarrillo and archaeology professor Dr. Scott Raymond report that a new technique for examining ancient cooking pots has produced the earliest directly dated examples of domesticated corn (maize) being consumed on the South American continent. Their discovery shows the spread of maize out of Mexico more than 9,000 years ago occurred much faster than previously believed and provides evidence that corn was likely a vital food crop for villages in tropical Ecuador at least 5,000 years ago.

The domestication and dispersal of maize has been a hot topic in archaeology for decades and these are the earliest indisputable dates for its presence in South America, Raymond said. It has long been thought that maize may have been used south of Panama at this time for ritual purposes but this shows it was also being consumed as food.

Raymond led the excavation of tropical village sites in western Ecuador in the early 1980s, which are the oldest known villages in the Americas. Using pottery fragments recovered from the sites, Zarrillo obtained the charred remnants of prehistoric meals and found they contained starch granules from domesticated corn.

Plant material typically does not preserve very well in tropical sites but it turns out that microscopic starch grains do survive very well over the years and can be used to identify exact species of plants, Zarrillo said. Analyzing starch from charred food residues is a new technique in archae
'/>"/>

Contact: Grady Semmens
gsemmens@ucalgary.ca
403-220-7722
University of Calgary
Source:Eurekalert

Page: 1 2

Related biology news :

1. How roots find a route
2. Using DNA, scientists hunt for the roots of the modern potato
3. Could hairy roots become biofactories?
4. Hungry microbes share out the carbon in the roots of plants
5. Smart flower bulbs pull themselves to deeper ground
6. Soybean varieties viable in southern Indiana, resistant to root-knot nematode
7. Northern right whales head south to give birth, leave genetic fingerprints with NOAA researchers
8. e-SMART Technologies Continues Delivery of Its New Super SMART Card in South Korea
9. Voyage to Southern Ocean aims to study air-sea fluxes of greenhouse gases
10. e-Smart(R) Technologies Delivers Its New Super Smart Card(TM) in South Korea.
11. Antarctic expedition provides new insights into the role of the Southern Ocean for global climate
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/9/2015)... , July 07, 2015 ... the addition of the "Biometrics for Banking; ... 2015-2020" report to their offering. ... contributor to this growth and the forecast is ... in revenue for companies involved in delivering biometric ...
(Date:7/8/2015)... 2015  Trovagene, Inc. (NASDAQ: TROV ), ... the launch of a study that aims to ... (PCM) technology for predicting response to treatment in ... of the novel immunotherapy agents Yervoy® (ipilumumab), a ... The 50-patient study will be led by researchers ...
(Date:7/2/2015)... June 25, 2015 ... addition of the "Natural Language Processing Market ... IVR, OCR, Pattern & Image Recognition) - Worldwide ... The key vendors occupying the market ... Corporation, Microsoft Corporation, NetBase Solutions, SAS Institute Inc., ...
Breaking Biology News(10 mins):Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 2Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 3Trovagene Initiates Study to Monitor Response to Immunotherapy in Melanoma Patients Using its Precision Cancer Monitoring Platform 2Trovagene Initiates Study to Monitor Response to Immunotherapy in Melanoma Patients Using its Precision Cancer Monitoring Platform 3Trovagene Initiates Study to Monitor Response to Immunotherapy in Melanoma Patients Using its Precision Cancer Monitoring Platform 4Natural Language Processing Market by Type (Rule-Based, Statistical, and Hybrid), Technologies (Recognition, IVR, OCR, Pattern & Image Recognition) - Worldwide Forecast to 2020 2
... ... Technology, TUSTIN, Calif., ... with isochronous data transfer,support. The SX-2000WG+ allows streaming video and audio ... Windows and,Macintosh users over an 802.11b/g wireless network or an Ethernet ...
... rocks and cause anglers to slip while fly fishing contain oil ... University microbiologist. Drivers can,t pump algal fuel into their gas ... He felt that way 20 years ago. He feels that way ... been so short-sighted," Cooksey said. Cooksey is one of many ...
... headed by an environmental engineer at Washington University in St. ... ethanol. , The ... plant biomass parts that range from woody stems, straw, agricultural residues, ... some lignin. , ...
Cached Biology News:Silex Introduces World's First Wireless USB Device Server With Streaming Video and Audio Data Transfer 2Montana State University researcher finds renewed interest in turning algae into fuel 2Montana State University researcher finds renewed interest in turning algae into fuel 3New techniques create butanol 2
(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:7/31/2015)... In today,s fast changing healthcare environment, ... positive health outcomes, improve profitability and enhance their ... in their communities. At ThoughtSpot 2015, Good ... announced a new set of innovative capabilities that ... help independent pharmacies endure the industry,s most pressing ...
(Date:7/30/2015)... ... July 31, 2015 , ... Ralco is honored to announce ... Lyon County Fair to be held August 5-9 in Marshall. The Ralco Enrichment Center ... come from and how agriculture impacts their daily lives. This unique exhibit also features ...
(Date:7/30/2015)... ... July 30, 2015 , ... The 2015 Market Research Report on the ... of the global Propanol market with a focus on the Chinese situation. Major companies ... Chemicals, Oxea, ISU Chemical, Sanofi, Royal Dutch Shell, LG Chem and Zhejiang Xinhua Chemical. ...
Breaking Biology Technology:Intrexon to Announce First Half and Second Quarter 2015 Financial Results and Host Conference Call on August 10th 2AmerisourceBergen Unveils Suite of Enhanced Capabilities for Independent Pharmacies at ThoughtSpot 2015 2AmerisourceBergen Unveils Suite of Enhanced Capabilities for Independent Pharmacies at ThoughtSpot 2015 3Ralco Announces Primary Sponsorship of Ralco Enrichment Center at Lyon County Fair 2Global Propanol Market Technical Data and Manufacturing Analysis 2020 2Global Propanol Market Technical Data and Manufacturing Analysis 2020 3
... Development of Gene Expression Signatures Derived by COXEN ... Molecular Test of Responsiveness to Current Treatments, ... Transgenomic (OTC Bulletin Board: TBIO) today announced a ... test which will guide,clinicians in their choice of ...
... Intact Medical Corporation, an,emerging leader in the development ... and removal of breast lesions, today announced,that it ... 510(k),clearance for the Intact (R) Excise XL - ... wands, used with the Intact (R) Breast Lesion ...
... Ardea Biosciences, Inc.,(Nasdaq: RDEA ) announced today ... its lead product candidate for the treatment of ... mitogen-activated ERK kinase,(MEK) inhibitor for the treatment of ... College of American College of Rheumatology,(ACR) / Association ...
Cached Biology Technology:Transgenomic Announces Partnership With Key Genomics for Ovarian Cancer Assay to Guide Therapeutic Options 2Transgenomic Announces Partnership With Key Genomics for Ovarian Cancer Assay to Guide Therapeutic Options 3Transgenomic Announces Partnership With Key Genomics for Ovarian Cancer Assay to Guide Therapeutic Options 4Intact Medical Corporation's Intact(R) Excise XL Receives 510(K) Marketing Clearance from the FDA 2Ardea Biosciences to Present Data on Gout and Inflammation Programs at the 2008 ACR/ARHP Annual Scientific Meeting 2Ardea Biosciences to Present Data on Gout and Inflammation Programs at the 2008 ACR/ARHP Annual Scientific Meeting 3
See product name for description....
Panomer 9 oligodeoxynucleotides are random primers that are labeled at the 5' end with our proprietary QSY 7 dye and they are useful for assessing microarray spot morphology, hybridization potential ...
... excluding l-[U-14C]methionine, 1.85 MBq, 50 uCi. ... > 1.85 GBq/mg atom carbon, ... Mixture of Ala, Arg, Asp, Glu, ... Pro, Ser, Thr, Tyr and Val.1.85 ...
Topoisomerase I, isolated from wheat germ, is an enzyme capable of removing negative supercoils from covalently closed circular DNA (1)....
Biology Products: