Navigation Links
Researchers find the earliest evidence of domesticated maize
Date:3/23/2009

out excavations in four of the 15 caves and rock shelters visited in the region, but only one of them yielded evidence for the early domestication of maize and squash.

Ranere excavated the site and recovered numerous grinding tools. Radiocarbon dating showed that the tools dated back at least 8700 years. Although grinding tools were found beneath the 8700 year level, the researchers were not able to obtain a radiocarbon date for the earliest deposits. Previously, the earliest evidence for the cultivation of maize came from Ranere and Piperno's earlier research in Panama where maize starch and phytoliths dated back 7600 years.

Ranere said that maize starch, which is different from teosinte starch, was found in crevices of many of the tools that were unearthed.

"We found maize starch in almost every tool that we analyzed, all the way down to the bottom of our site excavations," Ranere said. "We also found phytoliths that comes from maize or corn cobs, and since teosinte doesn't have cobs, we knew we had something that had changed from its wild form."

Ranere said that their findings also supported the premise that maize was domesticated in a lowland seasonal forest context, as opposed to being domesticated in the arid highlands as many researchers had once believed.

"For a long time, I though it strange that researchers argued about the location and age of maize domestication yet never looked in the Central Balsas River Valley, the homeland for the wild ancestor," said Ranere. "Dolores was the first one to do it.'


'/>"/>

Contact: Preston M. Moretz
pmoretz@temple.edu
215-204-4380
Temple University
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Pitt-led researchers create quick, simple fluorescent detector for TB
2. Einstein and Pitt researchers develop new TB test that will dramatically cut diagnosis time
3. University researchers to develop coatings that kill superbugs
4. K-State researchers work with university in Ghana to create biofuels from native tree seeds
5. Heinz Maier-Leibnitz Prizes 2009: Six young researchers recognized for outstanding achievements
6. Researchers identify genetic markers for aggressive head and neck cancer
7. Stanford researchers develop biodegradable substitutes for wood, plastic bottles and other materials
8. NASA researchers find clues to a secret of life
9. Carnegie Mellon researchers apply new statistical test
10. Regulatory molecule for tumor formation or suppression identified by Singapore, US researchers
11. K-State researchers help Epitopix license the United States first E. coli O157 vaccine for cattle
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Researchers find the earliest evidence of domesticated maize
(Date:4/20/2014)... growing in importance for both basic researchers and ... the University of Maryland have developed a new ... gene activity from RNA sequencing (RNA-seq) data., With ... speedy fish, estimates of gene expression that previously ... few minutes, with accuracy that equals or exceeds ...
(Date:4/20/2014)... corn crop residue to make ethanol and other biofuels ... than gasoline, according to a study published today in ... findings by a University of Nebraska-Lincoln team of researchers ... to meet federal mandates to ramp up ethanol production ... the stalks, leaves and cobs in cornfields after harvest ...
(Date:4/18/2014)... the past 20 years, researchers have published soil organic ... have suggested that soil organic carbon can be sequestered ... to no-till systems. However, there is a growing body ... and soybean rotations without cover crops, small grains, and ... at the published rates. , "Some studies have shown ...
Breaking Biology News(10 mins):Computational method dramatically speeds up estimates of gene expression 2Study casts doubt on climate benefit of biofuels from corn residue 2Study casts doubt on climate benefit of biofuels from corn residue 3Researchers question published no-till soil organic carbon sequestration rates 2Researchers question published no-till soil organic carbon sequestration rates 3Researchers question published no-till soil organic carbon sequestration rates 4
... Carnegie Mellon University,s M. Granger Morgan will unveil a ... can help society reduce dangerous greenhouse gas emissions and ... 9 at 1 p.m. at 1200 New York Ave. ... heads a team of investigators from Carnegie Mellon, the ...
... Philadelphia, PA As children transition from preschool-age to ... that may not meet current recommendations and may contribute ... January/February 2009 issue of the Journal of Nutrition ... that their pre-school children (2 to 5 years) had ...
... in the brain,s hippocampus, but what controls this birth has ... Science , neuroscientists at the Johns Hopkins University School ... which depends on brain activity, also depends on a protein ... genetic material. "How is it that when you ...
Cached Biology News:Carnegie Mellon to unveil new sequestration plan 2Eating habits and exercise behaviors in children can deteriorate early 2Growth of new brain cells requires 'epigenetic' switch 2
(Date:1/15/2014)... A study has been launched to test whether technology ... help to tackle the problem of obesity.  This unique healthcare ... based in Stowmarket) and academics at University Campus Suffolk is ... which is inspired by equipment used to collect data about ...
(Date:1/15/2014)... 2014 DTS Language Services, Inc . ... Portal for Life Science organizations who need document translations. ... matter of their documents in advance with a selection of ... of translations, often a critical factor in clinical and scientific ...
(Date:1/15/2014)... , Jan. 15, 2014 TaiGen Biotechnology Company, Limited ... agreement with R-Pharm, a leading Russian pharmaceutical company, to ... Russian Federation , Turkey ... States (CIS). Nemonoxacin is a novel antibiotic for the treatment ...
(Date:1/14/2014)... Communications, a leading provider of strategic communications services to corporations and ... the United States and Europe ... JD, is returning to the firm,s Washington, D.C. ... more than two years of service as Associate Commissioner for the ...
Breaking Biology Technology:Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 2Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 4DTS Improves Efficiency for Life Science Document Translations 2TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 2TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 4Former FDA Associate Commissioner Returns To 3D Communications 2
... are the words of the automated announcement that one used ... whenever the doors opened. The gap refers to the space ... through the American workplace today, I cant help thinking that ... the country. In this case, the gap to watch out ...
... The Milwaukee Brewers will soon have ... players at Miller Park, officials announced Thursday. , ,Eastman ... will provide a Directview CR 850 computer-operated ... will be used to generate high-resolution digital X-rays of ...
... award from Raj Veeramani, director of the E-Business Institute. ... is a brave new world of advertising, says Jerry Shereshewsky, ... University of Wisconsin student (and cohort of former Madison Mayor ... his impact on the future of business. He was a ...
Cached Biology Technology:Minding the Generation Gap 2Minding the Generation Gap 3Advertising ambassador explains the reinvention of marketing 2Advertising ambassador explains the reinvention of marketing 3
anti-dansyl, rabbit IgG fraction *1 mg/mL* Secondary Detection; Anti-Dye and Anti-Hapten Antibodies...
MOUSE ANTI RAT RT1Ac Immunogen: PHA activated rat lymphocytes...
Prepared in 0.85% saline....
TACS Apoptotic DNA Laddering Kits are used to assay cells and tissues for apoptosis by...
Biology Products: