加拿大和美国零售市场上出售的甜玉米的转基因调查结果

[reine02]

市场调查结果表明： 用PCR法检测市场上的新鲜、冷冻、罐装甜玉米，加拿大的调查发现43个样本里有15个是转基因；美国七个州71个样本里只有2个是转基因，其中一个来自加拿大。

一。加拿大

Tests Discover Unlabelled GM Sweet Corn in Canadian Grocery Stores and Farmers’ Markets

(Please note: No samples were tested from Metro stores)

October 23, 2013 Ottawa – Tests have found unlabelled genetically modified (GM) sweet corn in grocery stores, roadside stands and farmers’ markets across Canada, says the Canadian Biotechnology Action Network (CBAN).

“Our testing clearly shows GM sweet corn is present in Canada,” said Lucy Sharratt of CBAN. “The high number of positive results in our small sample size alerts consumers to the fact that they could be unknowingly buying GM sweet corn. At the very least, GM sweet corn should be clearly labelled so consumers can make a choice.”

The purpose of CBAN’s test was to get an indication of the presence of genetically modified (also called genetically engineered) fresh sweet corn in Canada.

“Our sample size was small and random but shows a clear presence of GM sweet corn, across provinces and types of vendors,” said CBAN researcher Taarini Chopra. “The results don’t tell us how much of Canada’s sweet corn is GM, but they do tell us that it’s out there, in both grocery stores and farmers markets.”

CBAN tested 43 samples of conventional fresh, sweet corn. Half were from Ontario; the rest from BC, Alberta and Nova Scotia. The samples were purchased from outlets of major grocery chains (Loblaw, Walmart and Sobeys) as well as some smaller, independent grocery stores, farmers’ markets, and roadside stands.

15 of the 43 samples tested positive. This means that approximately 35% of these sweet corn samples were genetically modified.

GM sweet corn was discovered in samples purchased from Loblaw stores.
GM sweet corn was also present in samples from farmers markets and roadside stands.
Various samples from all 4 provinces where samples were collected - Ontario, BC, Nova Scotia and Alberta - tested positive.
Testing of samples from Sobeys and Walmart did not find GM sweet corn.
Results are not statistically significant but provide a snapshot of GM sweet corn in Canada, in the absence of mandatory GM food labelling and any government tracking, including statistics on GM crop cultivation.
The tests were conducted by CBAN staff, at Seeds of Diversity Canada's laboratory in Waterloo Ontario, using strip tests for the GM protein Cry1Ab.

Until recently, GM corn grown in Canada was predominantly field corn, which is used for animal feed, processed-food ingredients and biofuels. GM sweet corn is the first GM whole food grown in Canada, and raises new questions for consumers about possible health risks.

The sweet corn is genetically engineered with genes from the Bt bacteria to produce proteins that make it toxic to some insects.

“Some farmers might be planting GM sweet corn without knowing that it’s genetically modified, or being aware of the consumer concerns,” said Sharratt.

For more information: Lucy Sharratt, CBAN, 613 241 2267 ext 25; Taarini Chopra, CBAN, cell 226 606 8240. www.cban.ca/corn

http://www.cban.ca/Press/Press-Rele...n-Canadian-Grocery-Stores-and-Farmers-Markets

 

[reine02]

二 美国

Multi-state investigation finds GMO sweet corn is rare in U.S. stores

Background and Introduction

As sweet corn crops arrived at grocery stores across the United States in the summer of 2013, we wanted to know: Was this the same corn on the cob we’ve been eating all our lives, or was it a new type of corn that has been genetically engineered to contain an insecticide and withstand herbicides? There was only one way to find out. Over a four-month period, Friends of the Earth gathered dozens of sweet corn samples from across the U.S. and tested them to determine if they were genetically engineered.

This is the first analysis of this scope and type to look for genetically engineered sweet corn available to consumers in grocery stores and farmers markets across the United States, and it was conducted during a pivotal time for the nation’s sweet corn crops.

Most genetically engineered crops grown and sold in the United States – including roughly 85 percent of field corn crops – end up in processed food or animal feed. Very little fresh produce sold in the U.S. has been genetically engineered, with the exception of a variety of papaya and a small amount of squash. While Syngenta has offered a genetically engineered sweet corn for about a decade, most farmers have opted not to grow it. But the sweet corn market may be changing.

In the fall of 2011, Monsanto began selling seedsi for its first direct-to-consumer genetically engineered product, Seminis® Performance Series™ sweet corn. The corn is a “stacked trait” product that contains multiple genetically engineered traits – three Bt-toxin insecticidal genes plus a “Roundup Ready” gene that makes the plant resistant to the herbicide glyphosate.ii

Monsanto stated it would initially target the new seeds at 250,000 acres of sweet corn.iii Press reports indicate the new sweet corn began entering stores in 2012.iv Our investigation aimed to determine the extent to which this GMO sweet corn had penetrated the U.S. consumer market by the 2013 corn-eating season.

Testing Methodology

Between June and September of 2013, Friends of the Earth worked with volunteers to gather fresh, frozen and canned sweet corn samples from seven states and the District of Columbia. Volunteers purchased non-organic corn at major retailers and farmers markets, taking precautions to avoid sample contamination (using gloves and plastic bags to handle corn and keeping samples separate in labeled freezer bags). They shipped the samples frozen, overnight, in insulated packaging so the samples would arrive frozen.

Friends of the Earth tested a total of 71 samples of sweet corn – 54 fresh, eight frozen and nine canned corn samples – from eight areas nationwide, including California, Colorado, Illinois, Massachusetts, Oregon, Vermont, Washington, D.C. and Washington State.

Kit for Cry1Ab Corn Leaf and Seed and followed testing protocols provided by the manufacturer.v This kit is designed to extract and detect the presence of the Cry1Ab Bt endotoxins at the levels typically expressed in genetically modified corn plant tissue. The strip tests provide a highly accurate reading of proteins generated by genetic engineering in both the Monsanto and Syngenta varieties of GMO corn.

Samples that tested positive via this testing method were shipped overnight (sealed in bags, frozen, in insulated packaging) to an accredited laboratory, Genetic ID, to confirm the findings using a PCR-based protocol that tests the actual DNA of the corn. These samples tested positive for the regulator genes 35S promoter and NOS terminator, confirming the corn as genetically engineered. Follow-up tests at Genetic ID detected MON89034 in the positive samples, identifying the corn as Monsanto’s Seminis Performance Series™.

Findings (see Table)

corn tested positive for genetically engineered traits. Both were fresh ears of sweet corn on the cob. These were purchased at Stop & Shop (owned by Ahold USA) in Everett, Massachusetts, and City Market (owned by Kroger) in Breckenridge, Colorado.

While we have limited information about the origins of the corn we tested for this report, we were able to determine that the genetically engineered corn purchased at Stop & Shop in Everett was grown in Ontario, Canada, according to the label on the bulk bin at the store.

The genetically engineered corn purchased at City Market in Breckenridge is of unknown origin. The corn was wrapped in plastic packaging and labeled: King Soopers Yellow Corn, three-count, store code 430, bar code 204426001997.

Conclusion

Data from this investigation provide a snapshot look at the U.S. corn market in the summer of 2013. This is not a definitive study or a statistically relevant sampling; however, the relatively large number of samples tested and additional information gathered during this investigation lead us to draw the following conclusions:

1. As of 2013, genetically engineered sweet corn appears to be rare in the U.S. consumer market. Farmers may be deciding not to plant genetically engineered sweet corn, or they may be waiting to see if retailers and food companies accept itvi and whether states decide to label it. It is also possible that genetically engineered corn is being sold in areas of the country or at retailers that were not included in our study. Our largest regional sample – 25 fresh corn samples purchased at grocery stores and farmers’ markets – came from Washington State, a top state for sweet corn production.vii

2. It is not possible to predict where genetically engineered sweet corn will show up on the shelves of U.S. stores. We found genetically engineered sweet corn at Stop & Shop in Everett, Mass. (grown in Ontario, Canada), but less than a mile away at Stop & Shop in Medford, Mass., the corn we tested was not genetically engineered (and grown in western Massachusetts). Corn purchased at Walmart stores in Denver and Seattle was not genetically engineered, even though Walmart has indicated it will carry the corn. It is also worth noting that genetically engineered sweet corn appears to be much more prevalent in Canada. A recent Canadian analysis,viii conducted using a similar strip-testing method as was used in our study, found 15 of 43 samples (35 percent) of corn from four provinces tested positive for genetic engineered traits, including corn sold at roadside stands and farmers’ markets. Considering the data from both studies, it is possible that genetically engineered sweet corn found in U.S. stores is more likely to be coming from Canadian growers. Further investigation is needed to track genetically engineered corn supplies from farm to market in both countries.

3. It is not possible to know if the sweet corn at your local supermarket is genetically engineered without going through a complicated, expensive testing project. Friends of the Earth spent over $2,000 on laboratory analysis, testing kits, shipping and packaging to find two positive samples of genetically engineered sweet corn in the U.S. Obviously it is not possible for the average shopper to conduct such testing. Yet people want to know, and have a right to know, if the sweet corn they are eating has been genetically engineered to contain an insecticide and withstand herbicides. A recent New York Times poll found that 93 percent of Americans want genetically engineered foods to be labeled.ix Labeling is an important and necessary tool for tracking genetically engineered foods in our food supply, especially as DNAaltered foods expand into the fresh produce sections of
our markets.

References

http://libcloud.s3.amazonaws.com/93/27/b/3321/Sweet_Corn_Report_final.pdf

 

[一心无住]

加拿大人怎么回事儿？

 

[reine02]

加拿大人怎么回事儿？

加拿大人有公费医疗？

 

[向问天]

不是说标号数字是几开头的就不是转基因吗？ 这个实验结果跟那个标号数字吻合吗？
咪咪哥呢？ @mimi_ge
9声呢 @冷笑9声

 

[向问天]

市场调查结果表明： 用PCR法检测市场上的新鲜、冷冻、罐装甜玉米，加拿大的调查发现43个样本里有15个是转基因；美国七个州71个样本里只有2个是转基因，其中一个来自加拿大。

一。加拿大

Tests Discover Unlabelled GM Sweet Corn in Canadian Grocery Stores and Farmers’ Markets

(Please note: No samples were tested from Metro stores)

October 23, 2013 Ottawa – Tests have found unlabelled genetically modified (GM) sweet corn in grocery stores, roadside stands and farmers’ markets across Canada, says the Canadian Biotechnology Action Network (CBAN).

“Our testing clearly shows GM sweet corn is present in Canada,” said Lucy Sharratt of CBAN. “The high number of positive results in our small sample size alerts consumers to the fact that they could be unknowingly buying GM sweet corn. At the very least, GM sweet corn should be clearly labelled so consumers can make a choice.”

The purpose of CBAN’s test was to get an indication of the presence of genetically modified (also called genetically engineered) fresh sweet corn in Canada.

“Our sample size was small and random but shows a clear presence of GM sweet corn, across provinces and types of vendors,” said CBAN researcher Taarini Chopra. “The results don’t tell us how much of Canada’s sweet corn is GM, but they do tell us that it’s out there, in both grocery stores and farmers markets.”

CBAN tested 43 samples of conventional fresh, sweet corn. Half were from Ontario; the rest from BC, Alberta and Nova Scotia. The samples were purchased from outlets of major grocery chains (Loblaw, Walmart and Sobeys) as well as some smaller, independent grocery stores, farmers’ markets, and roadside stands.

15 of the 43 samples tested positive. This means that approximately 35% of these sweet corn samples were genetically modified.

GM sweet corn was discovered in samples purchased from Loblaw stores.
GM sweet corn was also present in samples from farmers markets and roadside stands.
Various samples from all 4 provinces where samples were collected - Ontario, BC, Nova Scotia and Alberta - tested positive.
Testing of samples from Sobeys and Walmart did not find GM sweet corn.
Results are not statistically significant but provide a snapshot of GM sweet corn in Canada, in the absence of mandatory GM food labelling and any government tracking, including statistics on GM crop cultivation.
The tests were conducted by CBAN staff, at Seeds of Diversity Canada's laboratory in Waterloo Ontario, using strip tests for the GM protein Cry1Ab.

Until recently, GM corn grown in Canada was predominantly field corn, which is used for animal feed, processed-food ingredients and biofuels. GM sweet corn is the first GM whole food grown in Canada, and raises new questions for consumers about possible health risks.

The sweet corn is genetically engineered with genes from the Bt bacteria to produce proteins that make it toxic to some insects.

“Some farmers might be planting GM sweet corn without knowing that it’s genetically modified, or being aware of the consumer concerns,” said Sharratt.

For more information: Lucy Sharratt, CBAN, 613 241 2267 ext 25; Taarini Chopra, CBAN, cell 226 606 8240. www.cban.ca/corn

http://www.cban.ca/Press/Press-Rele...n-Canadian-Grocery-Stores-and-Farmers-Markets

实验所用的PCR试剂套餐多少钱一份？
买蔬菜水果之前，测试一下可行吗？

 

[nicyr]

看来以后吃美国玉米

 

[reine02]

看来以后吃美国玉米

“Some farmers might be planting GM sweet corn without knowing that it’s genetically modified, or being aware of the consumer concerns,” said Sharratt.

看来加拿大的信息滞后，不太跟的上形势。