Genetically engineered corn. These traditional crop varieties contain transgenic DNA. Scientists have discovered DNA from genetically engineered crops in various wild crops that grow on Mexican farms. Although there is currently no evidence that genetically modified DNA is harmful to humans or undermines the genetic diversity of crops, experts were surprised by the discovery that they believe that preventing the spread of genetically modified DNA beyond their original crop The challenges in the wild species are even more pronounced. "This is an extremely important study," said Norman Ellstrand of the University of California Riverside, "This really changed our view of (containing) genetic material, and people can only assume that it has become more and more global. The harder it is.” The work of David Quist and Ignacio Chapela, microbial ecologists at the University of California, Berkeley, to some extent explored the exchange of genes between processed crops and their wild type. Researchers have detected genetically modified DNA in whole natural crops cultivated by traditional farmers in Oaxaca, Mexico. Quist said, “To our surprise, we discovered that cross-contamination is frequent and diverse.” As they were in 11 As reported in Nature's issue on the 29th, the foreign DNA contains promoters from cauliflower mosaic virus and other components that are often used to construct transgenic crops. The team also detected the bacterial cry1Ab gene, which produces the so-called BT toxin that helps the crop fight against caterpillars. Similarly, unpublished research findings discovered by scientists from the National Institute of Ecology in Mexico and the National Institute of Biodiversity have concluded that more than 10% of wheat fields contain genetically modified DNA. Where do these DNA come from? Although the GM crop was already planted in Mexico before being banned in 1998, the guinea pig was located 100 kilometers from its nearest crop. However, the current GM crops are still imported from the United States for human and animal food. Quist suspects that local farmers may have planted imported crops out of curiosity or use them for crosses to increase the yield of their own breeds. The potential impact on these introduced DNA is not yet clear. "Ecological research can't be done yet," Quist said, but he feared that genetic diversity would be potentially lost as a result. Only other scientists are not very scared. Allison Snow at Ohio State University in Columbus said: "I think that the extra transgenes will not have much impact on the genetic diversity of these plants."

Quaternary Phosphonium Salt

Benzyltriphenylphosphonium Bromide,Quaternary Phosphonium Salt ,Lithium Bromide

Qidi Chemical Co., Ltd. , http://www.czchemicals.com