Researchers have relied on the technique to trace a dead warbler found in the lettuce of a Canadian salad bar back to California. Other scientists have used the strategy to identify China as the true origin for a headless mouse unexpectedly starring in a TV dinner and a deadly pufferfish posing as benign monkfish.
DNA barcoding can readily point out birds or mice or fish that don’t belong, just like a Universal Product Code can determine where a sack of flour should or shouldn’t go in a supermarket. But the real power of the fast-growing science, according to its supporters, is in describing and cataloguing the 98 percent or so of biological life on Earth that has yet to be named.
“Two hundred and fifty years after we began the organization of life, we can’t identify the organisms around us,” said Paul Hebert, an evolutionary biologist at the University of Guelph in Canada. If we are to overcome our biological illiteracy before extinction permanently removes our neighbors, he told attendees at last month’s European Science Open Forum in Barcelona, “we need to look for a technology assist, and it is based on DNA barcoding, reading the stream of information underpinning organisms.” ..cont'd
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