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[report整理] SENEWS-2011-03-01

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[Homework]SENEWS-2011-03-01

本帖最后由 googo66 于 2011-3-1 11:00 编辑

This is the VOA Special English Agriculture Report.
White rice is the world's most popular rice, but it goes through a million process that remove many nutrients. As a result, people who eat a poor diet based on white rice might get enough vitamin A.
Each year an estimated 250,000 to half a million children go blind from vitamin A deficiency.The WHO says half of them die within a year of losing their sight.Vitamin A deficiency is a problem, especially in Africa and South Asian.So scientists found the answer. They combine white rice with plants compounds that body can change into vitamin A. The rice contain beta-carotene and other carotenoids. These plant colorings give the rice a golden color.
The scientist also found a plan to give away the golden rice for free to poor farmers. The rice is genetically engineered. They say they can not be made using traditional method to breed plants. The scientists worked for ten years until 1990 to develop the technology to add genes to rice that took nine more years to get the genes they wanted into the seed.
The first field test took place in 2004 at Lusitania University in the US. Golden rice is currently tested in Philippines. It is still not available for general use.
Co-inventor Ingo Potrykus says rice with two added genes will be available in 2013. One gene comes from maize or corn and the other from a soil bacterium.
Mr Potrykus says retired from Swiss Federal Institute of Technology. He blames the delays on too many rules about genetically modified crops. Opponents says such crops may cause environmental damage by breeding with conventional plants. Opponents also question the safety of bio-tech foods. Mr Potrykus says golden rice has never been shown to be unsafe for the environment or people. Many agriculture organizations support the project. But also there are critics including researchers for the environmental group Green Peace. Several months ago they questioned whether golden rice could do much for vitamin A deficiency. They said releasing genetically modified rice in Asia could permanently change traditional rice for variety and wild ancestors of rice.

And that's the VOA Special English Agriculture Report, written by Jeroline Watson. For more news about rice research, go to voaspecialenglish.com. I'm Bob Doughty.
                                                   
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