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发表于 2005-4-21 17:48:11
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第一点：在我知道的转基因技术用于农作物中，主要是抗虫，而不是增加粮食产量，所以我提出不能有效增加粮食产量，至于你的那个百分比，是多年实际结果，还是一年结果，我不知道。因为有时候天公的脸色，给个20％的出入还是有可能的。所以你说的这个常识，我可还真不知道，只知道这个转基因农作物的支持者喊出来的
Can genetic engineering produce crops that increase food production?
The most important argument for convincing the public and decision-makers about the value of genetic engineering of food has been the claim that it will produce new, valuable crops that may contribute importantly to the solution of the world hunger. Does this have scientific support?
There is not any one single gene known to be responsible for such productivity enhancing properties as high yield, increased nitrogen fixation, increased hardiness, etc. Such valuable properties are commonly the consequence of combinations of many different genes interacting with each other and the environment. All properties of a plant are dependent on complex interactions within and outside the organism (see The new understanding of genes). For this reason, the effects of a foreign inserted gene is unpredictable and combined insertions are manifold more unpredictable.
In addition, the artificial insertion of foreign genes disrupts the ordinary sequnece of the genetic code words that is believed to be important for normal functioning (see What is genetic engineering? and Genetic engineering possesses inherent unpredictability ). This adds further to the unpredictability of gene insertions.
Because there are natural protection mechanisms against uptake of foreign genes (constituting the socalled species barrier), even plants with single inserted genes tend to be genetically unstable. This instability is most probably increased considerably with the insertion of several genes.
For these reasons it seems, with presently available technology, unrealistic to develop valuable and genetically stable new crops through the insertion of several different genes. It remains to be proven that this will be possible in the future.
To believe that it is possible to produce fertile, healthy, stable and valuable plants by inserting many different \"desirable\" genes appears thus to be wishful thinking with no support in present scientific knowledge.
2、我认为第一点才是饥饿的根本原因，至于粮食产量是否可以解决饥饿，看印度的那个例子
3、绿色流域一个组织做当然慢，全球这么多农业专家一起参与，还会慢不？解决当地的经济问题才能解决饥饿问题的 |
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