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揭转基因十大谣言:美国人不吃转基因卖给中国人?

2017-08-02 13:15:19   央视

现代科学没有发现一例通过食物传递遗传物质整合进入人体遗传物质的现象,食用转基因食品影响子孙后代之说完全属于危言耸听。

人类食用植物源和动物源的食品已有上万年的历史,这些天然食品中同样含有各种基因,从生物学角度看,转基因食品的外源基因与普通食品中所含的基因一样,都被人体消化吸收,食用转基因食品是不可能改变人的遗传特性的。事实上,任何一种人们常吃的即使是最传统的动植物食品,都包含了成千上万种基因,不可能也没有必要担心食物中来自于动物、植物、微生物的基因会改变人的基因并遗传给后代。

谣言六:目前市场上销售的圣女果、紫薯、彩椒等都是转基因品种

目前我国市场上销售的圣女果、紫薯、彩椒等都不是转基因品种。

植物是大自然赋予人类的宝贵财富,人类在长期的农耕实践中对野生植物进行栽培和驯化,从而形成了丰富的作物类型。我国市场上所有的圣女果、紫薯、彩椒等都是自然演变和人工选择产生的品种。

转基因产品可以分为两类:一类是我国自己种植和生产的转基因抗虫棉和转基因抗病毒番木瓜;另外一类是从国外进口的转基因大豆、转基因玉米、转基因油菜、转基因甜菜和转基因棉花,主要用作加工原料。

谣言七:转基因食品会致癌,导致不孕不育

通过科学评价批准上市的转基因产品是安全的。

为保障转基因产品安全,国际食品法典委员会、联合国粮农组织、世界卫生组织等制定了一系列转基因生物安全评价标准,成为全球公认的评价准则。依照这些评价准则,各国制定了相应的评价规范和标准。从科学研究上讲,众多国际专业机构对转基因产品的安全性已有权威结论,通过批准上市的转基因产品是安全的。从生产和消费实践看,20年转基因作物商业化累计种植300多亿亩,至今未发现被证实的转基因食品安全事件。因此,经过科学家安全评价、政府严格审批的转基因产品是安全的。

谣言八:抗虫转基因作物虫子吃了会死,对人体同样有害

实际上,抗虫转基因作物对人无害。

抗虫转基因作物中的Bt蛋白是一种高度专一的杀虫蛋白,只能与棉铃虫等鳞翅目害虫肠道上皮细胞的特异性受体结合,引起肠穿孔,导致害虫死亡,而其他昆虫、哺乳动物和人类肠道细胞没有Bt蛋白的结合位点,因此不会对其他昆虫和哺乳动物造成伤害,更不会影响到人类健康。

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