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WHATISGENETICALLYMODIFIEDFOODSGeneticallymodified(GM)foodsarefoodsderivedfromgeneticallymodifiedorganisms.GeneticallymodifiedorganismshavehadspecificchangesintroducedintotheirDNAbygeneticengineeringtechniques.WecandeveloporganismsthatnotnormallyfoundinthespeciesWhyaretransgenicsimportant?Extendedshelf-life(保质期)tomatoHerbicide(除草剂)resistantsoybeanGrowth-enhancedTransgenic(900g)andOrdinary(350g)Catfish(鲶鱼)atthesameageaboutoneyear.Growth-enhancedTransgenic(730g)andOrdinary(15g)Salmon(鲑鱼)atthesameageaboutoneyear.GMvegetablesandCookingoilTransgenicAnimalsADVANTAGESANDDISADVANTAGESManypeoplethinkthatgeneticallymodified(GM)foodbringpeoplebothadvantagesanddisadvantagesADVANTAGES1.Bringalotoffoodstopeople2Reducetheamountoflabor3Reducetheproductioncost,increaseincomeProfessorYuanLongpinghassaidthat,“Peoplearenotmice,wecannotusesomanypeople‘shealthandsafetytodoexperiment,Thefunctionoftransgenicinsect–resistant(抗虫)plantscomefromtoxicproteingene,insectsaredying,butwedonotknowthattoxicproteincoulddoharmtoourbodyornot.”ADVANTAGES1.Bringalotoffoodstopeople2Reducetheamountoflabor3Reducetheproductioncost,increaseincomeDISADVANTAGESGeneticallymodifiedfoodsmaydoharmtothehumanbodyTraditionalfoodshavemorenutritionthanGMfoodGMlivingorganismsgrowtoofastmaydestroythelocalecosystemProfessorYuanalsosaidthat,“Fromascientificpointofview,theGMisthedirectionofscientificdevelopment.Nowwecantransferthemaize(玉米)genetorice,sothatwecanimprovethephotosynthesis(光合作用)ofrice,thiskindoftransgenictechnologyisverygoodwithoutanyproblems”GMFOODSINCHINAGMfoodscontainingfivetypesofrawmaterialsincludesoybean,corn,rapeseed(菜籽油),cotton,tomatomustbelabeledinChina,manypeoplecanacceptGMfoodsChina’stransgeneresearchprogressesPhytase-containingtransgenicmaizeInsect-resistanttransgeniccottonTransgenicriceMYPOINTOFVIEWSciencealwayskeepsdeveloping,soonlywiththerightdirectiononadvancedtechnologycanwegetlotsofdevelopment.Theworldhassomanypepole,needsomuchfoodtoeat,andneeddifferentkindsofmaterials,Wecanusetransgenictechnologytosolvefoodandenvironmentalproblemsalthoughitstillnotimperfect.Thankyou
本文标题:转基因技术英文ppt
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