转基因技术英文ppt

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.GMvegetablesandCookingoilTransgenicAnimalsADVANTAGESANDDISADVANTAGESManypeoplethinkthatgeneticallymodified(GM)foodbringpeoplebothadvantagesanddisadvantagesADVANTAGES1.Bringalotoffoodstopeople2Reducetheamountoflabor3Reducetheproductioncost,increaseincomeProfessorYuanLongpinghassaidthat，“Peoplearenotmice,wecannotusesomanypeople‘shealthandsafetytodoexperiment,Thefunctionoftransgenicinsect–resistant(抗虫)plantscomefromtoxicproteingene,insectsaredying,butwedonotknowthattoxicproteincoulddoharmtoourbodyornot.”ADVANTAGES1.Bringalotoffoodstopeople2Reducetheamountoflabor3Reducetheproductioncost,increaseincomeDISADVANTAGESGeneticallymodifiedfoodsmaydoharmtothehumanbodyTraditionalfoodshavemorenutritionthanGMfoodGMlivingorganismsgrowtoofastmaydestroythelocalecosystemProfessorYuanalsosaidthat,“Fromascientificpointofview,theGMisthedirectionofscientificdevelopment.Nowwecantransferthemaize(玉米)genetorice，sothatwecanimprovethephotosynthesis（光合作用）ofrice,thiskindoftransgenictechnologyisverygoodwithoutanyproblems”GMFOODSINCHINAGMfoodscontainingfivetypesofrawmaterialsincludesoybean,corn,rapeseed（菜籽油）,cotton,tomatomustbelabeledinChina,manypeoplecanacceptGMfoodsChina’stransgeneresearchprogressesPhytase-containingtransgenicmaizeInsect-resistanttransgeniccottonTransgenicriceMYPOINTOFVIEWSciencealwayskeepsdeveloping,soonlywiththerightdirectiononadvancedtechnologycanwegetlotsofdevelopment.Theworldhassomanypepole,needsomuchfoodtoeat,andneeddifferentkindsofmaterials,Wecanusetransgenictechnologytosolvefoodandenvironmentalproblemsalthoughitstillnotimperfect.Thankyou