栽培稻轉(zhuǎn)基因逃逸的風險預測.pdf

1、復旦大學博士后學位論文栽培稻轉(zhuǎn)基因逃逸的風險預測姓名：宋志平申請學位級別：博士后專業(yè)：植物學指導教師：盧寶榮20030601AbstractPollenflowofcultivatedriceOryzasativaLandcommonwildriceDnfipogonGriffundernaturalconditions，theimpactsofintrogressionfromcultivatedriceongeneticvariab

2、ilityanddifferentiationofDrufipogon，andgeneticdiversityofLeersiakexandraSwartzwereinvestigateddetailedly灑thisthesisTheaimistOassess也epossibilityoftransgeneescapeanditspotentialinfluencesonwildrelativesofricenemainresults

3、weBi：summarizedasfollowsPollenflowwasexaminedwithinarangeof80mforcultivatedriceandarangeof70mfornrufipogonTheresultsshowedthattheairbomepollendensitiesofcultivatedriceandnrufipogonbothdeclinedwithincreasingofdistanceThep

4、ollendensityatdistanceof80mofcultivatedriceWa5about98％ofthatatzcrodistanceTheratioofpollendensitybetweenthedistancesof70mand0mWaS182％forDrufipogonThesesuggestedthatthepollenofthetwospeciescoulddispersaltoarelativelylonge

5、rdistance億ver80m)wi出windmediatingTheairbornepollendensityatdistanceofzerometerofcultivatedriceWaSremarkablybiggerthanthatof0rufipogon(13343552793u置16461767grain／cmz)，indicatingthatanasymmetrygeneflowwouldoccLlrbetweenthe

6、twospeciesandgeneflowwouldbemainlyfromcroptowildiftheygrowsympatricallywithanincompleteisolationTheexperimentsofgeneticvariabilityperformedusingSSRmethodsrevealedthatthenorthernmostpopulationsofDrtfipogoninChinastillheld

7、relativelyhighgeneticvariations(He0392)，althoughtheirsizesaredecreasing，andDrufipogonpopulationsfromGuangdongshowedmuchhighergeneticdiversity(He=0609)，TheoutcrossingrateofthestudiedwildpopulationsWasfrom0186toO736，reflec

8、tingDrufipogonmightbepollinatedbyforeignpollengrainsThewildpopulationswellisolatedfromcultivatedricehadrelativelylowergeneticvariabilitythanthatmixed～occurredwithcultivars，suggestingthatintrogressionfromcropswouldchanget