不同遺傳體系基因效應對稻米主要品質(zhì)性狀影響的研究.pdf

1、福建農(nóng)林大學碩士學位論文不同遺傳體系基因效應對稻米主要品質(zhì)性狀影響的研究姓名：李亞娟申請學位級別：碩士專業(yè)：作物遺傳育種指導教師：梁康逕2003.5.1DissertationforMaster’sDegreeFujianAgricultureandForestryUniversityInfluenceofGeneEffectsinDifferentGeneticSystemsonMainGrainQualitiesinrice(Ory

2、zasativaL)LiYajuanSupervisedbyProfLiangKangJingABSTRACTAnalysisonseed，cytoplasmicandmaternalgeneticeffectsforsolublesugarcontent(ssc)，totalnitrogencontent(TNC)，ratioofsugartonitrogen(RSN)，brownricelength(BRL)，brownricewi

3、dth(BRW)，brownricethickness(BRT)，ratiooflengthtowidthofbrownrice(RLW)，1000grainweight(GW)andamylosecontent(AC)wasconductedbyusinggeneticmodelsforquantitativetraitsofseedincerealcropsAccordingtocompletediallelcrossdesign，

4、parents，F(xiàn)landF2geneticgenerationsderivedfromsixdifferenttypesofricevarieties(parentallines)，wereusedforthisexperimentThemainresultswereasfollowAnalysisongeneticvarianceshowedthatallthetraitsinvolvedwerecontrolledbygeneso

5、fseed，cytoplasmicandmaternalplantsimultaneouslySSCandGWweremainlyaffectedbydominanteffectsofdiploidmaternalnucleargenes，whileTNCandRSNbydominanteffectsofseednucleargenesBRL，BRWRLWandACweremainlycontrolledbygeneticeffects

6、ofnucleargenesofdiploidmaternalplantofwhichadditiveeffectswereconsideredmaingeneticfactonBRTwasprimarilygovernedbygeneticeffectsofseednucleargenes，ofwhichadditiveeffectsweretakenasmaingeneticfactorTheresultsofheritabilit

7、iesanalysisindicatedthatheritabilitiesforSSC，RSNandGWweresmallordepressive，implyingthatselectionforthemmightbeinvalidMaternalheritabilityinnarrowsensewasthemainheritabilityforBRWandRLWbothofthemcouldbeimprovedbysinglepla

8、ntselection，whiledirectheritabilityforTNCandBRTappearedtobelargerforwhichsingleseeddescentmethodmi曲tbebetteringeneticselectionBothdirectheritabilityandmaternaloneinnarrowsenseforBRLandACtendedtobehigheLshowingbothtraitsc

9、ouldbeimprovedmainlybythemethodofsingle—seeddescenLcomplementedwithsingleplantselectionBasedonheterosisanalysis，itwasindicatedthatSSC，RSN，BRL，BRWandGWinhybridseedsappearedtobeincreasedsignificantlybutTNC，BRTRLWandACinhyb