重要農藝性狀基因在水稻重組自交系群體中的定位.pdf

1、華中農業(yè)大學碩士學位論文重要農藝性狀基因在水稻重組自交系群體中的定位姓名：祝莉莉申請學位級別：碩士專業(yè)：農業(yè)推廣種植指導教師：靳德明20080601AbstractRice(OryzasativaL)isoneofthemostimportantfarmcropfoodoftheworldTheyieldofpaddyriceoccupies40％aboveoftheyieldofnationalfarmcrop，40％orsoofth

2、etotalyieldofworldpaddyriceAnalysisofquantitativetraitloci(QTLs)wascarriedoutbasedonthemolecularlinkagemapconstructedfromtheRILpopulmionDifferentQTLswereidentifiedforheadingdate，plantheight，paniclelengthflagleaflength，an

3、dflagleafwidthTheycollectedlyexplained506％、749％、341％、473％and46％ofphenotypicvariationsforthesetraitsOfthemappedQTLs，geneHd26，Ph27andF11b2controllingheadingdate，plantheightandflagleaflengthweremajorlocilocatedonchromosome6

4、，7and2，respectivelyQTLscontrollingtherelatedagronomictraitswereoftenmappedonthesameoradjacentintervals，formingseveralclustersinricechromosomesTheimportantagronomictraitlociwereidentifiedandanalyzedCanprovideusefulgenetic

5、information，whichisusedasmolecularmarkeraidedselectioninbreedingprogramofB5ThetillernumberoftheparentSandRILswereevaluatedevery4daysfromthe15thdayaftertransplantingFourmain—effectQTLscontributingtotillernumberincreasewer

6、edetectedthatexpressedindifferenttimeintervalsTheseQTLswerelocatedonthechromosomes2，5，8and9SeventeenpairsofepistaticlOCiweredetectedtooThedigenicepistasisshowedrelativelyhigheffectinseveraltimeintervals，whichsuggestsamul