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ronmentalInteractionsoftheGeneticBasisof
HeterosisofFlagandSecondLeafShapeTraitsinRice
LILanzhil,LUKaiyan92,MOUTongmin2,HUZhonglil
(1.CollegeofLifeSciences,WuhanUniversity/KeyLaboratoryofMinistryofEducation
forPlantDevelopmental
Biology,Wuhan430072,Hubei,China;
2.NationalKeyLaboratoryofCropGeneticImprovement,HuazhongAgriculturalUniversity,Wuhan
430070,Hubei,China)
Abstract:Inpresentstudy,QTLanalysiswasconductedforsixshapetraitsofflagandsecondleafin
Zhenshan97/Minghui63RILandtwobackcrosspopulations.Heterosisofthesetraits
tal,39QTLweredetected,distributed
on
wasdiscussed.Into-
10chromosomesexceptchromosome3andchromosome5.Var—
iationexplainedbymostindividualQTLwaslessthan10
0A.It
shouldbenotedthat,QTLQSlwllc
ac—
countedfor45.4%ofthevariation.Resultsindicatedthat,overdominanceisthepredominantfactoraf—
feetingtheheterosisofriceleafshape.Meanwhile,thegeneticeffectoflociconditioningheterosisofleaf
area
isfarmorethanthoseofleaflengthandwidth.Thissuggestedthat,itwouldbeeffectivetoenhance
area
photosynthesisyield.
byusingtheselociinfluencingriceleaf
area
heterosis
80as
to
improvericebiomassand
Keywords:rice(OryzaSativaL.);flagleaf;secondleaf;quantitativetraitloci(QTL);heterosis