稻剑叶和倒二叶形态性状的杂种优势(6)

2021-09-24 20:14

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478

武汉大学学报(理学版)

sectionof

theGeneticRelationshipsof

Source,Sink

Rice

YieldTraitsin105:248-257.

第54卷

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Genet,2002,

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andTransportTissuewith

YieldTraitsin

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Components[J].Genetics,2001,158:1755—1771.

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


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