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1、between0.5～20cM.ThesubstitutionfragmentscovertheN22genome.4.hightemperaturestressof113CSSLsandtwoparentprocessingresultsshowthatthetwodatarepeattesthasthesimilarchangetrend,thermalindexvariationrangeof1.72%~5.55%and1.65%~5.53%,mostofthermalindexofthelinesconcentrationbetween4.61%~5.10%.Atotalofthree
2、substitutionwhichnamedCSSL27,CSSL44andCSSL97,thethermalindexisclosetotheN22,showthedifferencewasnotsignificant;geneticbackgroundofCSSL27,CSSL44andCSSL97recoveryratereached96.3%,97.1%and96.3%respectively.TheeffectiveearNumbersperspike,plantheight,headingstage,andthetotalyieldof5mainagronomictraits(in
3、additiontoCSSL97plantoutput9311slightlylower)andthereisnosignificantdifferencebetween9311orbetterthanthatof9311.Implementthespecificheatresistantgermplasminnovation,intheimprovementofexcellentrestorer9311heatresistanceatthesametime,stillkeepitsoriginalexcellentcomprehensiveproperties.5.Throughtheana
4、lysisofthegeneticeffectofsubstitutionfragments,detectedatotalofsixQTLassociatedwithheatresistance.Distributedin3,4,5,8,9and10chromosome,LODvaluerangeof2.80~2.80,thecontributionrateis5.42~16.06,additiveeffectvalueof1.10~0.75.Locatedin3and10chromosomesegmentsofthesubstitutionofRM157andRM5352contributi
5、onrateisbigger,mayforcontrolofriceseedlingstageofheatresistanceofmaineffectgenes,butneedtobefurtherverified.6.Substitutionfragmentsofinteractioneffectanalysisshowedthattheeffectofinteractionsbetweenmultiplesegmentsofheat-resisting,embodiedinhomologouschromosomesandonthesamechromosome,theinteractions
6、betweenalleles.LODvalueof4.98~4.98,thecontributionrateis1.50%~12.64%,additiveeffectis0.70~0.70,RM5586interactioneffectbetweenRM273hadthebiggestcontributionrate,as12.64%.Indicatesthattheheatresistanceofricemaybecontrolledbysomemaineffectgenes,bothatthesametimebetweendifferentsegmentsofsubstitutionand
7、themaineffectgenesandthereareinteractionsbetweenminorgenefragmenteffect,thesefindingsfurtherillustratesthecomplexityofthegeneticbasisofriceheatresistance.Soitisnecessarytofurtherotherreproductiveperio
