粳型兩系雜交稻農(nóng)藝及品質(zhì)性狀的遺傳分析.pdf

1、華中農(nóng)業(yè)大學(xué)碩士學(xué)位論文粳型兩系雜交稻農(nóng)藝及品質(zhì)性狀的遺傳分析姓名：李雪林申請學(xué)位級別：碩士專業(yè)：作物遺傳育種指導(dǎo)教師：楊書化2002.5.1GeneticAnalysisontheAgronomicandQualityCharactersofTwolinejaponicaHybridRiceABSTRACTInrecentyears，thebreedingoftwolinehybridricehadprogressedtosomeex

2、tentButPGMSlinesandrestorerlinesstillhadalowgeneralcombiningability(GCA)orcrosseshadalowspecificcombiningability(SCA)Atthesarnetimethequalitybreedingofhybridricealsobecameveryimportantfollowingchina’SentryintoWTOSoitwasv

3、erysignificantforbreedingstrongheterosiscrossesandimprovingricequalitytoclarifythegeneticregularityofagronomicandqualitycharactersIntheexperiment，1ldifferenteliteparentsoftWOlinejaponicahybridrice，includingsixPGMSlinesan

4、dfiverestorerlines，werechosentOanalyzethecombingabilityoftenagronomicandfourqualitycharactersandtoestimatetheirgeneticparametersbywayofpXqincompletediallelcrossdesignnleresultsshowedthatbothgeneralcombiningability(GCA)an

5、dspecificcombiningability(sea)weresignificantinall14characters，whichsuggestedthatthesecharacterswerecontrolledbygeneadditiveeffectaswellasnon—additiveeffectTheadditivevariationwasprincipalinplantheight(PH)，spikeletsperpa

6、nicle(SP)，filledspikeletsperpanicle(FSP)，1000‘grainweight(Tow)，paniclelength(PL)，daystoheading(DH)，spikeletdensity(SD)，chalkinessdegree(CD)andamylosecontent(AC)whilethenon—additivevariationWasgreateringrainweightperplant

7、(GWP)andgelconsistency(GL)Inadditon，theadditiveeffectwasthesameimportantasthenon—additiveeffectinseedsettingrate(SSR)，panicleperplant(PP)andheadmiliedricerate(HMRR)In14characters，DHandGWPwereinfluencedmainlybyPGMSline，bu

8、tothercharacterswereinfluencedmoregreatlybyrestorerlinethanbyPGMSlineSoitWaSimportantthattherestorerlineswereimprovedandselectedtocrossThehZNwasorderedfromhightolow船DH，CD，AC，TGW，PL，SD，PH，SPFSPMRR，SS＆PPGCandGWRnlestandard

9、heterosisandovermaleparentheterosiswereanalyzedin30crossesTheresultsshowedthatanapparentnegativestandardheterosisexistedinthecharactersofPPDHandHMRRThermeansofstandardheterosiswere750％350％and240％respectivelyAndtherewasah