盐胁迫对小麦代换系幼苗的影响与染色体效应分析

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1、万方数据6D、CS、Synthetic6x耐盐性较弱。关键词：小麦代换系：盐胁迫；染色体效应；生理指标；幼苗万方数据PhysiologicalandChromosomalEffectsofSaltStressonChromosomeSubstitutionofWheatSeedlingsAuthor：JingJiao-jiaoMajor．BotanySupervisor：ProfessorBaiZhi·)ringAbstractSoilsalinizationisoneofthemostimportantfactsinfluencinggloba

2、lagricultureandcropproduction．Asweknowwheatisanimportantcropintheworld，whichismoderatelysalt-tolerantandtheyieldofwheatispositivelysignificantcorrelatedwiththesaltcontent．Inordertofulfilltheneedofworld’Sgrowingpopulationforfood，itbecomestheresearchfocusofdomesticandforeignexp

3、ertstostudytheeffectofwheatsalttoleranceandtobreedhigh-resistedspecies．Thewheatsubstitutionlinesarethepreciousgermplasmresourcesofgeneticresearch．ChinaSpring(cs)-Synthetic6xchromosomesubstitutionlinesaregeneratedbythe21chromosomeofdonorvarietiesSynthetic6xintotherecipientvari

4、etyChineseSpring．TherearegreatgeneticdifferencesbetweenmaleSynthetic6x，andfemaleChineseSpringbecauseofmaleSynthetic6xcontainingwealthyresistancegeneandrichgeneticdiversity．Inordertostudytheeffectandchromosomalcontrolofsaltstressinwheatseedlings，wheatsubstitutionlinesbetweenCh

5、ineseSpringandSynthetic6xwereculturedinHoagland’Ssolution．Twotreatmentsincludingcontrolgroup(0mmolL叫NaCl)andsalttreatmentgroup(150mmol’L叫NaCI)werecarriedoutattwo-leafstageofseeding．．Physiologicalandbiochemicalindexesweremeasuredundercontrolledconditionandsalttreatmentofseedli

6、ngsatfour-leafstage．Itwouldprovideatheoreticalbasisforthebreedingandgeneticimprovementofsalt-tolerantgenotypes．Theresultswereasfollowing：1．Theresultsshowedthatsaltstessresultinaccumulationofsolubleproteincontentandsolublesugarcontent，prolinecontent，Na+，K十content，SOD，PODactivi

7、tiesandreductionofspecificleafweigh，chlorophyllcontent，carotenoidcontent，Photosyntheticrate，transpirationrate，MDAcontent．Thegenesincreasimgsolubleproteincontentmightbeexiston1A，2A，4A，6Achromosomesandthegenespromotingsolublesugarcontentmightbelocatedon6A，7A，7Dchromosomeaswella

8、sthegenespromotingprolinecontentmightbelocatedon7A，6DchromosomeofSyn