Identification of Rice Accessions Associated with K+/Na+ Ratio and Salt Tolerance Based on Physiological and Molecular Responses-中国Betway体育网页登陆

摘要 ThekeyforriceplantsurvivalunderNaClsaltstressismaintainingahighK+/Na+ratioinitscells.Selectionforsalttolerancericegenotypesbasedonphenotypicperformancealonewilldelayinprogressinbreeding.Useofmolecularmarkersintandemwithphysiologicalstudieswillhelpinbetteridentificationofsalttolerantriceaccessions.EightriceaccessionsalongwiththecheckDongjinwerescreenedusing1/2Yoshidasolutionwith50mmol/LNaClattheseedlingstage.TheaccessionsIT001158,IT246674,IT260533andIT291341wereclassifiedassalttolerantbasedontheirK+/Na+ratios.SeventeenSSRmarkersreportedtobeassociatedwithK+/Na+ratiowereusedtoscreentheaccessions.FiveSSRmarkers(RM8053,RM345,RM318,RM253andRM7075)coulddifferentiateaccessionsclassifiedbasedontheirK+/Na+ratios.BandingpatternoftheaccessionswasscoredcomparedtothebandingpatternofDongjin.ThestudydifferentiatedaccessionsbasedontheirassociationofK+/Na+ratiowithmolecularmarkerswhichareveryreliable.Thesemarkerscanplayasignificantroleinscreeninglargesetofricegermplasmsforsalttoleranceandalsohelpinidentificationofhigh-yieldingvarietieswithbettersalttolerance.Thesalttolerantaccessionscanbetakenforwardintodevelopingbettervarietiesbyconventionalbreedingandexploringgenesforsalttolerance.

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Identification of Rice Accessions Associated with K+/Na+ Ratio and Salt Tolerance Based on Physiological and Molecular Responses

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