Resistance Performance to Whitebacked Planthopper in Different Phenotypes of Japonica / Indica Doubled Haploid Rice Lines

(整期优先)网络出版时间:2005-02-12
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Fieldperformanceofwhitebackedplanthopper(WBPH)-resistanceoffourphenotypeswasevaluatedinChunjiang06(CJ-06)/TN1DHricelines,whichwereexpressedbydifferentcombinationsofsuckinginhibitoryandovicidaltraitsinheritedindependentlyfromCJ-06.WBPHestablishedthehighestpopulationsinsusceptibleDHlinesthathadneithersuckinginhibitory-norovicidalresistance.Bothimmigrationandsubsequentpopulationlevelswerekeptbelowthedamage-causingdensityinthesuckinginhibitoryDHlinesevenunderaWBPHoutbreak.WBPHcouldnotbuilduppopulationsintheDHlineshavingboththesuckinginhibitoryandovicidalresistance.AlthoughWBPHimmigratedpreferentiallytonon-suckinginhibitoryDHlineswithovicidalresistance,subsequentpopulationbuildupwassignificantlysuppressed.ItwasconcludedthatthedifferentialperformancetoWBPH-resistanceinCJ-06/TN1DHlineswasprimarilyduetothesuckinginhibitorytrait,andcomplementarilytotheovicidaltrait.