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

摘要

Field performance of whitebacked planthopper (WBPH)-resistance of four phenotypes was evaluated in Chunjiang 06(CJ-06) / TN1 DH rice lines, which were expressed by differentcombinations of sucking inhibitory and ovicidal traits inheritedindependently from C J-06. WBPH established the highest populations in susceptible DH lines that had neither sucking inhibitory- norovicidal resistance. Both immigration and subsequent population levels were kept below the damage-causing density in the suckinginhibitory DH lines even under a WBPH outbreak. WBPH could not build up populations in the DH lines having both the suckinginhibitory and ovicidal resistance. Although WBPH immigrated preferentially to non-sucking inhibitory DH lines with ovicidalresistance, subsequent population buildup was significantly suppressed. It was concluded that the differential performance toWBPH-resistance in CJ-06 / TN1 DH lines was primarily due to the sucking inhibitory trait, and complementarily to the ovicidal trait.