In situ hybridization analysis. NIL plants carrying BPH26 in a Taichung 65
background at the 5- to 6-leaf stages were used for in situ hybridization analysis of
BPH26 m-RNA. NIL plants that did not experience sucking from BPH were used for
this analysis. In situ hybridization was conducted according to the methods described
previously57. The BPH26 antisense probe was synthesized by in vitro transcription by
using SP6 RNA polymerase from a 250-bp fragment that was a part of the BPH26-
specific 39UTR sequences amplified using PCR (Supplementary Table S2 online).