Table 1.

Degree of resistance against Rice dwarf virus (RDV) infection in transgenic rice plants induced by different RNAi-targets of RDV genes^a.

Target gene for	Location/putative functionb	GenBank accession	Resistancec
P1	Core particle/RNA polymerase	D90198	Strong
P2	Outer particle/vector transmission	AB263418	Absent
P3	Core particle/major core capsid	X54620	Moderate
Pns4	Cytoplasmic fibril/intracellular movement	X54622	Strong
P5	Core particle/capping enzyme	D90033	Absent
Pns6	Viroplasm/movement protein	M91653	Immune
P7	Core particle/nucleic acid binding	D10218	Absent
P8	Outer particle/major outer capsid	D10219	Immune
P9	Outer particles/unknown	D10220	Absent
Pns10	Tubule structure/silencing suppressor	D10221	Absent
Pns11	Viroplasm/unknown	D10249	Strong
Pns12	Viroplasm/unknown	D90200	Immune

^aTo evaluate any resistance to RDV infection, more than 30 rice plants from three independent lines of transgenic plants were exposed to approximately 10 viruliferous RDV-carrying viruliferous leaf hopper per plant for 1 day.

^bSuzuki etal. (1990a,b, 1991, 1992a,b), Suzuki (1993), Uyeda etal. (1994), Zhong etal. (2003), Li etal. (2004), Cao etal. (2005).

^cImmune, no symptoms developed, and no virus was detected by ELISA in inoculated rice plants through harvest; Strong, weak symptoms developed but were delayed for 2–4 weeks, but growth was almost the same as for mock-inoculated rice plants; Moderate, typical symptoms developed but were delayed 2–4 weeks, and growth was slightly stunted after RDV infection; Absent, typical symptoms developed, as severe as those of RDV-infected non-transgenic rice plants.