Table 3.

Strength of RNAi by feeding versus injection

	Feeding		Injection
Test gene	n	% Phe	n	% Phe
gpb-1	506	100	175	100
par-1	262	100	293	100
par-2	257	100	288	100
par-3	241	97	540	100
par-6	361	100	348	100
cyk-1	308	55	275	100
skn-1	355	100	311	100
dnc-1	343	100	309	100
bir-1	391	100	403	100
pal-1	393	100	396	100
dif-1	391	100	244	100
plk-1	402	100	239	100
dhc-1	269	100	173	100
mex-3	200	100	256	100

Fourteen known maternal-effect embryonic lethal genes were tested to determine the efficiency of RNAi by feeding relative to injection for producing embryonic lethality. Data shown represent the progeny of three fed worms. n, number of embryos scored; %Phe, percentage of embryos with embryonic lethality.