Table 2. Infectivity of RYMV isolates with T49 or E49 and RB mutation *52Y after inoculation of rymv1-2 and rymv1-3 rice resistant cultivars.
| RB genotypes | Rice species | |
| O. sativa indica | O. glaberrima | |
| cvs. Gigante/Bekarosaka | cv. Tog5681 | |
| rymv1-2 | rymv1-3 | |
| 2CIa*52Y (T49) | 6/28 (21%)1 | 5/5 (100%) |
| 2Ma105*52Y (T49) | 20/20 (100%) | 5/5 (100%) |
| 2Ma203*52Y (T49) | 20/20 (100%) | 5/5 (100%) |
| 3Mg16*52Y (E49) | 5/5 (100%) | 0/20 (0%) |
| 4CIa*49E*52Y | 9/9 (100%) | 0/35 (0%) |
1
ratio of the number of plants infected over the number inoculated; percentage into brackets.
2
RB genotypes obtained after inoculation of WT isolates to rymv1-3 resistant plants.
3
RB genotype obtained after inoculation of the WT isolates to rymv1-2 resistant plants.
4
RB genotype constructed by directed mutagenesis of the infectious clone CIa.