Table 3.
Regional composition of blast reaction clusters (A, B1, and B2) categorized by the phenotype of the blast reaction pattern
| Varietal type | Region | No. of rice accessions in each blast reaction cluster | RF (%)a | |||||
|---|---|---|---|---|---|---|---|---|
| A | B | Total (%) | ||||||
| A (%) | B1 (%) | B2 (%) | Sum (%) | |||||
| Landrace | Amhara | 5 (83.3) | 0 (0.0) | 1 (16.7) | 1 (16.7) | 6 (100.0) | 67.5 | |
| Gambella | 4 (100.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 4 (100.0) | 66.3 | ||
| Benishangulgumize | 14 (93.3) | 0 (0.0) | 1 (6.7) | 1 (6.7) | 15 (100.0) | 74.0 | ||
| South NNPR | 2 (100.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 2 (100.0) | 77.5 | ||
| Sum | 25 (92.6) | 0 (0.0) | 2 (7.4) | 2 (7.4) | 27 (100.0) | 71.3 | ||
| Improved varieties | — | 32 (97.0) | 1 (3.0) | 0 (0.0) | 1 (3.0) | 33 (100.0) | 77.6 | |
| Control | — | 9 (32.1) | 11 (39.3) | 8 (28.6) | 19 (67.9) | 28 (100.0) | 50.0 | |
| Total | 66 (75.0) | 12 (13.6) | 10 (11.4) | 22 (25.0) | 88 (100.0) | 67.0 | ||
| RF (%) | 75.8 | 51.7 | 27.0 | 40.5 | 67.0 | — | ||
a Resistance frequency (RF) = (No. of incompatible isolates / total no. of isolates used) × 100% (Wu et al. 2015).