Table 2.
Segregation of resistance in F1 and F2 populations from crosses between varieties that were resistant and susceptible to PSV-K and PSV-T
| Cross and parents | PSV isolate | Generation | Total | Number of plants (observed) | Number of plants (expected) | 3 : 1 segregation ratio | |||
|---|---|---|---|---|---|---|---|---|---|
|
|
|
|
|||||||
| Resistant | Susceptible | Resistant | Susceptible | χ2 value | P | ||||
| Enrei (susceptible) × Harosoy (resistant) | PSV-K | F1 | 10 | 10 | 0 | ||||
| F2 | 202 | 152 | 50 | 151.5 | 50.5 | 0.0066 | 0.94 | ||
|
| |||||||||
| PSV-T | F1 | 10 | 10 | 0 | |||||
| F2 | 200 | 151 | 49 | 150 | 50 | 0.0267 | 0.87 | ||
|
| |||||||||
| Enrei (susceptible) × Tsurunotamago 1 (resistant) | PSV-K | F1 | 7 | 7 | 0 | ||||
| F2 | 156 | 122 | 34 | 117 | 39 | 0.85 | 0.36 | ||
|
| |||||||||
| PSV-T | F1 | 7 | 7 | 0 | |||||
| F2 | 153 | 117 | 36 | 114.75 | 38.25 | 0.18 | 0.67 | ||
|
| |||||||||
| Hyuga (resistant) × Enrei (susceptible) | PSV-K | F1 | 13 | 13 | 0 | ||||
| F2 | 134 | 98 | 36 | 100.5 | 33.5 | 0.25 | 0.62 | ||
|
| |||||||||
| PSV-T | F1 | 16 | 16 | 0 | |||||
| F2 | 166 | 125 | 41 | 124.5 | 41.5 | 0.01 | 0.93 | ||