TABLE 7.
Reversion of sweetpotato cultivars in environments with different mean daytime temperatures
| Season A |
Season B |
|||||
|---|---|---|---|---|---|---|
| MUARIK (average temp. 22°C) |
MUARIK (average temp. 21°C) |
|||||
| Period after planting (weeks) |
Period after planting (weeks) |
|||||
| Cultivar | 2 | 7 | 12 | 2 | 7 | 12 |
| Resisto | 0 | 20 | 13 | 7 | 11 | 13 |
| NASPOT 1 | 99 | 87 | 89 | 56 | 51 | 73 |
| New Kawogo | a | a | 80 | 87 | 89 | 89 |
|
Kabale (average temp. 18°C) |
Kabale (average temp. 19.5°C) |
|||||
|
Period after planting (weeks) |
Period after planting (weeks) |
|||||
| Cultivar | 2 | 7 | 12 | 2 | 7 | 12 |
| Resisto | 0 | 0 | 0 | 0 | 4 | 4 |
| NASPOT 1 | 42 | 42 | 60 | 29 | 38 | 80 |
| New Kawogo | 11 | 16 | 78 | 58 | 60 | 80 |
Note: Percentage reversion from Sweet potato feathery mottle virus (SPFMV) of graft-infected sweetpotato cultivars (n = 45 plants per treatment) when grown under different temperature regimes for two seasons. Mean daytime temperature for each experiment is given. The presence of SPFMV was tested at 2, 7 and 12 weeks after planting by grafting shoot tips to Ipomoea setosa.
a
Leaves grazed but the plants regenerated later.