Table 5.
Assessment of resistance to late blight of somatic hybrids and 4x mch using detached leaf tests for plants grown from in vitro in 2009–2010 and plants grown from tubers in 2011. Forms with resistance ≥6.0 in 1–9 scale were classified as resistant to P. infestans
| Combination | No. of resistant somatic hybrids/somatic hybrids tested | No. of resistant 4x mch/4x mch tested | ||
|---|---|---|---|---|
| 2009–2010 grown from in vitro plants | 2011 grown from tubers | 2009–2010 grown from in vitro plants | 2011 grown from tubers | |
| mch/8 (+) DG 81-68 | 0/0 | 0/0 | 24/24 | 23/23 |
| mch/8 (+) DG 88-89 | 0/0 | 0/0 | 38/38 | 37/37 |
| mch/8 (+) dH Bard | 0/4 | 0/4 | 11/11 | 11/11 |
| mch/8 (+) cv. Rywal | 0/3 | 0/3 | 23/23 | 20/20 |
| mch/39 (+) DG 81-68 | 0/46 | 1/46 | 9/9 | 9/9 |
| mch/39 (+) DG 88-89 | 1/1 | 0/0 | 6/6 | 5/5 |
| mch/39 (+) dH Bard | 1/52 | 1/49 | 4/4 | 4/4 |
| mch/39 (+) cv. Rywal | 0/12 | 1/12 | 1/1 | 0/0 |
| In total | 2/118 | 3/114 | 116/116 | 109/109 |