Abstract
Hypersensitive resistance to RKN was observed in infested roots from ex- S. sparsipilum material hybridised with S. tuberosum in F1 and in their BC F2 progeny. This resistance acts against M. incognita, M. javanica and M. arenaria and their isolates virulent against the Mi gene. It does not act against M. mayaguensis. This resistance protects the potatoes from galling on the roots and on the tubers. Like in the case of the Mi gene, this resistance decreases with high temperatures. Results from the F1 segregation confirm the hypothesis of a single dominant gene, here after called Mh. A pre-breeding program was carried out in order to cumulate both heat stable resistance and commercial traits. This program produced 48 genotypes selected for resistance and tolerance to high temperatures which were evaluated in the Souss Sahara in naturally infested conditions. Resistance was confirmed in year 2000 and 15 genotypes selected for agronomic traits in year 2001.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 57-65 |
| Number of pages | 9 |
| Journal | Euphytica |
| Volume | 132 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2003 |
| Externally published | Yes |
Keywords
- Hypersensitivity
- Meloidogyne
- Potato
- Resistance
- Thermolability
ASJC Scopus subject areas
- Agronomy and Crop Science
- Genetics
- Plant Science
- Horticulture