Crynodeb
Festuca pratensis was used as a source of genes for drought resistance and freezing tolerance for transfer
in introgression breeding programmes to high quality Lolium multiflorum cultivars. Triploid (2n = 3x = 21) hybrids
– L. multiflorum (4x) × F. pratensis (2x) were backcrossed twice to diploid (2n = 2x = 14) cultivars of L. multiflorum.
BC2 plants were pre-selected in natural field conditions and screened by GISH. Nine diploid introgression lines
of L. multiflorum each with a single F. pratensis chromosome segment were tested for freezing tolerance. Three
freezing tolerant BC2 plants, each with a single Festuca chromosome segment at a different location, were used in a
further backcross to produce the BC3 generation. One hundred and thirty plants from two of the BC3 populations
were tested for freezing tolerance, and 30 plants of another population for drought resistance. Among the more
stress resistant genotypes, plants with a single Festuca introgression and also other plants with no introgression
detectable by this technique were found. The preliminary results of introgression mapping for drought resistance
and freezing tolerance in BC2/BC3 populations are presented.
| Iaith wreiddiol | Saesneg |
|---|---|
| Tudalennau | 342-344 |
| Nifer y tudalennau | 3 |
| Statws | Cyhoeddwyd - 2003 |
| Digwyddiad | Proceedings of the 25th EUCARPIA Fodder Crops and Amenity Grasses Section Meeting 1-4 September 2003. - Brno, Y Weriniaeth Tsiec Hyd: 01 Medi 2003 → 04 Medi 2003 |
Cynhadledd
| Cynhadledd | Proceedings of the 25th EUCARPIA Fodder Crops and Amenity Grasses Section Meeting 1-4 September 2003. |
|---|---|
| Gwlad/Tiriogaeth | Y Weriniaeth Tsiec |
| Dinas | Brno |
| Cyfnod | 01 Medi 2003 → 04 Medi 2003 |