Seeds of F2 progeny of a cross between a slow-germinating (UCT5) and a fast-germinating tomato line (PI120256) were evaluated for germination under non-stress (control), cold-stress and salt-stress conditions, and in each treatment the most rapidly (first 5%) germinating seeds were selected, grown to maturity and self-pollinated to produce F3 progeny. The selected F3 progeny from each experiment were evaluated for germination in each of the three treatments, and compared with germination rate of unselected F3 progeny. Selection for rapid seed germination was effective under cold stress and salt stress, but not effective under non-stress conditions. Furthermore, selection in either cold-stress or salt-stress treatment significantly improved progeny germination rate under both cold-stress and salt-stress treatments, as well as the non-stress treatment. The results support the suggestion that the same genes contribute to rapid seed germination under cold-, salt-and non-stress conditions. In practice therefore, selection for rapid seed germination under a single-stress environment may result in progeny with improved seed germination under a wide range of environmental conditions. Furthermore, to improve germination rate under non-stress conditions, it may be more effective to make selections under a stress treatment.
|Original language||English (US)|
|Number of pages||4|
|State||Published - Mar 1 1999|
All Science Journal Classification (ASJC) codes
- Agronomy and Crop Science
- Plant Science