An agricultural scientist wants to use selective breeding to produce a variety of tomato plant that is drought-resistant, high-yielding, and produces sweet-tasting fruit.
The table below shows the characteristics of three different varieties of tomato plant.
| Characteristic | Variety P | Variety Q | Variety R |
|---|---|---|---|
| Drought resistance | Drought-resistant | Requires high watering | Requires high watering |
| Fruit yield | Low-yielding | High-yielding | High-yielding |
| Fruit flavour | Sour | Sweet-tasting | Sour |
Explain which two varieties of tomato plant the scientist should breed together.