Aims of plant breeding are to produce

Options

A. disease resistant varieties
B. high yielding varieties
C. early maturing varieties
D. all of these

Answer

### Step-by-Step Solution

1. **Understanding Plant Breeding**:
- Plant breeding is a scientific process aimed at improving the genetic makeup of plants to enhance their desirable traits.

2. **Identifying the Aims of Plant Breeding**:
- The primary aims of plant breeding include:
- **High Yielding Varieties**: Breeding plants that produce a greater quantity of yield (grains, fruits, etc.).
- **Disease Resistant Varieties**: Developing plants that can withstand diseases and pests, reducing the need for chemical pesticides.
- **Early Maturing Varieties**: Creating plants that mature faster, allowing for quicker harvests and potentially more growing cycles in a year.

3. **Analyzing the Options**:
- The question provides four options:
- Disease resistant varieties
- High yielding varieties
- Early maturing varieties
- All of these
- Each of the first three options is a specific aim of plant breeding.

4. **Conclusion**:
- Since all the mentioned characteristics (disease resistance, high yield, and early maturity) are indeed aims of plant breeding, the correct answer is **"All of these."**