Which of the following is the conventional method of plant breeding for disease resistance ?

Options

A. polyploidy
B. genetic engineering
C. hybridisation
D. mutation breeding

Answer

To determine the conventional method of plant breeding for disease resistance, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Plant Breeding Methods**:
Plant breeding can be categorized into two main methods: conventional breeding and modern techniques (like genetic engineering).

2. **Define Conventional Breeding**:
Conventional breeding, also known as traditional breeding, involves the natural crossing of plants to combine desirable traits.

3. **Identify the Process**:
In conventional breeding for disease resistance, a crop is crossed with a wild variety that possesses genes for disease resistance.

4. **Hybridization**:
The process of crossing the crop with the wild variety is known as hybridization. This method increases the chances of transferring disease-resistant genes to the progeny.

5. **Conclusion**:
The conventional method of plant breeding for disease resistance is hybridization, where the goal is to enhance the progeny with disease-resistant traits from the wild variety.

### Final Answer:
The conventional method of plant breeding for disease resistance is **hybridization**.

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