Name the methods used in plant breeding. Which is the oldest method?

Explanation

### Step-by-Step Solution:

1. **Understanding Plant Breeding**:
- Plant breeding is defined as the purposeful manipulation of plant species to create desired plant types that are better suited for cultivation, with improved yield and disease resistance.

2. **Methods of Plant Breeding**:
- There are several methods used in plant breeding, which can be categorized into two main types:
- **Conventional Plant Breeding**: This method has been practiced for thousands of years and includes techniques such as selection and hybridization.
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