Which is the oldest method for crop improvement ?
(a) Hybridization
(b) Selection
(c) Mutation breeding
(d) Introduction

Options

A. Hybridization
B. Selection
C. Mutation breeding
D. Introduction

Answer

To determine the oldest method for crop improvement from the given options, we can analyze each method:

1. **Hybridization**: This method involves crossing different varieties of plants to produce hybrids with desirable traits. While effective, hybridization is a relatively modern technique in the context of agricultural practices.

2. **Selection**: This is the process of choosing plants with desirable traits for reproduction. It is based on the observation of traits such as yield, disease resistance, and adaptability to environmental conditions. Selection has been practiced since ancient times when early farmers chose the best plants for cultivation. Therefore, it is considered the oldest method of crop improvement.

3. **Mutation breeding**: This technique involves inducing mutations in plants to create new varieties. It is a more recent development that utilizes radiation or chemicals to induce changes in the genetic material of plants.

4. **Introduction**: This method refers to bringing new species or varieties from other regions into a new area. While it has been practiced for a long time, it is not as ancient as the selection method.

Based on this analysis, the correct answer is:

**(b) Selection**