The reason why vegetatively reproducing crop plants are best suited for maintaining Hybrid vigour is that:

Options

A. They can be easily propagated
B. Once a desired hybrid, has been produced there are few chances of losing it
C. They have a longer life span
D. They are more resistance to diseases

Answer

**Step-by-Step Solution:**

1. **Understanding Hybrid Vigor**: Hybrid vigor, or heterosis, refers to the phenomenon where hybrid offspring exhibit superior qualities compared to their parents. This can include increased growth rates, higher yields, and improved resistance to diseases.

2. **Definition of Vegetative Reproduction**: Vegetative reproduction is a form of asexual reproduction where new plants are produced from the vegetative parts of the parent plant, such as stems, roots, or leaves. This method allows for the cloning of the parent plant.

3. **Advantages of Vegetative Reproduction for Hybrids**:
- **Clonal Propagation**: Vegetatively reproducing plants can be easily propagated, meaning that the desirable traits of the hybrid can be consistently reproduced without the genetic variation that occurs in sexual reproduction.
- **Stability of Desired Traits**: Once a hybrid with desirable traits is developed, vegetative reproduction ensures that these traits are maintained in subsequent generations. This minimizes the risk of losing the hybrid vigor that was achieved.
- **Longer Lifespan**: Vegetatively propagated plants often have a longer lifespan, allowing them to produce more yields over time compared to sexually reproduced plants, which may not maintain vigor in subsequent generations.
- **Disease Resistance**: Many hybrids developed through selective breeding are more resistant to diseases. Vegetative reproduction helps in maintaining this resistance in the clones produced.

4. **Conclusion**: Therefore, vegetatively reproducing crop plants are best suited for maintaining hybrid vigor because they allow for easy propagation of the desired traits, ensuring stability and longevity of the hybrid characteristics.