Which one of the following is not a benefit of haploid culture ?

Options

A. Small mutations are easily identified by haploid culture
B. Homologous diploids can be produced by chromosome doubling
C. Production of pure lines reduce the breeding cycle for developing new varieties
D. Production of somatic hybrids.

Answer

To solve the question "Which one of the following is not a benefit of haploid culture?", we will analyze each option provided and determine whether it represents a benefit or a disadvantage of haploid culture.

### Step-by-Step Solution:

1. **Understand Haploid Culture**:
- Haploid culture is a technique used in plant breeding and genetics where haploid cells (cells with a single set of chromosomes) are produced in vitro (in a lab setting). This technique is beneficial for various reasons, including the identification of mutations and the production of pure lines.

2. **Evaluate Option A**:
- **Statement**: "Sporm mutations are easily identified by haploid culture."
- **Analysis**: This is a benefit because haploid culture allows for the easy identification of mutations, which is advantageous for genetic studies and breeding programs.

3. **Evaluate Option B**:
- **Statement**: "Homologous diploids can be produced by chromosomal doubling."
- **Analysis**: This is also a benefit. The ability to produce homologous diploids through chromosomal doubling is advantageous as it allows for the generation of stable genetic lines.

4. **Evaluate Option C**:
- **Statement**: "Production of pure lines reduces the breeding cycle for developing new varieties."
- **Analysis**: This is a benefit as well. Producing pure lines through haploid culture can indeed shorten the breeding cycle, making it easier to develop new plant varieties.

5. **Evaluate Option D**:
- **Statement**: "Production of somatic hybrids."
- **Analysis**: This is not a benefit. Somatic hybrids are formed from somatic cells, and the changes they undergo do not get passed on to subsequent generations. Therefore, this represents a disadvantage of haploid culture.

### Conclusion:
The correct answer to the question "Which one of the following is not a benefit of haploid culture?" is **Option D: Production of somatic hybrids**.

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