Which of the following type of culture is used in some interspecific crosses, where endosperm of developing hybrid seed degenerates very early ?

Options

A. Meristem culture
B. Shoot tip culture
C. Embryo culture
D. Anther culture

Answer

To solve the question regarding the type of culture used in interspecific crosses where the endosperm of the developing hybrid seed degenerates very early, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks about a specific type of culture used in interspecific crosses, particularly when the endosperm of the developing hybrid seed degenerates early.

2. **Identify the Options**: The options provided are:
- Meristem culture
- Shoot tip culture
- Embryo culture
- Anther culture

3. **Analyze Each Option**:
- **Meristem Culture**: This technique involves culturing the meristematic tissue of plants. It is primarily used for the propagation of disease-free plants and does not specifically address the issue of hybrid seed degeneration.
- **Shoot Tip Culture**: Similar to meristem culture, this technique focuses on the shoot tips of plants for propagation. It is not directly related to the survival of hybrid seeds.
- **Embryo Culture**: This technique is specifically designed to nurture immature embryos that may not survive on their own, especially in cases of interspecific and intergeneric crosses. It allows for the development of embryos that would otherwise abort.
- **Anther Culture**: This method is used for producing haploid plants from the pollen grains of anthers. It does not relate to the issue of hybrid seed degeneration.

4. **Determine the Correct Answer**: Based on the analysis, **embryo culture** is the most appropriate choice as it is used to support the development of hybrid embryos that may not survive due to early degeneration of the endosperm.

5. **Final Answer**: The correct option is **Embryo Culture**.