Apomictic embryo of viable and diploid nature is developed by

Options

A. Apogamy
B. Non-recurrent agamospermy
C. Adventive embryony
D. Trophomixis

Answer

To answer the question regarding the development of an apomictic embryo of viable and diploid nature, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Apomixis**:
- Apomixis is a form of asexual reproduction that occurs in flowering plants, where seeds are produced without fertilization. This leads to the formation of embryos that are genetically identical to the parent plant.

2. **Identifying the Type of Apomixis**:
- Among the various types of apomixis, we focus on "adventive embryony," which is also referred to as apomyxis. This process involves the development of an embryo from tissues other than the egg cell, specifically from the integuments or the nucellus.

3. **Characteristics of Adventive Embryony**:
- The embryos formed through adventive embryony are diploid and viable. This means they have two sets of chromosomes and are capable of developing into a mature plant.

4. **Differentiating from Other Options**:
- **Apogamy**: This refers to the development of an embryo without fertilization, typically resulting in haploid cells, which is not applicable here.
- **Non-recurrent Agamospermy**: This involves the direct development of the embryo sac from the egg cell without fertilization, leading to haploid embryos.
- **Trophomixis**: This is related to double fertilization, where the fusion of polar nuclei and sperm nucleus occurs, primarily resulting in endosperm formation, not embryos.

5. **Conclusion**:
- Based on the definitions and characteristics discussed, the correct answer to the question is "adventive embryonic," which is synonymous with apomyxis.

### Final Answer:
The apomictic embryo of viable and diploid nature is developed by **adventive embryonic** (apomyxis).

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