Which one of the following methods is commonly used to maintain the genetic of a given plant?

Options

A. By propagating through seed germination
B. By propagating through vegetative multiplication
C. By generating hybirds through intergeneric pollination
D. By treating the seeds with gamma radiations

Answer

To solve the question regarding the method commonly used to maintain the genetics of a given plant, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a method that maintains the genetic traits of a plant. This implies that the method should produce offspring that are genetically identical to the parent plant.

2. **Analyzing the Options**:
- **Option A: Propagation through seed germination**: This method involves sexual reproduction, which includes meiosis and fertilization. During these processes, genetic variation can occur due to segregation and recombination of genes. Therefore, this method does not maintain the genetic identity of the parent plant.

- **Option B: Propagating through vegetative multiplication**: This method involves asexual reproduction, where new plants are produced from parts of the parent plant (like stems, roots, or leaves). Since this process does not involve meiosis or fertilization, the offspring are clones of the parent plant, maintaining the same genetic traits. This is the most reliable method for preserving the genetics of a plant.

- **Option C: Generating hybrids through intergeneric pollination**: This method involves crossing two different plants, which will result in hybrid offspring that possess traits from both parent plants. This method introduces genetic variation and does not maintain the original genetics of a single plant.

- **Option D: Treating the seeds with gamma radiations**: This method is often used for mutation breeding and can induce genetic changes in the seeds. This would not maintain the genetic identity of the parent plant, as it could lead to new traits.

3. **Conclusion**: Based on the analysis, the most suitable method for maintaining the genetic traits of a given plant is **Option B: Propagating through vegetative multiplication**. This method ensures that the offspring are genetically identical to the parent plant.

### Final Answer:
**Option B: Propagating through vegetative multiplication.**