In pedigree method of hybridisation upto which generation the plants tested and released for cultivation

Options

A. (a) `F_(2)` generation
B. (b) `F_(3)` generation
C. (c) `F_(4)` generation
D. (d) `F_(6)` generation

Answer

**Step-by-Step Solution:**

1. **Understanding the Pedigree Method of Hybridization:**
- The pedigree method is a systematic approach to plant breeding where plants are grown over several generations. This method allows breeders to analyze and trace the inheritance of traits in hybrid plants.

2. **Identifying Generations:**
- In the context of plant breeding, generations are denoted as F1, F2, F3, etc.
- F1 refers to the first filial generation (the first offspring from the parental generation), F2 is the second generation (offspring of F1), and so on.

3. **Analyzing Traits:**
- The pedigree method helps in studying various traits, including dominant and recessive traits, across these generations. This analysis is crucial for understanding how traits are inherited.

4. **Determining the Release Generation:**
- According to the pedigree method, plants are tested and evaluated up to the F3 generation. After this generation, the plants are deemed stable enough to be released for cultivation.

5. **Reasons for Limiting to F3 Generation:**
- If plants were to be released after the F4 generation or later, they might experience inbreeding depression. Inbreeding depression occurs when closely related plants are bred together, leading to a decline in vigor and fertility.
- Therefore, to avoid inbreeding depression and ensure the stability of desirable traits, plants are only released after the F3 generation.

6. **Conclusion:**
- The correct answer to the question is that plants are tested and released for cultivation up to the F3 generation.

**Final Answer:**
- The plants are tested and released for cultivation up to the F3 generation.

---