Which plant breeding step is very tedious and time-consuming

Options

A. Selection and testing of superior recombinants
B. Cross hybridisation among the selected parents
C. Collection of variability
D. Evalution and selection of parents.

Answer

### Step-by-Step Solution:

1. **Understanding Plant Breeding**: Plant breeding involves the genetic improvement of plants to enhance desirable traits for human benefits. This process includes various steps aimed at creating new plant varieties.

2. **Identifying the Steps in Plant Breeding**: The key steps in plant breeding typically include:
- Selection and testing of superior recombinations
- Crossing and hybridization among selected parents
- Collection of variability
- Evaluation and selection of parents

3. **Analyzing Each Step**:
- **Selection and Testing of Superior Recombination**: This step involves evaluating different plant combinations to identify the best traits. It is systematic but not extremely time-consuming.
- **Crossing and Hybridization Among Selected Parents**: This step involves the actual crossing of plants to combine desirable traits. It requires careful planning and execution, making it a lengthy and tedious process.
- **Collection of Variability**: This step involves gathering a range of genetic material and is generally straightforward and quick.
- **Evaluation and Selection of Parents**: This step involves assessing potential parent plants for breeding. It is also not particularly time-consuming.

4. **Conclusion**: Among the steps analyzed, the most tedious and time-consuming step in plant breeding is "crossing and hybridization among the selected parents". This is because it involves the careful combination of desirable genes, which requires time and precision.

### Final Answer:
The plant breeding step that is very tedious and time-consuming is **crossing and hybridization among the selected parents**.

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