Question

When two self-incompatible but cross-compatible parental lines are inter-planted, the seeds harvested from both the self-incompatible lines will be:

• A. Composite seeds
• B. Selfed seeds
• C. Hybrid seeds
• D. Inbred seeds

Hint:

Hybrid seed production:
- Self-incompatible lines: Prevent selfing.
- Cross-compatible: Allow cross-pollination.
- Seeds from both lines are hybrids.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
This question tests knowledge of hybrid seed production using self-incompatibility.

Step 2: Detailed Explanation:
When two self-incompatible but cross-compatible parental lines are inter-planted:
- Self-incompatibility prevents self-fertilization within each line.
- Cross-compatibility allows cross-fertilization between the two lines.
- The seeds harvested from both lines will be hybrid seeds (C).
This method is used to produce F1 hybrids in crops like brassicas.
Other options:
- Composite seeds (A): Not a standard term.
- Selfed seeds (B): Not possible due to self-incompatibility.
- Inbred seeds (D): Not possible due to cross-compatibility.
Thus, the seeds harvested will be hybrid seeds.

Step 3: Final Answer:
Thus, the seeds harvested from both self-incompatible lines will be hybrid seeds, which corresponds to option (C).
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