If incompatibility reaction of pollen is governed by the genotype of the plant on which the pollen is produced, then the self-incompatibility is designated as
Show Hint
- gametophytic
- sporophytic
- pseudo
- obligate
The Correct Option is B
Solution and Explanation
Self-incompatibility (SI) prevents self-fertilization in angiosperms through genetically controlled pollen-pistil rejection.
Step 2: Detailed Explanation:
1. Sporophytic Self-Incompatibility (SSI): The incompatibility phenotype of the pollen grain is determined by the diploid ($2n$) genotype of the parent plant (sporophyte) that produced it (e.g., Brassicaceae, Asteraceae).
2. Gametophytic Self-Incompatibility (GSI): The incompatibility phenotype of the pollen is governed strictly by the haploid ($n$) $S$-allele carried within the individual pollen grain itself (e.g., Solanaceae, Poaceae, Rosaceae).
Step 3: Final Answer:
Therefore, this self-incompatibility system is designated as sporophytic.
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