Single-gene controlled self-incompatibility appears in certain species of__________________?
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Answer: D. All the above
Explanation
Single gene controlled self incompatibility appears in numerous species across major plant families. The Cruciferae, Solanaceae, and Leguminosae families all contain species with this genetic system. A single multi-allelic locus successfully regulates pollen rejection in these diverse families. Self incompatibility is a widespread evolutionary strategy preventing inbreeding depression in plants. The genetic control mechanism can be sporophytic or gametophytic depending on taxonomic group. Family groupings share fundamental floral and genetic characteristics inherited from common ancestors.
Understanding these family-wide mechanisms helps breeders develop hybrid cultivars in vegetables. Crop management in fields often requires diverse pollinator species to overcome incompatibility barriers. Genomic research continues to unravel the complex signaling pathways involved in pollen rejection. Option a is incomplete because Solanaceae and Leguminosae also exhibit this genetic control. Option b is incomplete since Cruciferae and Leguminosae share this self incompatibility trait. Option c is incomplete because Cruciferae and Solanaceae are equally valid examples.
- Subject
- Agriculture
- Category
- Agriculture
- Topic
- —
- Difficulty
- medium
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