Seed Banks Delay Gene Drive Spread in Plants
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- The study modeled gene‑drive dynamics in plants and was published in Nature Plants (2026), showing how seed‑bank dormancy can affect spread.
- CAIN is a laboratory‑engineered gene‑drive system that the model predicts will spread mutations, but its speed is slowed by long‑lived seed banks.
- ClvR is another lab‑engineered gene‑drive system with similar spread dynamics, also hindered by seed‑bank persistence.
- seed banks can re‑introduce non‑engineered plants for years or decades, lengthening the time needed for a gene drive to dominate a population.
- Jaehee Kim noted that overcoming seed‑bank effects may require a larger initial release of engineered seeds or plants to “drown out” stored seeds.
- Philipp Messer said the seed‑bank effect can act as an “evolutionary buffer,” providing a natural biosafety mechanism that could cause an accidental gene drive to die out.
Why it matters: Researchers and agritech firms gain a clearer roadmap for designing weed‑control gene drives, while regulators obtain a natural safety net in seed banks that can curb unintended spread; the study forces larger initial releases to offset seed‑bank buffering, altering deployment strategies.
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