Gene modification proposed to bring back near extinct American chestnut
Scientists have proposed using gene modification to revive the American chestnut tree, which was nearly driven to extinction by a fungal blight in the early 20th century. The genetic engineering approach aims to make the trees resistant to the blight, potentially restoring a once-dominant species in eastern U.S. forests.
Background
- The American chestnut tree once dominated Eastern US forests but was nearly wiped out by an introduced fungal blight in the early 1900s. It is functionally extinct — still sprouting from roots but dying before maturity.
- Genetic engineering, rather than selective breeding, is now being proposed to restore it. The leading approach involves inserting a wheat gene that produces an enzyme that detoxifies the blight's acid.
- The nonprofit American Chestnut Foundation has been working on this for decades. A genetically modified version called the Darling 58 was developed but faced regulatory hurdles with the EPA, FDA, and USDA.
- The debate touches on broader tensions: some conservationists support GMO-assisted restoration as a necessary tool, while critics worry about unintended ecological effects or oppose genetic modification on principle.
- Why it matters: The chestnut's return could reshape forest ecology, carbon storage, and wildlife habitat across millions of acres. But regulatory approval and public acceptance remain unresolved.