A new study says genetic testing can speed the return of the American chestnut tree that once dominated Eastern U.S. forests. The tree was functionally extinct by the 1950s because of a fungal ...

Add Yahoo as a preferred source to see more of our stories on Google. FILE - Vernon Coffey, left, William Powell and Andy Newhouse prepare to harvest genetically modified chestnut samples at the State ...

Scientists Say Genetic Analysis Could Greatly Speed Restoration of Iconic American Chestnut WASHINGTON (AP) — Billions of American chestnut trees once covered the eastern United States. They soared in ...

For more than a century, the American chestnut, once a dominant tree across eastern North American forests, has been devastated by an invasive fungal disease that killed billions of trees in the early ...