It protects the tree by breaking down a toxin created ... s backcross breeding program are a cross between Chinese and American trees. Chestnut trees freely hybridize, and other hybrid varieties exist ...

From left to right, the trees are a blight-susceptible wild-type American chestnut (C. dentata) called Ellis 1, a blight-resistant Chinese chestnut (C. mollissima) tree called 'Qing,' and two ...

cross-breeding the tree with other chestnut species and developing a virus that fights the blight fungus. The West Virginia ...

cross-breeding the tree with other chestnut species or developing a virus that fights the blight fungus. The West Virginia ...