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 ...

One approach is based on conventional plant breeding techniques and has been crossing blight and PRR-resistant Chinese chestnuts with the American type. PRR resistance has been found to be less ...