There is another approach, breeding the American with the Chinese, keeping the trees with blight resistance and American form, and back-crossing to the American. I think the fourth generation is out there now, I would plant the fifth generation, 31/32 American.
There are also some really resistant big trees in the Alleghenies.
Another virture of chestnuts is that they like disturbed soil and can be used to reforest strip mined areas.
Were participating in the project and have planted about a dozen of the trees.
We report regularly on their progress.
I think the approach shows a lot of promise.