there are several new "blight free" chestnut strains that have been developed by doing some gene splicing between Asian chestnuts, some "volunteer" American chestnut whips, and another "host tree" that helps in the blight resistance.
The crossing of Asian and American whips only produced a "Resistant" strain which usually dies at about 20 to 3o years. Ive seen several of these blight immune trees at the PEnn State research center so maybe. (Ive got my name in to get one when theyre available. Which reinforces the addage about optimism)
"Where an old man plants a tree under whose branches he shall never sit"
Of course, I repeat my admonition about all things GM. "We had better employ a better understanding of Dr Mandelbrott and explore the long term effects of anything GM before we just fling it out to the world and then discover later that our good intentions did NOT consider long term negative effects. (sort of like "roundup ready" cisgenes in soybeans has created "Superstrains" of pigweeds and foxtails and some other plants that can smother hay fields with ,toxic or valueless, crap made up of rapid spreading grasses).