I have not beck peddled at all and you are deluding yourself as a result of your poor reading comprehension skills...and you still haven't fund It is found an example of a beneficial genetic mutation caused by radiation, what you found is an example of one experiment, many of which are ongoing, to find plants that have an unusual resistance to damage by radiation. The reason for this destroys your whole argument, essentially, There is an obvious reason why radiation resistant plants are being developed at extreme expense. Can you guess what that reason is?
Could it be that radiation at the planet's surface is increasing?

LMAO!