Perhaps after a few generations there is damage that would otherwise have been protected; or maybe the unmethylated FTO protects from adverse weather / environm

Perhaps after a few generations there is damage that would otherwise have been protected; or maybe the unmethylated FTO protects from adverse weather / environmental conditions that are not normally present in greenhouses. Either of those could prove catastrophic, so I don't think yours is a noob question - unfortunately, I am also a noob.