Spotted this in a serious science book by a notable author. As as man of science this isn't an issue to me, and I'd heard of it in other areas of agriculture. Nevertheless, the mention of a specific grain I use did rather jump out at me
"Mutant barley and oats are widely grown in Europe. In the UK, Golden Promise barley, a mutant created by zapping plants with gamma rays, is grown to make beer and whisky. There's no danger at all from the radiation in the crops that are being grown - it's already done it's work, scrambling DNA in their ancestors, and producing useful variants."
From Chapter 6 of "Tamed - Ten Species That Changed Our World" by Prof. Alice Roberts
"Mutant barley and oats are widely grown in Europe. In the UK, Golden Promise barley, a mutant created by zapping plants with gamma rays, is grown to make beer and whisky. There's no danger at all from the radiation in the crops that are being grown - it's already done it's work, scrambling DNA in their ancestors, and producing useful variants."
From Chapter 6 of "Tamed - Ten Species That Changed Our World" by Prof. Alice Roberts