If that happened in the field, she says, wild oats might run amok in the western U.S., outcompeting native grasses with kudzu-like intensity.

• 她说，这种情形如果发生在野外，获得抗病毒基因的野生燕麦便可能以燎原之势席捲美国西部，将其他原生草类逼得走投无路。