alt Hacker News> their wild propagation
In general, crop plants don't propagate well in the wild. The whole point of breeding a crop plant is to remove their chemical defenses (to make them edible) and to make them produce lots of edible parts. This is usually the direct opposite of what plants need to survive in the wild.
The wind carries pollen from the crops long distances, where it cross-pollinates with other crops, some of which are grown from seed.
This is a real thing that happens. There have been major court cases about it, like this one from Canada https://en.wikipedia.org/wiki/Monsanto_Canada_Inc_v_Schmeise...