[mcv]

As far as I understand, it doesn't have any kind of boosted resistance or anything, so it shouldn't dominate and replace wild rice the way other modified rice might.

That said, if farmers move from producing a wide variety of rice strains to only golden rice, that's still a significant reduction in biodiversity. Maybe they should make beta-carotene versions of more kinds of rice.

Mixing in a few greens is surprisingly hard when people are almost too poor to buy rice.

[evjim]

Biodiversity, I think is the biggest problem. The potato blight spread so rampently because mostly one clone of the exact potato was being grown everywhere. Some sort of rice or corn blight would be catastrophic.

[mcv]

Absolutely true. Also consider the fate of the Gros Michel banana. Biodiversity is vital for our food production, and GMOs definitely carry the risk of creating monocultures.