I wouldn't say "no bearing". But if current trends continued, there wouldn't be much left except people, livestock, pets, crop plants (including trees), insect pests, and microorganisms. And stuff in zoos and botanical gardens.

However, that's unlikely. Well before that, human society and population will likely collapse, due to climate change.

GP likely isn't talking about lab-grown experimental GMOs, but regular farming. Many if not most of the food we eat is completely unlike it was before humans invented agriculture.

I think he was referring to boring old selective breeding

Whoever is downvoting this comment is ignorant.

GMOs and cultivars grown in labs not only have no positive effect on biodiversity, they have significant negative effects. See more detailed post above.