It's amazing to me that people are still claiming to do beneficial work when they work on improving yields or size in this case. The amount of food (let alone the size of vegetables) we produce is already enough to feed everyone, but we throw away at least a third of the food we produce (the internet is full of references for that) instead of distributing it fairly where it is needed the most (one part of the world is obese, another is malnourished).

It is clear beyond doubt that the real difficulty we're facing with food production is to sensibly set the limits of supply, so that excesses are avoided and to organise distribution so that everyone has as much as they need. Larger vegetables are not really a problem in the real world.

As to resistance to drought, while we're already in the shit for good with the amount of warming expected in the next decades, the root of the problem is not that our vegetables can't handle drought, it's that we have continue to fuck the environment and destabilise the ability of the planet to feed us. Solve this problem and stop faffing about with irrelevant bullshit.