Wow!
I knew of the mixed fibers ban, but not the context. It now makes much more sense.
No mules?
No three sisters planting?
Hybrid corn probably ok as it’s different strains of the same kind/corn?
Yes corn is fine.
There is a ton written about mules, actually. If it happens by accident, what to do, etc. May or may not be OK, depending on if you consider a horse and donkey the same “kind”. Opinions differ.
As with a bunch of other close questions (e.g. fruit trees, dogs and wolves, etc). Things that breed naturally give rise to reasoned disagreement.
But an alligator and catfish? Nope.
And the “because I said so” makes perfect sense now in the age of DNA splicing. Some horrid monsters will one day arise from this.