Majors resume preferences when hiring

First, I am not a dispatcher, just curious about possibly entering the profession and reading the Reddit.

I saw a post recently that said (I don’t remember exactly, but something like) X major airline doesn’t like to hire people from Y regional.

Since there aren’t that many majors, is there a chart or list of, say, for each major, which airlines they DO like to hire from and which airlines they DON’T like to hire from? What about when it comes to mid-size airlines like JetBlue, do they also have similar preferences or places they prefer not to hire from?

If I enter this profession, I have a few preconceived notions about which majors I would or wouldn’t want to end up at one day, so this feels like good info to have.