I think there are varieties of Citrus that do better in Texas.
Also preferred Orange varieties that do better in Texas from a commercial standpoint, i.e. colour, sweetness, ripening time , freeze tolerance etc.
That's just from bits of info that have stuck in my mind.
Probably Texas Citrus organisations or Ag extension etc would have good info.
There are probably historic early varieties right thru to new varieties as the industry changed.