Hello See Hes, If you’re going down that exciting path make sure to check out Joseph Lofthouse his ideas on landrace gardening.
He lives in a dessert on a plateau. He had to make his own breeds and has done that. He explains how he has done it. Not overcomplicated, very recommendable book.
You’re looking for someone who already has landraces in Thailand or similar climate. I wish you luck.
The thing is that it is quite rare to find someone who thinks along those lines. And even rarer to find someone who practices what thry preach.
Landraces is a community thing. Seed swaps, gardening neighbors who have a very well adapted veggie growing and are willing to share seeds are all important elements of building landraces.
After reading his book i realized i already do some landracing, but i am going to up my game.
We’re all part of this movement of localizing .
I’m obsessed.
Best wishes!
https://permies.com/wiki/162247/Landrace-Gardening-Joseph-Lofthouse