Once a plant is established in a new environment it will adapt to this new place and change its DNA by doing this, it is what we call acclimatation so a genetic from anywhere in the world grown in a specific region of the USA for example will become adapted to the new climate and soil she is grown in. The geographical origin of a genetic is not so relevant anymore after a few generations of growing in a different place, that's why we can call an Afghan grown for many years in the USA an american genetic.
I'm from France and I know someone who have grown Thai genetic in the south of my country outdoor for many years, now this specific genetic is not a Thai anymore but a Thai who is adapted to her new environment making it a new genetic, as we all know:
-Phenotype= genotype + environment. The DNA of the strain will evolve generation after generation to become something different from what it was in its original country. This phenomenon is why we can call a strain from anywhere in the world a french strain or dutch strain after enough generations of it being grown in her new place.
You talking about growing the same clone outdoors year after year ?