Landraces and heirloom (Part 1)

New genetical Analysis says Cannabis emerged from China:
The News:

The Study:
https://advances.sciencemag.org/content/7/29/eabg2286

An excerpt:

“An unexpected result was the presence of this Basal genetic group, which did not comprise any of the domesticated plants we consider today as Cannabis sativa (hemp or marijuana),” Fumagalli said. “It’s a bit like discovering a dog breed unknown to date and genetically independent from the genetic cluster grouping all dog breeds described today worldwide.”

Does this mean there was no Crosspolination between Wild / Domestication, or does it mean the new Cluster doesent interfere with the old cluster?

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