Unfortunately, if we don't have the reference dataset samples with which to compare your DNA, we cannot determine any similarities between your DNA and certain aboriginal/native tribes/specific families. In order to clearly and accurately distinguish results into equal detail as we have done for the UK, autosomal sample data fulfilling very specific criteria will have to be collected and our reference datasets will have to be rebuilt. This is a process that takes years.
With respect to Native American/ Australian Aboriginal ancestry, we don’t currently have good surrogate information, but we do have a fair number of East Asian samples in our reference dataset. We would expect to see a significant amount of DNA shared with these populations in someone with true Native American ancestry. A motherline or fatherline result reflecting a typically Native American/Aboriginal haplogroup may also be indicative of the existence of such ancestry in your genealogy.
It is possible to confirm Native American/Aboriginal ancestry in your traditional genealogical (aka paper trail) family tree, but not have it found in your genetic ancestry--depending on how far back in your genealogy your Native ancestor can be found, they may not have passed down enough detectable segments of DNA all the way down to you. It is not unheard of to lose all genetic trace of a Native ancestor after 4 generations, and this is more common after 7 or 8 generations. These resources can hopefully help you understand and shed some further light into this:
Historically, tribes also adopted non-Native individuals. In these cases, that individual and/or their descendants may have been raised as Native, are recognised as Native and identify with Native culture, however, their genetic ancestry will be non-Native.
In most cases, but especially for Native/Aboriginal ancestry, DNA testing cannot replace the need for traditional genealogical paper trails.
If we can report on additional populations in the future, our list of worldwide regions will be updated and test results will be refined.