Though Burmese are a good donor for the Tibeto-Burman in Burmese, it seems pretty clear now that I have Tibetan samples that the Bangladeshi samples are a bit more Tibetan-skewed than these Burmese samples. It may be that the early admixture into Bengal was from a Burmese population that had admixed less with the Austro-Asiatic substrate of Burma.
Note that this confirms the Austro-Asiatic populations have a totally different (more southern) East Asian ancestry source.
Nice. I kinda deduced this a while back with my kinda amateur-ish runs on qpAdm but yeah Bangladeshis tend to score significant amounts of UYR/Himalayan/Tibetic type ancestries.
pheno wise there is that deviation too, some look Tibeto-Burmese shifted while others look more Himalayan shifted. I think I’m one of the more Tibetic ones because people suggest that I look Nepali and stuff while one of my bros for instance has a more “balanced” Tibeto-Burman type shift.
but that’s just my anthrotard coming out lol
Do we know when this admixture happened? It could be the original Pyu migration?