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Interesting. What I meant though was introgression with closer groups. IE there clearly were surviving populations that didn't go through the major sapien funne

Interesting. What I meant though was introgression with closer groups. IE there clearly were surviving populations that didn't go through the major sapien funnels. Their descendants are in the "very diverse" group. Obviously there was, is and will be "introgression" with them. Were there other such groups, in or out of sub-saharan africa... whos genes we carry?

valarauko 5y ago
I'm not sure what you mean by the other closer groups. My understanding of the field is that when anatomically modern humans expanded out of Africa for the first time 60Kya, they encountered Neanderthals and eventually Denisovans. What other "closer" group was out there for them to encounter? The other anatomically modern humans were all in Africa, and it looks like there's been no interbreeding with them for at least 100K years. There has been a small introgression back into Africa by non-Africans within the last few thousand years, but that's a separate issue.
- dalbasal 5y ago
  Other Sapiens. People whos descendants would have been group 3, if a descendant population had survived to modern times. 90% of the DNA for groups 2 & 3 comes from those 1000-10,000 individuals. A small smattering from neanderthals denisovans and ghosts. What's the rest? There were anatomically modern humans outside of sub-saharan africa at some point. They just don't have descendants. But, my question applies either way. What matters is that they descend from groups outside of the funnel group, not where they lived.
  - valarauko 5y ago
    > 90% of the DNA for groups 2 & 3 comes from those 1000-10,000 individuals. A small smattering from neanderthals denisovans and ghosts. What's the rest? That's not my understanding of the text. Other than the 2-5% Neanderthal & Denisovan contributions, the rest of our (ie, for non-Africans) ancestry arises entirely from this single group of 1-10k, not 90%. Perhaps you're confusing it with this statement? > ... only 1,000-10,000 lucky humans made it through the impossibly narrow neck. Our best (always provisional) models suggest they dwindled from an earlier population maybe 10 times bigger. So this round of cuts diminished the breeding pool by 90%.

valarauko 5y ago

I'm not sure what you mean by the other closer groups. My understanding of the field is that when anatomically modern humans expanded out of Africa for the first time 60Kya, they encountered Neanderthals and eventually Denisovans. What other "closer" group was out there for them to encounter? The other anatomically modern humans were all in Africa, and it looks like there's been no interbreeding with them for at least 100K years. There has been a small introgression back into Africa by non-Africans within the last few thousand years, but that's a separate issue.

dalbasal 5y ago
Other Sapiens. People whos descendants would have been group 3, if a descendant population had survived to modern times. 90% of the DNA for groups 2 & 3 comes from those 1000-10,000 individuals. A small smattering from neanderthals denisovans and ghosts. What's the rest? There were anatomically modern humans outside of sub-saharan africa at some point. They just don't have descendants. But, my question applies either way. What matters is that they descend from groups outside of the funnel group, not where they lived.
- valarauko 5y ago
  > 90% of the DNA for groups 2 & 3 comes from those 1000-10,000 individuals. A small smattering from neanderthals denisovans and ghosts. What's the rest? That's not my understanding of the text. Other than the 2-5% Neanderthal & Denisovan contributions, the rest of our (ie, for non-Africans) ancestry arises entirely from this single group of 1-10k, not 90%. Perhaps you're confusing it with this statement? > ... only 1,000-10,000 lucky humans made it through the impossibly narrow neck. Our best (always provisional) models suggest they dwindled from an earlier population maybe 10 times bigger. So this round of cuts diminished the breeding pool by 90%.