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davisYC

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davisYC
·vor 5 Jahren·discuss
graham was on my committee and i know him personally even before grad school (this is razib).

from the acknowledgments his 2013 paper https://journals.plos.org/plosbiology/article?id=10.1371/jou...

"Thanks to Razib Khan, Sharon Browning, and Don Conrad for several useful discussions"

you can nitpick the piece but this is from an attack piece on me:

"MANY PROMINENT geneticists familiar with Khan’s work do take him seriously. “I don’t agree with everything that Razib writes, but I think that he does write about population genetics very clearly,” said Graham Coop, a population genetic"

so yes, put your faith in graham :-) you know his work so little you weren't aware i was going to easily pivot in this direction
davisYC
·vor 5 Jahren·discuss
yeah. no idea why it's even called 'davisYC' aside from the fact i lived in davis then -razib
davisYC
·vor 5 Jahren·discuss
the rule of thumb for mammals is Ne is 30% of census size.

i think this is probably an overestimate tbh (assumes poisson distribution of offspring).
davisYC
·vor 5 Jahren·discuss
you can infer sizes from genetic diversity ('effective pop')

for the out of africa group i've seen sizes from 100 to 10,000. i used 1,000 to 10,000 as a likely moderate number, and the range also points to the census size being larger

we can assume that conditional on the size of OoA the other groups were way larger (10x or more). otoh, the main thing i did not explore is that i am now believing that africans themselves especially agriculturalists are 'compounds' of various bottlenecked groups (why west africans are closer to eurasians than they are to khoisan)
davisYC
·vor 5 Jahren·discuss
i talk about introgression in this post https://razib.substack.com/p/here-be-humans

the piece was not exhaustive and meant to be an intro