It is now pretty clear that NO arose in Southeast Asia (See Refined structure in haplogroup K-M526 (Karafet et al. 2014)) and must have represented Southeast Asian phenotype, which is still the dominating phenotype in people bearing haplogroup O (typical in particular in East India, Indo-China, South and Southwest China, Taiwan).
Yes, I’m aware of that paper. Yet, from this Eurogenes post:
http://eurogenes.blogspot.ca/2013/11/first-genome-of-upper-paleolithic-human.html
“Below is the bar graph from the K=9 (nine ancestral populations assumed) ADMIXTURE analysis, which turned out to be the optimal run. Note that the Mal'ta sample appears mostly South Asian (37%), European (34%), and Amerindian (26%), but also with minor Oceanian ancestry (4%).”
It estimates only 4% of the Mal’ta boy’s genes had the Oceanian-like component.
Similarly, in a post with your name (my apologies if it isn’t your post) on this thread:
http://forwhattheywereweare.blogspot.ca/2013/12/the-malta-adna-findings.html it shows a breakdown of Afontova Gora’s autosomal dna as being:
Globe 4
•70.95% Caucasoid (“European”)
•28.11% Indianid (“Amerindian”)
•0.91% Negroid (“African”)
•0.03% Mongoloid (“Asian”)
Globe13
•62.62% Nordic (“North_European”)
•11.87% Indianid (“Amerindian”)
•10.70% Alpine (“West_Asian”)
•7.45% Veddoid (“South_Asian”)
•6.54% Eskimid (“Arctic”)
•0.61% Paleo-Negrid (“West_African”)
•0.13% Melanesid (“Australasian”)
•0.07% Nilotid (“East_African”)
•0.00% Capoid (“Palaeo_African”)
•0.00% Mediterranean (“Mediterranean”)
•0.00% Orientalid (“Southwest_Asian”)
•0.00% Sinid (“East_Asian”)
•0.00% Tungid (“Siberian”)
So my point is that even if Ydna P originated in Southeast Asia, its apparent Mal’ta and Afontova Gora descendants don’t appear to have had much of their dna in common with people in that region today, based on these breakdowns.