Originally Posted by
Duffmannn
The SSA admixture in Peru is concentrated in the coastal northern zone, from Lima to the ecuadorian frontier. Outside this zone the SSA must be near 0%, pretty much as the neighbour countries Bolivia and Chile.
I suppose that also inside this zone the SSA in also heavily concentrated in specific racial-social groups. For example I have never found a peruvian in Spain not remotely SSA admixed, while I have found heavily admixed ecuadorians, or many colombians also show low SSa admix here.
That supposition wouldn´t be strange. Even in countries where the SSA is generalised and everywhere as Colombia, Venezuela, Brasil, Cuba, Puerto Rico or Dominican Republic, the high and middle classes that score more than 75% euro, have almost always more amerindian than black admixture, the difference is even bigger within the people over the 85-90% euro range, where the SSA is almost nonexistant.
Even looking at this chart, if you know something about latinamerican genetics, can see that segregation. In the countries where the SSA admixture is noticeable (Brazil, Puerto Rico, Dominican Republic, Cuba, Venezuela, Colombia) the range 40-60% is under the middle european ancestry of those countries, all of them are around 60% european ancestry, more or less (55% Dominican Republic; Colombia, Venezuela 60%; Puerto Rico, Brazil 65% ), except Cuba that is around 70-75% european middle ancestry.
Well, even on this group, that must be low class, but not lumpen or people completely outside the society, the SSA admixture is in middle term low: in the case of Venezuela and Colombia clearly under the national SSA, average, in the case of Brazil, Puerto Rico and Dominican Republic around the same the national average, and Cuba clearly over the national middle average.
Cuba would be an special case, as it is a heavily admixed euro contry, the group 40-60% is the group with less european ancestry that exist (there are barely cubans with less 40% euro ancestry) is the lower limit of the society, so the SSA admix that tends to an strong segregation concentrates here; they haven´t no amerindian admixture. That´s the reason why the country with more european ancestry, it´s the one with more SSA admixture in this chart. The upper euro-subgroups, 60-80% euro and 80-100%, have substancial and noticeable more amerindian admixture than this one (that has probably near 0%), and while we approximate more to 100% euro, the difference between black and amerindian apportation tend to deepen in favor of the second.
But this example of Cuba low class would apply to other countries. Lumpen from Dominican Republic, Puerto Rico, Venezuela, Colombia or Brazil must have a higher african ancestry than Cuban one, as in middle national term they have the same SSA admixture like Cuba. Would be a nonsense that having more or less the same (Brazil, Puerto Rico, Venezuela) or much more (Dominican Republic) african ancestry than Cuba, those countries would have less SSA admixture on this chart. The explanation would be that the SSA concentrates heavily in the next euro chart subgroup, the 20-40% (nonexistant in Cuba), that as the case of Cuba would have scarce to any amerindian input. As the 20-40% is the minimum euro group existant in Venezuela, Puerto Rico and Brazil, would be here where the african input concentrates, pretty much as Cuba.
Dominican Republic or Colombia have even the category 0-20% euro, composed of haitian inmigrants and their descendants in the first case, and chocoanos in the second one.
These last categories, 0-20% and 20-40% euro, would explain the difference of 20 points in the european input between Cuba and the Dominican Republic.
Also this last category would explain the relatively SSA admixture of Colombia in this chart compared with their pars. As the SSA admixture in the country would be very concentrated in these last groups (0-20% group would be majority in Choco, and 20-40% group with high afro admixture would be abundant in the Caribbean coast), with scarce contribution in the 40-60% group as showed, and practically nonexistant in the 60-80% and 80-100% groups.
[We must take into account that SSA in Colombia is also lower than in the mentioned countries, but also it´s much more concentrated. For a useful analysis the colombian chart would exclude many colombians in the 40-60 range that live in andean zones with no SSA admixture that distorts the chart, because in the rest of analysed countries SSA is in all zones]
While Venezuela is a more triracial country that Colombia, as it is more caribbean coastal influenced, a prolongation (saving distances) of the colombian Caribbean. That would explain having the double SSA that Colombia on this chart. But as Venezuela lacks the 0-20% euro group that exists in Colombia, the 40-60% euro venezuelan group would be near the least euro group existant on the country, 20-40% euro, and that would explain the higher SSA admixture respect to Colombia on the chart. In both countries the SSA concentrates in the last two groups that exist, but the last two groups of Colombia are 0-20 and 20-40, in Venezuela are 20-40 and 40-60. As I have said the SSA tends to concentrate in the least euro group always and as in comparable regions between both countries (entire Venezuela --- Caribbean, Antioquia, Choco, Cauca regions in Colombia) the SSA must be similar, the difference on the char between both countries must be the heavier concentration of the SSA in other least and non-analysed euro groups in Colombia.
As conclusion: the SSA always tends to place in the lowest euro group of all countries, always. Depending on how middle term euro is the country, the SSA would concentrate in one subgroup of other.
Latin America
Amerindian Ancestry in white brazilians from Gedmatch
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