Another new paper finds that the GWAS hits for IQ – largely determined in Europeans – don’t work in people of African descent. That was always a possibility: I’ve talked about it. If you look at the frequencies of height alleles (determined from GWAS in Europeans) you would predict that Pygmies are pretty short – but they’re considerably shorter than that. They have their own private alleles influencing height, which make them even shorter than you would think. Or, if you tried to estimate skin color in Koreans by the frequencies of variants that cause light skin in Europeans, you would conclude that they were black as night – but they’re not. They’re pretty light-skinned, but that’s caused by light-skin alleles common in East Asia, almost completely disjoint from the common light-skin alleles in Europeans.
So you can’t use those GWAS hits to tell how smart sub-Saharan Africans are, at least not today. All you can use are IQ measurements and achievements. It is as if the only way we could determine your height was by using a ruler, instead of GWAS predictions.