All the researchers in the Behavior Genetics Association are not expecting any strong associations to be found in this study. The strongest association with SAT scores high enough for getting into the Study of Exceptional Talent, as my son did, is competent reading instruction (provided by homeschooling in our home) and competent math instruction (provided by east Asian or south Asian parents, for many SET members) in elementary education. Simply improving the quality of elementary education in the United States could change the composition of that group quite a bit, with no new shuffling of genes.
See
Johnson, W. (2010). Understanding the Genetics of Intelligence: Can Height Help? Can Corn Oil?. Current Directions in Psychological Science, 19(3), 177-182.
http://apsychoserver.psych.arizona.edu/JJBAReprints/PSYC621/Johnson%20Current%20Directions%20Psych%20Science%202010%20(G%20and%20E%20in%20IQ).pdf
for illumination of the key issues by a mathematically astute researcher on the genetics of human intelligence.
