I'll make the assumption that you mean EUGENICS.
Adolf Hitler never studied eugenics. He left that up to his more intelligent disciples. However, the main thrust of "his" argument was to keep the aryan race pure for a better German Reich that would last a thousand years, which was "pie in the sky", because he accepted that arabs were Aryan, when, in fact, they are the same race as the original Jews. This muddled thinking assumed that all Jews were the same race when they are not. Judaism is not a race, it is a religion (some might say a way of life) that is passed on by the mother. Therefore, if an Israeli Jewess married a muslim man one could argue that any children (and descendants of femail children) were Jews. But, to answer your question: Adolph Hitler did not have any influence on modern-day eugenics, just on the prejudices that often come with the "scientists".