Describe Vavilov's idea on the centers of crop origins

Vavilov’s idea on the centers of crop origins is that there are areas in the world which are the primary sources of where a certain kind of crop variety exists. He believed that these regions known as the "centers of origin" were the major source of wild varieties of the crop. He proposed that these areas were the sites of ancient cultivation and maintained their genetic diversity over thousands of years. Vavilov argued that by understanding the genetics of crops and the areas they are adapted to, it would allow human beings to manipulate crops to suit different environmental conditions. In this way, he proposed that modern agriculture would be more efficient and yield higher harvests.