Key Crop from the Columbian Exchange

The Columbian Exchange introduced a variety of new goods and ideas between the Americas and Europe after the voyages of Columbus. This exchange had profound effects on the agriculture, economy, and population dynamics of both regions. Among the crops that made their way from the Americas to Europe was a certain tuber that would later become a staple food source. This crop significantly influenced European diets and agricultural practices in the centuries to follow.

What was this important crop that emerged from the Columbian Exchange and helped support population growth in Europe?