Why is it difficult to popularize hybrid rice in Yuan Longping in the world?

(1) The main reason is state control. In other words, China restricts the export of hybrid rice to ensure the outflow of its own germplasm resources and maintain China's leading position in the field of rice.

Yuan Longping: A pioneer and leader in the field of hybrid rice research, he devoted himself to the research of hybrid rice, and successively developed the first and second phases of three-line hybrid rice, two-line hybrid rice and super hybrid rice. At the same time, Yuan Longping put forward and implemented the "Three Crops and Four High Yields Project", using the technical achievements of super hybrid rice, published 6 monographs in Chinese and English, and published more than 60 papers.