While this is nothing to shake a stick at:
> The "Super Rice" Yuan is now working on yields are 30 percent higher than those of common rice.
The famines experienced by the communist regimes were not due to the quality of available breeds, but simply due to the lack of functioning price signals and the fact that production was directed by central authorities.
See also https://direct.mit.edu/jcws/article/19/3/42/13671/Political-...