The F-box protein CHALK10 mediates SEMIDWARF-1 ubiquitination and degradation to negatively regulate grain chalkiness in rice

increased grain chalkiness. The expression of genes related to starch degradation or biosynthesis was altered in the chalk10 mutant, resulting in reduced starch production and increased metabolizable sugar content in the endosperm. In summary, our findings reveal a novel regulatory mechanism of chalkiness and provide potential targets for improving rice quality.