 This study compared the micro-RNAome of a red-fleshed sweet orange mutant with its wild type. It found that 51 known myrnors were differentially expressed between the two types, while 12 new myrnors were discovered. Additionally, 418 target genes were predicted to be affected by these myrnors, many of which are related to photosynthesis and carotenoid biosynthesis. These findings suggest that the myRNAome may play an important role in the regulation of lycopene accumulation in the sweet orange-red flesh mutant. This article was offered by Yuka Ching, Yi Juinli, Wu Xiamen, and others.