 This study compared the microRNAome 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. This article was authored by Yucca Chin, Yijuan Li, Wusiaming, and others.