Cell number counts - The fw2.2 and CNR genes and implications for controlling plant fruit and organ size

► Cell number control and quantitative trait variation of fruit size. ► Functional conservation of cell number regulators in diverse plants and organs. ► Molecular function of the cell number regulators. ► Cell number control and crop improvement: crop domestication, hybrid vigor and crop yield, transgenic manipulation of cell number regulators for crop improvement. ► Perspectives on cell number control in future studies.