Abstract Shoot branching in plants (including tillering in graminaceous crops) is a key agronomic trait affecting plant architecture, resource allocation, and final yield. Branching is a complex developmental process modulated by genetic networks regulating axillary meristem (AM) initiation and subsequent bud activation. This review summarizes the genetic regulatory networks identified in model plants, specifically Arabidopsis thaliana (a dicot) and Oryza sativa (a monocot).
