Abstract:Tillering (branching) is a major determinant of crop yield that is controlled by plant hormones, growth and environment factors, et al. Some new branching genes and regulatory mechanisms recently reported in monocots have contributed to our knowledge of tillering/branching. The tillering/branching relate genes and regulatory mechanisms represented by gramineous plants were reviewed. The similarities and differences of tillering/branching regulatory mechanism between eudicots and monocots were compared in the perspectives of hormone, gene, transcription. These provides theoretical basis for the formation of plants yield, the adaptation to environment, and the enhancement of survival competition ability.