Genetic and Environmental Control of Rice Tillering

Increasing tiller number is a target of high-yield rice breeding.Identification of tiller-defect mutants and their corresponding genes is helpful for clarifying the molecular mechanism of rice tillering.Summarizing research progress on the two processes of rice tiller formation,namely the formation and growth of axil-lary meristem,this paper reviews the effects of genetic factors,endogenous hormones,and exogenous environment on rice tillering,finding that multiple molecular mechanisms and signal pathways regulat-ing rice tillering cooperate rice tillering,and discusses future research objectives and application of its regulatory mechanism.Elucidation of theis mechanism will be helpful for breeding high-yielding rice cul-tivars with ideal plant type via molecular design breeding.