Methods and composition for the production of non-flowering or late flowering sorghum hybrid. For example, in certain aspects methods for use of molecular markers that constitute the Ma5/Ma6 pathway to modulate photoperiod sensitivity are described. The invention allows the production of plants having improved productivity and biomass generation.
 This invention was made with government support under grant number DBI-0321578 awarded by the U.S. National Science Foundation and grant number DE-FG02-06ER64306 awarded by the U.S. Department of Energy. The United States government has certain rights in the invention.