Brassica napus,the second largest oil crops in the world,attracted great economic and scientific attention with regard to regulation of seed yield.Deciphering the schedules for inflorescence differentiation at transcription level is very helpful for better understanding the switch roles of certain genes in economically and efficiently underlying pods per plant especially pods on main inflorescence in B.napus.It would promote the development of new varieties in B.napus with high-yield potential via molecular breeding or genetic improvement.