RICE FLOWERING LOCUS T 1 (RFT1) is known as major regulatory gene of floral transition in rice. RFT1 codes for florigen, a mobile signal that moves from the leaves to the apical meristem to switch on the flowering process. RFT1 is regulated by Early heading date 1 (Ehd1) and Days to heading on chromosome 2 (DTH2). RFT1 can certainly activate flowering in the absence of Hd3a expression under SD conditions, however; a secondary role has been given to RFT1 in floral promotion under SD conditions.
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