Hd3a is a member of the FT-like family and shares 91% of identity with RFT1, the closest homologue. Although there is evidence that FT-L1/FTL is possibly involved in flowering, Hd3a and RFT1 are considered to be the major contributors of the FT-like members to floral promotion since suppression of both Hd3a and RFT1 expression results in no flowering.
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