PROBLEM TO BE SOLVED: To accelerate the flowering time more slowly than a conventionally known flowering inducing gene. SOLUTION: A novel flowering induction gene (ScFT6 gene, ScZCN16 gene) derived from sugar cane and encoding a protein consisting of the amino acid sequence of SEQ ID NO: 2 or 4. [Selection diagram] Fig. 1【課題】従来公知の花成誘導遺伝子よりも花成誘導能が緩やかに花成時期を早める。【解決手段】サトウキビに由来し、配列番号2又は4のアミノ酸配列からなるタンパク質をコードする新規な花成誘導遺伝子(ScFT6遺伝子、ScZCN16遺伝子)。【選択図】図1