An object of the present invention is to provide a transformed plant of the genus Periwinkle, which has an external gene integrated into its genome. A transformed plant in which a foreign gene has been integrated into the genome of a plant of the genus Periwinkle. [Selection diagram] None【課題】外部遺伝子をゲノムに組み込んだキョウチクトウ科ニチニチソウ属の形質転換植物体を提供すること。【解決手段】外来遺伝子がキョウチクトウ科ニチニチソウ属の植物のゲノムに組み込まれている形質転換植物体。【選択図】なし