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运用 冬性有极 显著差异 的２ 个甘 蓝材料（７２２４９ 、旅１４１５４ ２４） ，对低温 诱导花 芽分化的温度、诱 导的起 始苗龄、诱 导持续 的时 间 及诱 导 后花 芽生 长 的温 度及 时 间进 行了 比 较试 验。 提出以７ ～８ 叶苗龄、５ ℃低温诱 导５０ ｄ ，光周 期１２ ｈ ，而 后转 入昼 温／ 夜 温＝ ２５ ～３０ ℃／１５ ～２０ ℃，１５ ｄ ，测定花 芽分化级 数，计算 花芽分化 指数，以 此对甘蓝 进行冬 性鉴 定。运 用此 方法 ，对 ２ 份 自交 系、８份春早 熟组合 进行了冬 性鉴定。
Using two cabbage materials (7224-9, Lvl4154 24) with extremely significant difference in winter, the effects of temperature on induction of flower bud differentiation, duration of induction initiation, duration of induction and After induction of flower bud growth temperature and time were compared. It was proposed that seedling stage of 7-8 leaves, hypothermia of 5 ℃ for 50 days and photoperiod of 12 h, then transferred to day temperature / night temperature = 25-30 ℃ / 15-20 ℃ for 15 days, Index, as a winter identification cabbage. Using this method, two inbred lines, eight spring early maturing combinations were identified.