中文摘要：

采用解剖技术和石蜡切片对春性萝卜品种JXDY-13的花芽分化进行观察,结果发现花原基形成后,首先分化出4个萼片原基的突起,随后在萼片原基内侧形成6个雄蕊原基,并进一步向内分化形成雌蕊原基,最后在萼片原基和雄蕊原基之间完成舌状的花瓣原基的发育。根据这一特征变化将花芽分化的整个过程分为未分化期、花原基分化期、萼片原基分化期、雄蕊原基分化期、雌蕊原基分化期和花瓣原基分化期等6个时期。在此基础上应用花芽分化指数,通过研究低温诱导时间对花芽分化程度的影响,发现4℃低温诱导13d为该品种萝卜的最佳春化条件。

英文摘要：

In this paper, the process of the flower bud differentiation on JXDY-13 Radish was observed by the technology of paraffin section and dissection. The results showed that the bud differentiation process was included into non-differentiation, floral rudimentum, calyx, stamen, pistil and petal differentiation period. On this basis with flower bud differentiation index, the optimal vernalization condition was found for this variety, it was 13 days under 4℃.