Temperature and gene expression analysis of the percentage of ray floret and disk floret in chrysanthemum

研究了温度和与射线小花和圆盘小花数目和比例相关的基因表达的影响。夏秋花型菊花‘iwa-no-hakusen’的花盘小花数随温度升高而增加，秋花型菊花‘津巴’和小花型菊花‘夏子’的花盘小花率随温度的升高而降低。分离到与花盘小花形成相关的温度条件和花发育阶段表达的特异片段。对这些片段进行了序列测定和同源性搜索。

Effects of temperature and gene expression related to the number and percentage of ray floret and disk floret were investigated. The percentage of disk floret was increased by high temperature in summer-to-autumn flowering type chrysanthemum,'Iwa-no-hakusen', and decreased by low temperature in autumn flowering type chrysanthemum,'Jinba' and small flowering type chrysanthemum,'Natsuko'. Specific fragments expressed under the temperature condition and the flower development stage related to the formation of disk floret were isolated. The sequence and the homology search of these fragments were investigated.