【摘要】 旨在对‘稻花香’进行抽穗期改良，使其获得更广泛的生态适应性。以‘空育131’作为调控抽穗期的Hd1、Ghd7、Ghd7.1基因的早熟型等位基因供体，与‘稻花香’杂交建立遗传群体，运用分子标记辅助选择与传统育种相结合的方法，测得了群体抽穗期的数据。结果表明在群体后代中得到了7种基因型，即Hd1、Ghd7、Ghd7.1、Hd1+Ghd7、Hd1+Ghd7.1、Ghd7+Ghd7.1、Hd1+Ghd7+Ghd7.1。在‘空育131’和‘稻花香’群体中，水稻抽穗时间在97～109 d之间。水稻抽穗时间主要集中在97、101、109 d。对植株抽穗期的调查结果表明，改良后的植株抽穗期明显提前，为进一步改良‘稻花香’奠定了基础。更多还原

【Abstract】 This study aimed at improving the heading date of‘DHX’to obtain more extensive ecological adaptability.‘KY131’was used as the early maturing allele donor of Hd1, Ghd7 and Ghd7.1 genes to control the heading date, and the genetic population was established by crossing with‘DHX’. The data of the heading date of the population was measured by the method of combining molecular marker-assisted selection with traditional breeding. The results showed that seven genotypes in the population progeny were obtained, namely Hd1, Ghd7, Ghd7.1, Hd1+Ghd7, Hd1+Ghd7.1, Ghd7+Ghd7.1 and Hd1+Ghd7+Ghd7.1. In the population of‘KY131’and‘DHX’, the heading date of rice was between 97 d and 109 d. The heading date of rice was mainly 97 d, 101 d and 109 d. Researches on plant tassel stage showed that the improved plants tasseled significantly earlier, which laid a foundation for further improvement of‘DHX’.更多还原