[目的]对玉米重组自交系苗期耐盐相关性状进行QTL定位.[方法]以玉米黄早四与Mo17杂交的RIL-F7代171份材料为作图群体,构建其玉米的分子标记遗传图谱,并在此基础上开展对玉米耐盐相差性状的QTL分析.[结果]构建了一张包含81个SSR位点,覆盖了玉米基因组10条染色体,共1428.3 cM,标记间平均间距为17.63 cM的分子遗传连锁图谱；共检测到6个QTL,分别位于第1、5、6号染色体上.[结论]该研究对深入认识玉米耐盐遗传机理,了解控制玉米耐盐性的基因数目及其在染色体上的位置以及对耐盐性的遗传效应,进行玉米耐盐性育种的分子标记辅助选择和基因克隆均具有极其重要意义.%The cytokinin signaling pathway consists of a phosphorelay mechanism that is initiated by binding of cytokinin to histidine kinase re ceptors (AHK) and induces them to autophosphorylate. This phosphate group is subsequently transferred to histidine phosphotransfer proteins ( AHPs). In the nucleus, phosphorylated AHPs transfer the phosphate to a set of response regulators ( ARRs). Type-B response regulators en code transcription factors that act as major players in the transcriptional activation of cytokinin-responsive genes, among which there are many transcription factors. In this review, we summarize recent progresses of cytokinin signal transduction mechanism.
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