利用一个 DH群体研究了控制抽穗期的 QTL ,实验分别在杭州 (HZ)和海南 (HN)两地进行 ,抽穗期分别在 4个和 3个不同发育阶段调查 .结果表明 :在 2个环境和 7个发育阶段中共检测到 8个QTL,分别分布在第 1,6,8,10 ,12号染色体上 .其中 ,2个 QTL,q HD- 1- 1和 q HD- 12能在 2个环境中检测到 ,其它只能在 1个环境中检测到 .在 HN中一个 QTL q HD- 10 - 1主要在发芽后 75～ 85 d检测到其效应 ,它可解释 19.6%的变异 .在 HZ一个主效 QTL q HD- 8- 1在发芽后 80～ 90 d时检测到效应 .其它的QTL只在某一阶段表达 .最后讨论了抽穗期 QTL的作用模式及其在育种中应用 The QTLs for controlling heading date were studied using a DH population, and the experiments were conducted in HZ and HN respectively. The heading date was investigated in 4 and 3 different developmental stages respectively. The results showed that in two environments and Eight QTLs were detected in seven developmental stages and distributed on chromosomes 1, 6, 8, 10 and 12. Among them, two QTLs, q HD-1- 1 and q HD-12, While others were detected in only one environment.A QTL q HD-10 - 1 in HN detected its effect mainly from 75 to 85 days after germination, which could account for 19.6% of the variation.An HZ The main effect QTL q HD- 8- 1 detected the effect at 80-90 d after germination.The other QTLs were only expressed at a certain stage.Finally, the mode of QTL at heading stage and its application in breeding