中文摘要：

在海南岛冬季短日照条件下，分2次种植珍汕97和明恢63构建的重组自交系群体，利用超高密度SNP遗传连锁图检测抽穗期QTL，将结果与武汉夏季长日照条件下7组抽穗期QTL定位结果进行比较，探究长日照和短日照条件下QTL的差异。两地结果的主要差别在于：武汉长日照条件下抽穗期的主效QTL定位在第7染色体着丝粒附近，但该QTL在海南短日照条件下无显著效应；在海南条件下检测到第6染色体物理位置9.12~9.65 Mb处一个效应很大的QTL，在武汉条件下效应不显著。本研究结果进一步完善了该群体抽穗期的遗传研究，增进了对水稻长短日照条件下抽穗期遗传基础的理解。

英文摘要：

A population of recombinant inbred lines derived from the cross between rice varieties Zhenshan 97 and Minghui 63 was examined for heading date in two plantings （winter in Hainan and summer in Wuhan） to analyze QTLs for heading date using an ultra-high density SNP linkage map. Comparison of the results from the short-day Hainan winter and long-day Wuhan summer revealed large differences of QTLs between the two conditions. The main QTL for heading date in long-day environ- ment of Wuhan was detected near the centromere of chromosome 7,but its effect was not significant in Hainan short-day environment. In contrast a major QTL for heading date was detected in the region of 9.12-9.65 Mb on chromosome 6 in Hainan but its effect was not significant in Wuhan conditions. The results will be useful for understanding the genetic basis of rice flowering.