中文摘要：

生育期及产量相关性状如株高、单株有效穗数、穗长、每穗实粒数、每穗总粒数和结实率等是水稻重要的农艺性状,发掘新的生育期及产量相关性状 QTL,对克隆控制水稻产量性状新基因及利用分子聚合育种改良水稻产量性状具有重要意义。以两个在生育期及穗部性状上具有明显差异的亲本（BG1和 XLJ）衍生的重组自交系群体为材料,在杭州（2011年）和海南（2012年）两个环境条件下,检测了影响水稻生育期及穗部相关性状的 QTL,并对 QTL 上位性效应及与环境的互作进行了分析。共检测出影响生育期及产量相关性状的32个 QTL,分布于第2、3、4、5、6、7和8染色体上,此外,分别检出5对双因子互作和5个 QTL 与环境互作。检测到的影响产量性状的 QTL 与前人研究结果相近的区间,其中效应较大、在不同环境下能被稳定检测到的 QTL 大都表现为成簇分布；重要产量性状 QTL 的上位性及与环境的互作效应均较小,说明基因间及基因与环境间的互作较小。

英文摘要：

Heading date and yield-related traits including plant height （PH）,number of tillers per plant （NTP）,panicle length （PL）,number of filled grains per panicle （NFGP）,grain number per panicle （GNPP）and seed setting rate （SR）are important agronomic traits in rice.Detection of new QTL associated with heading date and yield-related traits have great significance in new genes identification and utilization of rice.We used a recombination inbred lines （RILs） population derived from BG1/XLJ to detect QTL associated with heading date and yield-related traits in two environments,effects of epistatic and interaction with environments were also analyzed.A total of 32 QTL associated with heading date and yield traits were detected on chromosomes 2,3,4,5 ,6,7 and 8.Furthermore,five pairs of QTL intervals had significant two-factor epistatic effects,and 5 QTL had significant interaction with environments. Many yield related QTL detected were identified near the intervals where yield-related QTL were detected in previous researches.Among them, the QTL with large effects commonly clustered.Low epistatic and interaction with environments effects for yield related QTL,indicated small interactive effects between genes,genes and environments.