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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。
Growth traits and yield-related traits such as plant height, number of panicles per panicle, panicle length, number of panicles per panicle, total grains per panicle and seed setting rate were all important agronomic traits in rice, and new traits and yield-related traits QTL is of great importance for cloning and controlling the new gene of rice yield traits and for improving the yield traits of rice by molecular polymerization breeding. Two groups of recombinant inbred lines (BG1 and XLJ) derived from two parents (BG1 and XLJ) with significant differences in their growth and panicle traits were used as materials and tested under the two environmental conditions of Hangzhou (2011) and Hainan (2012) The QTLs affecting rice growth and panicle related traits were also analyzed. The epistatic effects of QTLs and the interaction with the environment were analyzed. A total of 32 QTLs affecting reproductive stage and yield-related traits were detected on chromosomes 2, 3, 4, 5, 6, 7 and 8. In addition, five pairs of two-factor interactions and five QTLs Environmental interaction. The detected QTLs affecting yield traits were similar to those of previous studies, and the effect was large. Most of the QTLs that could be detected stably in different environments were clustered. The epistasis of QTLs for important yield traits and their relationship with environment Of the interaction effects are small, indicating a small interaction between genes and genes and the environment.