为了解籽粒灌浆和籽粒产量相关性状的遗传基础，为改良籽粒灌浆特性提供依据，以小穗小粒型水稻Milyang 46和大穗大粒型FJCD建立的包含130个家系的F10重组自交系为研究材料，分析福建省武夷山和莆田环境下水稻籽粒灌浆速率，并结合已构建的遗传图谱进行QTL动态定位及环境互作研究。QTL定位分析共检测到10个加性QTL，位于1、2、5、6、7号染色体上，对表型变异贡献率0.92%~24.41%。同时，qGR-1-4、qGR-2-1、qGR-5-9及qGR-6-7均存在显著的环境互作效应，体现了一因多效。qGR-6-7和qGR-6-8加性均可解释表型变异24.41%。另外，qGR-6-7的环境互作效应可解释表型变异贡献率9.33%。

In order to understand relationships between grain filling and other related grain yield traits at gene level and improve grain filling characteristics in rice, this study used quantitative trait loci (QTL) mapping to research grain-filling rate from a RIL including 130 lines deriving from Milyang 46 and FJCD. This research carried in Wuyishan and Putian, Fujian Province. The results were detected 10 additive QTL in two environments, located in chromosome 1, 2, 5, 6, 7, and the contribution rate for phenotype variance were from 0.92% to 24.41%. Among them, qGR-1-4, qGR-2-1, qGR-5-9 and qGR-6-7 existed significant additive × environment interaction effects, manifesting “pleiotropic effects”. Additive effects of qGR-6-7 and qGR-6-8 accounted for 24.41% of the phenotypic variation respectively. Furthermore, additive × environment interaction effect of qGR-6-7 accounted for 9.33% of the phenotypic variation.