采用数量性状的加性-显性发育遗传模型分析了按NC Ⅱ交配设计的两套籼型三系杂交水稻地上部干物质重的发育遗传规律。结果表明,在不同发育阶段,地上部干物质重以显性效应为主,控制地上部干物质重的加性效应基因几乎不表达,而显性效应基因在两年中的表达呈连续性,且在生长中期活动强度最大,环境和基因型互作会影响地上部干物质重加性效应基因的表达,而对显性效应基因表达的影响不明显,随着发育进程的推进,地上部干物质重杂种优势趋于减弱。 The quantitative trait additive-dominance genetic model was used to analyze the developmental genetic patterns of shoot dry weight of two sets of three-line indica hybrid rice designed by NC Ⅱ mating. The results showed that at different developmental stages, the aboveground dry matter was dominated by the dominant effect, while the additive effect genes controlling the dry matter weight at the shoots were barely expressed. However, the dominant effect genes were found to be continuous in two years, And had the highest activity intensity in the mid-growth stage. The interaction between environment and genotypes affected the expression of dry weight re-additive effect genes in shoots, but had no obvious effect on the expression of dominant effect genes. As the development progressed, Heavy weight hybrids tended to weaken.