选用化感作用潜力差异较大的 5个水稻品种 (系 ) ,按不完全双列杂交设计 (4× 5 )配制成一套包括亲本、F1两个世代的遗传材料 ,在不同环境条件下 ,测定其不同叶龄时期对受体植物莴苣幼苗茎长的抑制作用 .采用包括基因型与环境互作的数量性状加性 显性发育遗传模型 ,分析了水稻化感作用的动态遗传及与环境互作效应 .结果表明 ,水稻叶龄在 7叶期对莴苣茎长的化感作用受加性效应的影响 ,在 3叶期和 6叶期由显性效应控制 ,在 5叶期和 8叶期加性和显性效应均有作用 ,以显性效应为主 ,呈现间断表达的遗传特点 .普通狭义遗传率在 5叶期、7叶期和 8叶期达显著水平 ,随叶龄增大趋于下降 .水稻化感作用受基因型与环境互作效应的影响较大 ,应注意控制水稻生长发育的环境 ,以达到最佳利用水稻化感作用潜力的目的 . Five rice cultivars (lines) with different allelopathic potentials were selected, and a set of genetic materials including parents and F1 generations were prepared according to the incomplete double crosses design (4 × 5). Under different environmental conditions, And its different leaf age on the lettuce seedling stem length of receptor plants.According to quantitative trait plus dominant dominant developmental genetic model including interaction of genotype and environment, this paper analyzed the dynamic inheritance of allelopathy and interaction with environment The results showed that the allelopathic effects of leaf age at 7-leaf stage on lettuce stem length were affected by the additive effect and controlled by the dominant effect at the 3-and 6-leaf stage. At the 5-and 8-leaf stage Sexual and dominance effects, with dominant effect, showing the intermittent expression of genetic characteristics.General narrow sense of heritability in the 5-leaf stage, 7-leaf stage and 8-leaf stage reached a significant level, with the leaf age tends to increase The allelopathic effect of rice is greatly affected by the interaction between genotype and environment, and the environment for controlling the growth and development of rice should be controlled so as to achieve the potential of optimal utilization of the allelopathic potential of rice.