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 ,研究了按双列杂交设计 (5× 6 ) 2配制的 1套包括亲本、F1 2个世代的水稻遗传材料对受体植物莴苣幼苗根长化感作用的动态遗传及与环境互作效应。遗传方差分析表明 ,控制水稻不同叶龄期化感作用的加性效应与显性效应呈交替表达趋势 ,叶龄在 7叶期受加性效应控制 ,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共同作用 ,以显性效应为主。这解释了在化感作用研究过程中发现的间断性表型表现的遗传原因。普通狭义遗传率随叶龄增大趋于下降。基因型与环境互作效应对水稻化感作用的影响较大 ,据此讨论了如何结合应用水稻化感作用的加性和显性遗传效应 ,开展化感抗草性水稻品种选育及其化感作用水稻杂种优势的利用研究 A quantitative trait-plus-dominance developmental genetic model including genotype-environment interaction was used to study the effect of 1 set of rice genetic materials including parents and F1 generation on the receptor Dynamic inheritance of long sense of root in plant lettuce and its interaction with environment. Genetic variance analysis showed that the additive and dominant effects of allelopathic effects at different leaf ages were alternately expressed. The leaf age was controlled by the additive effect at the 7-leaf stage, and at the 3-and 6-leaf stage, the dominant Effect control, at the 5-leaf stage and the 8-leaf stage, both additive and dominance effects, dominated by the dominant effect. This explains the genetic causes of intermittent phenotypic manifestations found during the study of allelopathy. General narrow heritability tends to decrease with leaf age. The interaction between genotype and environment has a great influence on the allelopathic effect of rice. Based on this, we discussed how to combine the additive and dominance genetic effects of allelopathic rice, Study on Utilization of Rice Heterosis