总结了福建农林大学农业生态研究所十多年来有关杂交水稻籽粒灌浆过程所涉及到的干物质积累与分配、强弱势粒发育进程的颖果形态解剖结构及其相关酶活性、激素含量的变化和强弱势淀粉积累动态等发育生理。以及在不同生态条件下。籽粒发育的动态遗传特性和胞质负效应对杂交水稻籽粒灌浆相关过程的影响等遗传生态学的研究成果，并就目前杂交水稻产量与品质形成研究中存在的问题做一阐述，在此基础上提出了今后作物栽培学研究的新方法与新思路。

The

选用具有较强化感作用的6个水稻品种为供体，大田种草为受体，研究了水稻化感作用及生理生化特性。结果表明，提高水稻叶片浸提液浓度，可以相应增强对种草生长的抵制效果，这种抑制效果与杂草的种植密度呈负相关：化感水稻叶片浸提液能显著抑制捭草体内超氧化物歧化酶（SOD）和过氧化氢酶（CAT）的活性，从而影响其生长；苯丙氨酸氨解酶（PAL）的活性大小与酚类物质的含量呈正相关；多种酚类物质的化感作用之间可能是增效的，也可能是拮抗的。

Five parental rice varieties with differentt allelopathic potentials were used for diallel cross based on [P P+1 /2] design to get genetic materials including parental lines and two generations of F1s. The dynamics of heterosis for allelopathy in rice at different leaf stages was analyzed using additive-dominant developmental genetic model. The results showed that heterosis in both F1 and F2 was inhibitory to shoot and root length of lettuce (Lactuca sativa L). The heterotic effects in allelopathy varied with the leaf stage of rice accession. Simultaneous backcrossing and selfing breeding method was used to develop the hybrid rice with allelopathic activity and the isogenic hybrid rice with non-allelopathic effect on weeds. It was also indicated that heterotic effect on allelopathy in rice was positively-significant, showing higher heterosis over midparent. This hybrid rice had the additive suppressive effect on the target weed barnyardgrass, exhibiting a large deviation from the resource competition curve. Thus we improved the genetic performance of the trait in this hybrid combination for commercial use.

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