几组有优和无优杂交组合中杂交稻及其亲本光合功能的比较

研究了3个杂交组合的杂交稻及其亲本的光合功能。实验结果表明，杂交稻的叶绿素(Chl)和类胡萝卜素(Car)的含量高于其亲本。在2组有优杂交组合中，杂交稻的PSⅡ活性、PSⅡ原初光能转化效率和叶片潜在光合作用量子转化效率，以及光合电子传递能力和对两个光系统之间激发能分配的调节能力，均高于其各自的亲本。此外，上述各光合功能又以母本优于父本。然而，在无优组合中，上述的光合功能却是父本高于母本和它们的子一代。根据所得的实验结果，进一步证实在配置杂交组合时，选择具有优良光合功能的母本，是获得在生产上可推广应用的杂交稻的重要途径之一。

The Comparison of Photosynthetic Functions Among Hybrid Rice and Their Parents in Some Heterosis and Non-Heterosis Hybrid Combinations

The comparison of photsynthetic functions among hybrid rice and their parents has been studied. The experimental results show that the chlorophyll and cartenoid contents per unit fresh weigh of leaf in hybrid rice are higher than those in their parents. The potential activity and the efficiency of primary conversion of light energy of PSⅡ , the efficiency of potential photosynthetic quantum conversion of a leaf, the photosynthetic electron transport rate and the regulation capability of excitation energy distribution between PSⅡ and PSⅠ induced by Mg2+ in hybrid rice are higher than those in their parents from the hybrid combinations possessing heterosis. In addition, the above mentioned photosynthetic functions of their female parents are better than those of their male parents, respectively. Howoever, these functions of male parent are better than those of female parent and their hybrid rice in non-heterosis hybrid combination. The experimental results futher suggest that the female parents possessing excellent photosynthetic functions should be chosen when hybrid combinations are made. It is an important way to obtain good hybrid rice to be popularized and applied in rice production.