Rice (Oryza sativa L.) is one of the most important crops in the world, and an immense progress has been made in the utilization of dwarfing gene and heterosis. From now on, the major aim is to increase its yield per acreage, because it is very difficult to increase area due to the smaller and smaller agricultural acreage per capita resulted from the increasing population and scarcity of water resource. Among all kinds of approach increasing yield per acreage, raising efficiency for solar energy utilization...