矮化育种是水稻育种史上的一次飞跃,但目前育成品种的生产潜力,似乎难有较大的突破。一般常规育成的品种,在温、光无特殊优越的自然条件下,亩产徘徊在千斤左右。主要障碍是:继续增加穗数,粒数则相应减少,群体间相互荫蔽,生理状况恶化; Dwarfing breeding is a leap in the history of rice breeding, but the potential of breeding varieties now seems to have no major breakthrough. Generally cultivated varieties in general, in the warm, light without special superiority in natural conditions, hovering around a thousand kilograms per mu. The main obstacles are: continue to increase the number of spikes, the corresponding reduction in the number of particles, mutual shade between groups, physiological deterioration;