杂交水稻制种的过程是将两个不同的品种在同一田块进行相间种植,使其同步生殖生长的过程。在这一过程中,由于这两个品种的亲缘关系不同,故其株高和对赤霉素(“920”)的敏感性不可能一致,这就不可避免地将出现一个株高差。这个株高差对杂交水稻制种产量的影响及如何控制和利用这个株高差是一个值得充分探讨的课题。 Hybrid rice seed production process is the two different varieties in the same plots for planting, so that the process of simultaneous reproductive growth. In this process, due to the different genetic relationship between the two cultivars, its plant height is not likely to be sensitive to gibberellic acid (“920”), which inevitably results in a plant height difference. The effect of this height difference on the hybrid rice seed production and how to control and utilize this height difference is a subject worth exploring fully.