水稻杂种优势利用,是通过人工育成水稻三系(不育系、保持系、恢复系)来实现的.将不育系和保持系种在一起,使不育系种子得以发展,称之为不育系繁殖.将不育系和恢复系种在一起,配出杂交水稻供生产应用,称之为杂交水稻制种.在三系繁殖扩大的过程中为了防止变异退化,必须不断地进行三系原种提纯.这些都是技术性比较强的新工作,需要不断探索、总结,使之完善.近年来,我区各地试种杂交水稻普遍获得了增产.一个群众性的制种繁殖工作正在逐步展开,为了配合这项工作,我们特提出如下技术要点,供各地参考.一、杂交水稻制种的技术要点杂交水稻的配制工作,直接关系到水稻杂种优势利用的成效.不仅要努力提高制种产量而且要注意保证杂种纯度,在现有条件下,要求每亩制种能获得50斤 The utilization of heterosis in rice is achieved through the artificial breeding of three lines of rice (CMS, maintainer and restorer), and the sterile lines and maintainers are planted together to make CMS seeds develop, which is called Reproduction of male sterile lines and restorer lines planted with hybrid rice for the production and application, called hybrid rice seed production in the process of expanding the three-line breeding in order to prevent mutation degeneration, must continue to three lines These are all highly technical new jobs that need to be continually explored, summed up and refined. In recent years, hybrid rice varieties tested and popularized in various districts of our region have generally been increased. A mass production and breeding work is gradually being carried out In order to cooperate with this work, we put forward the following technical points for reference: First, the technical points of hybrid rice seed production Hybrid rice preparation work, is directly related to the utilization of rice heterosis, not only to improve seed production And should pay attention to ensure the purity of hybrids, under the existing conditions, the system required per acre can get 50 pounds