光敏核不育水稻的发现,使杂交水稻育种进入两系法的新阶段,并取得了重大进展。湖北省曾率先育成的一批粳两系组合,经繁育制种、区试和生产试验,表现出配组自由、繁种简易、一系两用、育性稳定、杂种无不育细胞质负效应等优越性,但产量优势还不尽如人意。我省早在70年代初也提出两系法育种,并育成一批高自交不育系(对温度敏感)及紫色标记恢复系,可以一制两用,选配出一批籼粳两系组合,终因产量的竞争优势不强,加之不育系育性变化不稳而中断。我们在研究中体会到,育成光敏核不育系,只是解决了手段问题,关键在于广泛测配,从中筛选出产量能超过当地推广品种和现有三系杂种的两系超高产组台,才有育种意义和 The discovery of photo-sensitive genic male sterile rice has made hybrid rice breeding enter a new stage of the two-line method and has made significant progress. Hubei Province has taken the lead in the breeding of a number of japonica two lines of combinations, breeding, regional trials and production trials, showing the team with free, easy to breed species, a series of dual-use, stable fertility, hybrids, no negative effects of infertile cells, etc. Advantages, but the yield advantage is not satisfactory. As early as in the early 1970s, our province also proposed two lines of breeding, and bred a number of high self-fertility lines (temperature-sensitive) and purple marker restorer lines, one system can be dual-use, matching a group of indica and japonica two lines Combination, the final competitive advantage of production is not strong, combined with sterile fertility instability and interruption. We have learned in the study, bred photosensitive male sterile line, just to solve the problem of means, the key lies in a wide range of test, from which the screening of the output can exceed the local varieties and the current three-line hybrid super high yield group of two lines, only Breeding meaning and