一、选育、配组和鉴定过程 激光4号是我组1975年春用IR8经氦、氖激光诱变选育而成。该品种在武昌3月下旬播种,7月底至8月初成熟,比广陆矮4号还迟熟几天,作为早稻,在湖北无利用价值。但鉴于它来源于IR系统,而比目前生产上用的杂交水稻恢复系泰引1号、IR24、IR661等生育期都短,同时株型好,结实率高,遂转而探求其对野败型不育系是否有恢 First, breeding, matching and identification process Laser 4 is my group in the spring of 1975 by IR8 helium, neon laser mutation breeding. The breed was planted in Wuchang in late March and matured from the end of July to the beginning of August, a few days later than Guanglu Dwarf No. 4. As an early rice, it had no utilization value in Hubei. However, in view of its origin in the IR system, it is shorter than that of the current hybrid rice restorer line Taiyin-1, IR24, IR661, etc., and has a good plant type and high seed setting rate. Is there any recovery of CMS?