粳型水稻光敏核不育系7001S的育性与利用研究

在合肥自然条件下，连续６年（１９８７～１９９２）观察了７００１Ｓ育性和主要特征特性，研究了繁殖制种等配套技术。结果表明：（１）７００１Ｓ属早熟晚粳型，播始历期１２２（单季制种）～８０（双季繁殖）天。（２）不育期不育性稳定〔花粉败率率（ＳＰ）９９．０５％～９９．９４％，自交结实率（ＳＳ）０．００％～０．１３％〕，不育期３０天以上，主要集中在８月；育性转换明显，转换期在９月５±２日；可育期可育度高（ＳＰ７５．６１８％～２２．１２２％，ＳＳ６．２５％～４４．００％）。（３）配组优势显著，已选育出两个通过省级区域试验待审定的粳杂组合；繁殖制种产量高，配套技术易于操作。讨论了７００１Ｓ的实用性和适宜的应用范围。

Study on the Fertility of Japonica PGMR 7001S and its utilization

belonged to early maturing late japonica rice with 122(Seed production)-- 88(multiplication) days from seeding to heading. The sterile stage was mainly in August and more than 30 days,and the sterility showed stable,the rates of sterile pollen and seed setting were 99. 05% -- 99. 94% and 0. 00%-0. 13%, respectively. 7001S'fertility changed obviously on September 5±2. In the fertile stage, SP was 75. 618%--22. 122% and SS was 6. 250%--44. 000%. Vigor of 7001S'F1 hybrids existed strong,and 2 combinations which had passed provincial region test were selected. The utilization of 7001S was also discussed in this paper.