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籼型两用核不育系Ｆ１３１Ｓ，是用安农Ｓ－１与密籼广陆矮杂交，从Ｆ_２代起采用定向单株选择法育成的。初步确认Ｆ１３１Ｓ属低温敏两用核不育系，是早籼早熟类型。不育期育性稳定，不育期长达８０ｄ以上，不育株率和不育度均达１００％；农艺性状整齐一致，开花习性较好，异交结实率和自交结实率都较高；配合力强，配组优势明显优于三系杂交水稻，具有广阔的开发利用价值。
The indica dual-purpose male sterile line F131S was bred by the hybridization of Annong S-1 and Mianyang Guanglu, and was cultivated by directional single plant selection from the F2 generation. Preliminary confirmed F131S is a low temperature sensitive dual-purpose nuclear sterile lines, is the early indica precocious types. The sterile period was stable, the period of sterile period was more than 80 days, the rate of sterile plants and the sterility reached 100%. The agronomic characters were neat and consistent, the flowering habits were better, the rate of outcrossing and selfing ; With strong, with three groups obviously superior to three-line hybrid rice, has a broad development and utilization value.