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利用籼型光温敏核不育系蜀光612S与蜀恢881配组成两优681，经试验、示范表明，比对照汕优63具有早熟、丰产、抗稻瘟病、米质优、制种产量高的特点。
The indica type light-thermo-sensitive genic male sterile line Shuangguang 612S and Shuhui 881 was used to form Liangyou 681. The results showed that compared with Shanyou 63, the two lines had the characteristics of early maturity, high yield, blast resistance, high quality of rice, High characteristics.