优质籼型水稻温敏核不育系228S的选育与利用

Breeding and Utilization of Indica TGMS Line 228S with Good Grain Quality in Rice

228S是广东华茂高科种业有限公司用安农S为母本，与高州镇江野生稻杂交，F2代筛选不育株再与培矮64S杂交选育而成的籼型水稻温敏核不育系，2005年10月通过广东省科技厅组织的技术鉴定。228S在茂名的稳定不育期比培矮64S长5～6d，不育期不育性稳定，株叶形态好，稻米品质达国标优质稻谷2级标准，开花习性好，对“九二О”敏感，繁殖制种产量高。所配组合茂杂29（228S／茂恢29）2006年12月通过广东省品种审定。

228S is a new thermo-sensitive genetic male sterile （TGMS） line in indica rice, which is developed by Guangdong Huamao High-Tech Seed Industry Co. Ltd. through crossing Annong S （ as the female） to a single plant selected from the Zhenjiang wild rice of Gaozhou, Guangdong and then crossing an elite male sterile plant selected from its F2 progeny to Pei＇ai 64S. It was technically identified in Guangdong Province in October, 2005. In Maoming, the stable male sterile period of 228S was 5 - 6 days longer than that of Pei＇ai 64S. Its male sterility in the sterile period was very stable. Furthermore, it showed a good plant type, a good grain quality （conforming to the state standards for the 2nd class of fine quality rice of China）, and a high seed production yield for its good flowering habits and response to GA3. One of its hybrid combinations, Maoza 29, derived from 228S and Maohui 29, had been registered and released to commercial production in Guangdong Province by December, 2006.