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籼型三系不育系69A(曾用名绣丰A)是用优ⅠB与博B杂交,经系统选育,在F5代挑选优良的早熟株与珍汕97A进行回交转育而成。该不育系的不育性和农艺性状稳定,达到了实用不育系的要求。选育过程69A不育系和保持系的选育共利用了3个亲本:优IB和博B、珍汕97A。2000年利用优IB与博B杂交,经系统选育,在F5代挑选优良的早熟单株与珍汕97A进行回交转育。具体选育过程如下。2000年春季在南昌用采用温汤除雄法以优IB为母本
The indica CMS line 69A (formerly named Aifengfeng A) is a hybrid between You ⅠB and BoB, which was bred by the system and backcrossed with Zhenshan 97A in the F5 generation. The sterility and agronomic traits of the CMS were stable and reached the requirements of practical CMS. Breeding 69A CMS and maintainer line selection used a total of three parents: excellent IB and Bo B, Zhenshan 97A. In 2000, using excellent IB and Bo B hybridization, the system selection, in the F5 generation selection of good early-maturing plants and Zhenshan 97A backcross breeding. The specific breeding process is as follows. The spring of 2000 in Nanchang with warm soup removal method to excellent IB as the female parent