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APRELIMINARYSTUDYONTHEMUIANTSWITHOUTMAINVEINSANDPRMALEORGANSOFRICEZhouKaidaWangXudonYanZhibingJinLiang（RiceReeearckInstitute，SichuanAgriculturalUniversity/wenjiang，Sichuan，China611130）1993年夏季，山选自留255的双胜由中，发现1个异型双胚苗，它的一菌正常
In the summer of 1993, Hill chose Shuangsheng from 255, and found that there was one abnormal double-germ seedling, and one of its bacteria was normal. In the summer of 1993,