D优 68是四川大学水稻研究所用自育的高异交率优良不育系 D62 A作母本 ,与内江市农科所的恢复系多系一号配组而成 ,1 993年定型。1 997年 5月通过四川省农作物品种审定委员会审定。 1 999年从自贡市引进我县进行试验、示范 ,表现产量高、米质优、抗稻瘟病、适应性广等优点。1　 D You 68 is a female parent with high self-education high yield rate sterile line D62 A of Rice Research Institute of Sichuan University. It is made up of a polygamy line with the restoring department of Neijiang Agricultural Science Institute and was shaped in 1993. May 997 through Sichuan Province Crop Variety Approval Committee. In 1999, it introduced from our county in Zigong City for experiments and demonstrations to show the advantages of high output, good quality rice, resistance to rice blast and wide adaptability. 1