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杂交中籼新组合Ⅱ优８３８ⅡＹｏｕ８３８，ａｎｅｗｍｅｄｉｕｍｉｎｄｉｃａｈｙｂｒｉｄｒｉｃｅ广华容邓达胜杨成明邓文敏（四川省原子核应用技术研究所６１００６６）Ⅱ优８３８是四川省原子核应用技术研究所用Ⅱ－３２Ａ为母本与辐恢８３８配组而成的高产、优质、高效杂交中稻新组合。１９９５年５月通过四川省农作物品种审定委员会审定。同年１０月列入四川省“九五”重点科技成果推广项目。辐恢８３８是用辐射诱变方法与粘糯变种间杂交相结合育成的配合力强、花粉充足，对雄性不育恢复结实特别好的新恢复系，用３０个野败型、Ｄ型、冈型和印尼水田谷型不育系测配平均恢复度为９５．８％，比对照明恢６３高３．９％。１产量表现Ⅱ优８３８于１９９０年育成，１９９１～１９９２年２ａ比较试验平均产量８．９９ｔ／ｈｍ２，比汕优６３增产８．９％；与Ⅱ优６３对比试验产量９．０６ｔ／ｈｍ２，增产１５．１％。１９９３～１９９４年２ａ参加四川省区试平均产量８．２３ｔ／ｈｍ２，比汕优６３增产５．１６％，居第１位，其中在川东片区６个点比汕优６３增产１７．８％。１９９４年参加全国杂交稻中籼迟熟组区试平均产量９．０７ｔ／ｈｍ２，增产３．７６％，居首位。四川省生产试验５个生态区平?
Ⅱ You 838ⅡYou838, anewmediumindicahybridrice Guangya Rong Dandasheng Yang Chengming Deng Wenmin (Institute of Atomic Energy, Sichuan Province 610066) Ⅱ You 838 is a combination of Ⅱ-32A and Radix-838 in Sichuan Institute of Applied Nuclear Techniques Into the high yield, high quality, high efficiency hybrid mid-season new combinations. May 1995 through the Sichuan Crop Variety Approval Committee validation. In October the same year included in Sichuan Province “Nine Five” key scientific and technological achievements promotion project. Radix 838 is a new restorer line with strong binding ability, sufficient pollen and strong male sterility, which was formed by the combination of radiation mutagenesis and sticky waxy varieties. With 30 wild-type, D-type, The average recovery of paddy-rice CMS line in paddy field and Indonesia was 95.8%, 3.9% higher than that of the control. 1 Yield performance Ⅱ You 838 was bred in 1990, from 1991 to 1992, the average yield of comparative experiment 2a was 8.99 t / hm2, 8.9% higher than that of Shanyou 63. Compared with Ⅱ You 63, the yield of test was 9.06t / hm2, 15.1%. From 1993 to 1994, 2a participated in the trial production of Sichuan Province with an average yield of 8.23t / hm2 and a 5.16% increase over that of Shanyou 63, ranking No. 1 in which 6 points in the eastern Sichuan area increased by 17.8% . In 1994, the average yield of medium indica late japonica hybrid rice in the national trial was 9.07 t / hm2, an increase of 3.76%, ranking first. Sichuan Province production test five ecological zones?