共查询到19条相似文献,搜索用时 250 毫秒
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利用税粳亚种间杂交产生的强大杂种优势是杂交水稻育种继品种间杂种优势利用之后提高产量的重要手段。通过舢粳交选育广亲和基因的不育系或恢复系是实现舢粳亚种间杂种优势的主要途径。经过10余年的努力,用轮回422与选10-19杂交选育成的广亲和舢粳中间型恢复系465与印水型不育系优IA配组而成的杂交晚稻优1465,初步实现了亚种间的杂种优势利用。多年多点多组区试和生产试验结果表明,优1465是一个高产稳产、抗稻瘟病、米质较优的杂交稻新组合。该组合已于1998年3月通过江西省品种审定委员会审定。(-)产量表现1995年优1465首次参加江西… 相似文献
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三系法籼粳亚种杂交水稻研究的初步进展 总被引:7,自引:0,他引:7
笔者自1985年开始三系法籼粳亚种间杂交水稻研究工作,至1989年已初步育成了一 批籼粳亚种杂交水稻的早、中、晚稻组合,其穗型大小、结实率和千粒重等,比同熟期的当家常 规稻和品种间杂交稻都有大幅度超出。在轮回422/选10-19组合分离后代中,选育了多种熟期和生态类型的广亲和恢复系。 相似文献
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水稻籼粳核质核杂种研究初探 总被引:2,自引:0,他引:2
籼质粳核核质杂种配普通籼稻,粳质籼核核质杂种配普通粳稻,以及这两种核质杂种互交F1,称之为核质核杂种.研究表明,核质核杂种既保持了或基本保持了籼粳稻亚种间的杂种优势水平,又克服了籼粳稻亚种间不亲和的问题、植株超高问题和不能正常抽穗等问题.探索了一条亚种间杂种优势利用的新途径. 相似文献
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杂交稻新品种谷优2736作中稻高产制种技术 总被引:1,自引:0,他引:1
谷优2736是以不育系谷丰A和恢复系福恢2736配组育成的晚籼杂交水稻新品种,2014年通过福建省农作物品种审定。介绍了谷优2736亲本的特征特性,并结合2010-2013年的制种生产实践,总结了其作中稻高产制种技术。 相似文献
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Practices and Prospects of Super Hybrid Rice Breeding 总被引:4,自引:0,他引:4
CHEN Li-yun XIAO Ying-hui TANG Wen-bang LEI Dong-yang 《水稻科学》2007,14(2):71-77
The great progress in super rice breeding both in China and other countries has been made in recent years. However, there were three main problems in super rice breeding: 1) the super rice varieties were still rare; 2) most super rice varieties exhibited narrow adaptability; and 3) current breeding theories emphasized too much on the rice growth model, but they were unpractical in guidance for rice breeding. According to the authors’ experience on the rice breeding, the breeding strategies including three steps (super parent breeding, super hybrid rice breeding and super hybrid rice seed production) were proposed, and the objectives of each step and the key technologies to achieve the goals were elucidated in detail. The super parent of hybrid rice should exhibit excellent performance in all agronomic traits, with the yield or sink capacity reached the level of the hybrid rice control in regional trials. The super hybrid rice combination should meet the following criteria: good rice quality, wide adaptation, lodging resistance, resistance to main insects and diseases, and the yield exceeded above 8% over the control varieties in the national and provincial regional trials. To achieve the goal, the technical strategies, such as selecting optimal combination of the parents, increasing selection pressure, paying more attention to harmony of ideal plant type, excellent physiological traits and all the agronomic traits, should be emphasized. The yield of seed production should reach 3.75 t/ha and 5.25 t/ha for the super hybrid rice combinations derived from early-season and middle-season types of male sterile lines, respectively. The main technologies for raising seed production yield included selecting optimum seed production site, using the male sterile line with large sink capacity and good outcrossing characteristics, and improving the amount of the pollen by intensive cultivation of the male parent. According to the technologies of the three-step breeding on super hybrid rice, two super rice parents, including a male parent 996 and a thermo(photo)-genic male sterile [T(P)GMS] line C815S, were bred. Furthermore, a super early hybrid rice combination, Luliangyou 996, which could be used as a double-season early rice variety in middle and lower reaches of the Yangtze River, China, was bred by using the super rice variety 996 as the male parent, and several hybrid rice combinations with higher yield than control variety in regional trials both of Hunan Province and state were bred with the T(P)GMS line C815S as the female parent. 相似文献
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