共查询到18条相似文献,搜索用时 192 毫秒
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杂交水稻新恢复系将恢155AnewricerestorerlineJianghui155将恢155是笔者1981年在县良种场选用抗白叶枯病的恢复系IR26与强优恢复系圭630杂交,1992年春F1再与抗稻瘟病和白叶枯病的恢复系IR54复交,经将乐县和... 相似文献
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《杂交水稻》2010,(Z1)
先恢207是优良的水稻三系恢复系,以先恢207为父本配制的杂交水稻组合金优207和T优207等是长江中下游稻区的主栽晚籼组合。螟虫(包括稻纵卷叶螟、二化螟、三化螟)是中国南方水稻的主要害虫之一。以转cry1C*基因的T1C-19为抗螟虫基因供体,通过杂交、回交和分子标记辅助选择技术相结合的方法将螟虫抗性基因cry1C*转移到恢复系先恢207中,培育获得携有cry1C*基因的纯合株系2个,分别命名为华抗恢1431和华抗恢1432,并以金23A等6个不育系为父本配制了抗螟虫组合。经田间鉴定,改良的抗螟虫恢复系华抗恢1431和华抗恢1432以及杂交组合对稻纵卷叶螟的抗性达到100%。华抗恢1431的农艺性状、稻米品质和配合力等方面基本保持了先恢207的特性,以金23A作母本配制的杂交组合的生育期、产量和稻米品质均与金优207相当。选育出川23A/华抗恢1431、中9A/华抗恢1431 2个产量优于金优207、生育期和稻米品质与金优207相当的中熟晚籼抗螟虫组合。同时还选育出川农1A/华抗恢1431、金科1A/华抗恢1431 2个迟熟晚籼抗螟虫组合。 相似文献
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香5是由湖北省农科院选育的优质两系杂交稻恢复系,所配组合广两优5号(广占63-4S/香5)于2013年通过了湖北省审定.利用回交和分子标记辅助选择技术,将供体亲本MD12086-1351中的抗稻瘟病基因Pi9、抗褐飞虱基因Bph14、Bph15和抗白叶枯病基因Xa23渗入到香5背景中,育成了3个同时携带Pi9、Bph14、Bph15和Xa23基因的新株系.鉴定结果表明,新株系的叶瘟抗性明显提高,穗颈瘟抗性部分提高,苗期抗褐飞虱,分蘖盛期高抗白叶枯病;产量、主要农艺性状、香味和稻米品质主要指标与香5相似.新株系所配的组合在产量、主要农艺性状上与香5所配的组合相似.表明新株系可以作为香5的替代系用于培育抗稻瘟病、抗褐飞虱和抗白叶枯病的两系杂交稻新组合. 相似文献
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利用分子标记辅助选择改良水稻恢复系的稻瘿蚊抗性 总被引:1,自引:0,他引:1
以含有华南4种稻瘿蚊生物型显性抗性基因Gm6的籼稻材料KG18为供体,三系优质恢复系广恢998为受体,通过杂交、多次回交和自交结合分子标记辅助选择技术,将Gm6基因导入广恢998中。综合目标基因的分子检测、田间农艺性状表现以及遗传背景的回复率,筛选获得6个株系。采用稻瘿蚊生物型1和生物型4对这些改良株系进行人工接虫鉴定,6个改良株系的标葱率为0,表现免疫,而对照标葱率均在98%以上,表现高感;由改良株系组配的杂种F1标葱率在10%~20%,表现中抗。农艺性状分析表明,除1个株系在千粒重方面与对照广恢998有显著差异外,其余改良株系性状与对照无显著差异。 相似文献
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水稻恢复系C224对条纹叶枯病的抗性遗传模型分析 总被引:1,自引:0,他引:1
应用植物数量性状"主基因+多基因混合遗传模型"方法分析了C224对条纹叶枯病抗性的遗传效应,并考查了C224与7个保持系组配的杂交组合对条纹叶枯病的抗性。结果表明,C224对条纹叶枯病的抗性遗传符合2对加性-显性-上位性主基因+加性-显性多基因的混合遗传模型(E-1),两对主基因的加性效应分别为-12.47和-24.75,均呈负向显性,上位性和互作效应明显;主基因的遗传率为92.12%,多基因遗传率为2.74%,抗性遗传存在明显的主基因效应。在C224与7个保持系组配的杂交组合中,有5个组合对条纹叶枯病的抗性达到高抗或中抗水平。 相似文献
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GAO Fang-yuan REN Guang-jun LU Xian-jun HE Shu-lin CHEN Xiao-juan LU Dai-hua SUN Shu-xia LI Zhi-hua LIU Guang-chun ZHANG Yi-zheng 《水稻科学》2009,16(3):194-200
Bt5198, a new rice restorer line containing Bt gene, was developed from the cross and backcross of the elite restorer line Chenghui 177 with Bt Minghui 63, a transgenic Bt restorer line. The inbred lines were evaluated using PCR amplification, test paper evaluation, insect resistance evaluation in both the laboratory and paddy fields, nursery evaluation of rice blast resistance and pedigree selection of agronomic traits. Larval mortalities on Bt5198 and Bt Minghui 63 were 100% when rice culms were inoculated with the eggs of the striped stem borer (SSB) in the laboratory. Bt5198 was highly resistant against SSB and the yellow stem borer (YSB) under field conditions. The F1 hybrids derived from Bt5198 and four cytoplasmic male sterile (CMS) lines were also highly resistant to SSB and YSB and had a significant heterosis. Two-year evaluation of rice blast resistance confirmed that the resistance levels of Bt5198 to leaf blast and neck blast were similar to those of Chenghui 177 and significantly better than those of Bt Minghui 63. Seed germination ability and pollen yield of Bt5198 were similar with Chenghui 177, suggesting that the introduction of the Bt gene into the new restorer line had no significant effects on seed vitality or the yield of seed production. To identify the presence of the Bt gene, it was effective to combine test paper examination with the evaluation of insect-resistance, both in the laboratory and under field conditions. 相似文献
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