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Rice mutation after flown in space 总被引:2,自引:0,他引:2
0 INTRODUCTIONNew genotypesareinstrongdemandtosatisfyhumanneedsandenvironmentalfactorsimportantforplantgrowth ,e .g .,physicalconditionofsoil,nutri ents,temperature ,plantpathogens ,etc .,arechang ingallthetime .Alargegenepoolavailableisessen tialforplantimprov… 相似文献
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为研究空间环境处理对水稻生长发育的影响,筛选有益的突变体,在神舟三号飞船上搭载10个不同熟期水稻品种的干种子.种子返地后栽培,考察发芽率、分蘖数和抽穗期等性状,并进行显著性分析.结果表明空间环境对不同基因型品种的分蘖有刺激和抑制两种效应,不同熟期的品种抽穗期变化的方向与基因型有关.空间处理M1代亦出现5株株高变高的个体,其生物学性状与对照有明显差异. 相似文献
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抗稻瘟病新基因pi-hit-1的克隆与功能研究 总被引:3,自引:0,他引:3
采用差异显示法(DD-PCR)寻找易感稻瘟病的突变品系与野生型对照品系中的差异表达基因。结果发现与野生型对照相比,Rubisco小亚基、pi-hit.1(AF450251)和pi-hit-2(AF448491)基因在易感稻瘟病的突变品系中高表达,pi-hit-1和pi-hit-2是功能未知的新基因。进一步采用电子克隆和RT-PCR方法克隆了pi-hit-1基因的全长eDNA(AF514859),该基因编码的蛋白质属于ATP依赖的Clp蛋白酶家族。分析pi-hit-1基因的组织特异性表达发现,此基因在叶片组织特异表达。进一步设计接种诱导实验研究pi-hit-1基因表达与水稻稻瘟病易感性的关系。在易感稻瘟病的突变品系中pi-hit-1受稻瘟病菌诱导,接种后其表达量明显升高,而野生型对照品系pi-hit-1基因表达在接种前后无明显变化。比较易感稻瘟病的突变品系与对照品系pi-hit-1基因序列差异发现,稻瘟病敏感品系中pi-hit-1基因第一外显子发生缺失突变使pi-hit-1蛋白功能缺失,导致突变品系易感稻瘟病。这些实验结果提示野生型pi-hit-1是稻瘟病抗性基因。 相似文献
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For exploring the biological effect of space environment on different genotype of rice seeds, the cytological effects of M1 generation after space flight were studied. Twelve different genotypes of rice seeds which belong to different climate ecotype (early, medium and late) of indica and japonica were onboard "Shenzhou 4" spaceship for 162 h. After recovered the total number of mitosis cells and chromosomal aberration were observed. In all the lines the mitotic index (MIs) of space flight are much higher than control, which indicates the stimulate effect of space environment. The cell rate of chromosomal aberration (CRCA) of space flight is also much higher than control, but varies from line to line. It indicates that biological effect of space environment on rice seed dependents not only on flight duration but also on rice genotype. The radiosensitivities of different lines were also discussed according to CRCAs. 相似文献
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DNA分子计算机研究现状 总被引:1,自引:0,他引:1
DNA分子计算机以其高并行性、大存储量、低能耗、抗干扰等特点成为未来新一代计算机的候选之一,简述了DNA分子计算机的原理,对Adleman的DNA分子计算模型和Shapiro等的DNA分子图灵机模型进行了综述,并对生物计算机的未来发展进行了展望。 相似文献
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为研究空间环境处理对水稻生长发育的影响,筛选有益的突变体,在神舟三号飞船上搭载10个不同熟期水稻品种的干种子,种子返地后栽培,考察发芽率、分蘖数和抽穗期等性状,并进行显著性分析,结果表明空间环境对不同基因型品种的分蘖有刺激和抑制两种效应,不同熟期的品种抽穗期变化的方向与基因型有关。空间处理M_1代亦出现5株株高变高的个体,其生物学性状与对照有明显差异。 相似文献
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