检索结果-南通市图书馆

Characterization and fine mapping of the rice blast resistance gene Pia

Science China(Life Sciences) 2011年第4期54卷 372-378页

作者： ZENG XiaoShan YANG XianFeng ZHAO ZhengHong LIN Fei WANG Ling pan qinghua Laboratory of Plant Resistance and Genetics College of Natural Resources and Environment Sciences South China Agricultural University Guangzhou 510642 China Hunan Agricultural University Changsha 410128 China

Blast, caused by Magnaporthe oryzae, is one of the most widespread and destructive diseases of rice. Breeding durable resistant cultivars （cvs） can be achieved by pyramiding of various resistance （R） genes. Pia, carded by cv. Aichi Asahi, was evaluated against 612 isolates of M. oryzae collected from 10 Chinese provinces. The Pia gene expresses weak resistance in all the provinces except for Jiangsu. Genomic position-ready marker-based linkage analysis was carded out in a mapping population consisting of 800 F2 plants derived from a cross of Aichi Asahi×Kasalath. The locus was defined in an interval of approximately 90 kb, flanked by markers A16 and A21. Four candidate genes （Pia-1, Pia-2, Pia-3, and Pia-4）, all having the R gene conserved structure, were predicted in the interval using the cv. Nipponbare genomic sequence. Four candidate resistance gene （CRG） markers （A17, A25, A26, and A27）, derived from the four candidates, were subjected to genotyping with the recombinants detected at the flanking markers. The first three markers completely co-segregated with the Pia locus, and the fourth was absent in the Aichi Asahi genome and disordered with the Pia locus and its flanking markers, indicating that the fourth candidate gene, Pia-4, could be excluded. Co-segregation marker-based genotyping of the three sets of differentials with known R gene genotypes revealed that the genotype of A26 （Pia-3） perfectly matched the R gene genotype of Pia, indicating that Pia-3 is the strongest candidate gene for Pia.

关键词： rice blast resistance gene Pia t'me mapping genotype

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Simulation of phase transition process using lattice Boltzmann method

引用

Chinese Science Bulletin 2009年第24期54卷 4596-4603页

作者： ZENG JianBang LI LongJian LIAO Quan CUI WenZhi CHEN qinghua pan LiangMing School of Power Engineering Chongqing University Chongqing 400030 China

A new lattice Boltzmann model based on SC model, is proposed to describe the liquid-vapor phase transitions. The new model is validated through the simulation of the one-component phase transition process. Compared with the simulation results of van der Waals gas and the Maxwell equal-area construction, the results of the new model have a better agreement with the analytical solutions than those of SC and Zhang models. Since the obtained temperature range and the maximum density ratio in this model are expanded, and the magnitude of maximum spurious current is only between those of SC and Zhang models, it is believed that this new model has better stability than SC and Zhang models. Consequently, the application scope of this new model is expanded compared with the existing phase transition models. According to the principle of the corresponding states in engineering thermodynamics, the simulations of ammonia and water phase transition process were implemented using this new model with different equations of state. Compared with the experimental data of ammonia and water, the results show that the Peng-Robinson is the best equation of state to describe the phase transition process of ammonia and water. Especially, the simulation results of ammonia with Peng-Robinson equation of state have an excellent agreement with its experimental data. Therefore these simulation results have a significant influence on the real engineering applications.

关键词：数值模拟相变过程格子玻尔兹曼方法格子Boltzmann模型工程热力学状态方程实验数据范德华气体

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The effect of the rice blast resistance gene Pi36 on the expression of disease resistance-related genes

引用

Chinese Science Bulletin 2010年第18期55卷 1881-1888页

作者： LIU XinQiong LI YuanYuan WANG LiYuan LIU XueQun WANG ChunTai WANG Ling pan qinghua Key Biotechnology Laboratory of State Ethnic Affairs Commission College of Life Science South-Central University for Nationalities Wuhan 430074 China Laboratory of Plant Resistance and Genetics College of Resources and Environmental Sciences South China Agricultural University Guangzhou 510642 China

The resistance gene Pi36 confers a stable and high level of resistance against Chinese isolates of the rice blast pathogen Mag-naporthe *** real time RT-PCR was used to investigate the expression profiles of various resistance-related genes in both the Pi36/AvPi36 incompatible *** 17 members of the OsMAPK family,OsMAPK2,OsMAPK4,OsMAPK8 and OsMAPK15 were differentially expressed,as were OsWRKY30,OsWRKY32,OsWRKY64 and OsWRKY67 among the 13 OsWRKY members *** induction of the expression of genes from both of these families suggests that both the JA and SA pathways are involved in Pi36-mediated *** genes differentially expressed included the OsbZIP transcription factors,OsNIF1 and OsNIF2,and the NPR1 homologue OsNH2,all of which were reported in the rice blast *** in-volvement of these genes illustrates the complexity of the downstream signalling pathways involved in the Pi36/AvrPi36 interaction.

关键词：抗病相关基因水稻稻瘟病抗稻瘟病基因基因差异表达 NPR1基因 PCR技术抗性基因稻瘟病菌

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Identification of the novel recessive gene pi55(t) conferring resistance to Magnaporthe oryzae

引用

Science China(Life Sciences) 2012年第2期55卷 141-149页

作者： HE XiuYing LIU XinQiong WANG Li WANGLing LIN Fei CHENG YongSheng CHEN ZhaoMing LIAO YaoPing pan qinghua State Key Laboratory of Conservation and Utilization of Subtropical Agro-bioresources Laboratory of Plant Resistance and GeneticsCollege of Natural Resources and Environment SciencesSouth China Agricultural UniversityGuangzhou 510642China Rice Research Institute Guangdong Academy of Agricultural SciencesGuangzhou 510640China Key Biotechnology Laboratory of State Ethnic Affairs CommissionCollege of Life ScienceSouth-Central University for NationalitiesWuhan 43074China

The elite rice cultivar Yuejingsimiao 2 （YJ2） is characterized by a high level of grain quality and yield, and resistance against Magnaporthe oryzae. YJ2 showed 100% resistance to four fungal populations collected from Guangdong, Sichuan, Liaoning, and Heilongjiang Provinces, which is a higher frequency than that shown by the well-known resistance （R） gene donor culti- vats such as Sanhuangzhan 2 and 28zhan. Segregation analysis for resistance with F2 and F4 populations indicated the re- sistance of YJ2 was controlled by multiple genes that are dominant or recessive. The putative R genes of YJ2 were roughly tagged by SSR markers, located on chromosomes 2, 6, 8, and 12, in a hulked-segregant analysis using genome-wide selected SSR markers with F4 lines that segregated into 3 resistant （R）： 1 susceptible （S） or 1R：3S. The recessive R gene on chromosome 8 was further mapped to an interval ~1.9 cM/152 kb in length by linkage analysis with genomic position-ready markers in the mapping population derived from an F4 line that segregated into 1R：3S. Given that no major R gene was mapped to this inter- val, the novel R gene was designated as pi55（t）. Out of 26 candidate genes predicted in the region based on the reference genomic sequence of the cultivar Nipponbare, two genes that encode a leucine-rich repeat-containing protein and heavy-metalassociated domain-containing protein, respectively, were suggested as the most likely candidates for pi55（t）.

关键词： rice blast recessive resistance gene pi55 resistance inheritance gene mapping

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

在都江堰灾后重建实施规划中践行“全程规划”

引用

城市规划 2010年第7期34卷 83-86页

作者：潘庆华成都市规划设计研究院

结合都江堰灾后重建实施规划平台,对现有规划编制框架进行了探索式的调整和重构,扩充了城市规划编制的外延,延伸了相关工作链条,强化了城市规划工作的民意化、政策化、法制化以及实施的市场化。

关键词：全程规划公众参与协商滚动实施

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Crystalline behaviors and phase transition during the manufacture of fine denier PA6 fibers

引用

Science China Chemistry 2009年第11期52卷 1835-1842页

作者： ZHANG ChengFeng LIU YuHai LIU ShaoXuan LI HuiZhen HUANG Kun pan qinghua HUA XiaoHui HAO ChaoWei MA QingFang LV ChangYou LI WeiHong YANG ZhanLan ZHAO Ying WANG DuJin LAI GuoQiao JIANG JianXiong XU YiZhuang WU JinGuang Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Engineering PlasticsJoint Laboratory for Polymer Science and MaterialsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Key Laboratory of Organosilicon Chemistry and Material Technology Ministry of Education Hangzhou Normal UniversityHang-zhou 310012China College of Chemistry and Environmental Science Henan Normal UniversityXinxiang 453007China Graduate University of Chinese Academy of Sciences Beijing 100190China

Recently we have successfully produced fine denier PA6 fibers by using additives containing lanthanide ***,crystallization and phase transition of PA6 fibers during spinning and drawing processes were *** the spinning process,β phase crystal could be obtained in as-spun PA6 fibers which were produced with relatively high melt draw ratio,while γ phase crystal predominated when the melt draw ratio was relatively low.β phase crystal,whose behaviors are similar with those of γ phase by FT-IR and XRD characterization,could be transformed to α form easily when PA6 fibers are immersed in boiling ***,γ phase crystal of PA6 remains unchanged in boiling ***,β and γ phase crystals of PA6 can be differentiated by the crystalline behaviors of PA6 fibers after treatment in boiling *** experiments demonstrate that the β phase can also be produced during a drawing process where a phase transformation from γ to α *** other words,β phase may act as an intermediate state during the phase transformation.

关键词： nylon 6 fiber crystallization FT-IR XRD

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

旧城改造中的公众参与探索与思考——以成都市中心城区北部片区改造工程为例

引用

规划师 2013年第B8期29卷 54-57页

作者：潘庆华成都市规划设计研究院五所

公众参与引入旧城改造是必然趋势,研究以公众参与的理论为基础,以成都市中心城区北部片区改造工程中的典型案例为研究对象,对公众参与行为进行分析,得出开展公众参与及其对规划设计的相关启示。

关键词：公众参与案例分析启示

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于机会约束规划的机会阵雷达功率资源管理算法

引用

系统工程与电子技术 2017年第3期39卷 506-513页

作者：韩清华潘明海龙伟军南京航空航天大学电子信息工程学院江苏南京211106 南京电子技术研究所江苏南京210039

研究了在进行多目标跟踪时机会数字阵列雷达(opportunistic digital array radar,ODAR)的功率资源管理问题。针对复杂多变的环境和未知的目标信息所导致的不确定性,建立了基于随机和模糊机会约束规划(chance-constraint programming,CCP... 详细信息

研究了在进行多目标跟踪时机会数字阵列雷达(opportunistic digital array radar,ODAR)的功率资源管理问题。针对复杂多变的环境和未知的目标信息所导致的不确定性,建立了基于随机和模糊机会约束规划(chance-constraint programming,CCP)的多目标稳健功率资源管理模型。模型引入随机变量表征雷达总发射功率,引入模糊变量表征每个目标的RCS,以贝叶斯克拉美罗界(Bayesian Cramer Rao lower bound,BCRLB)作为目标跟踪精度的衡量标准,将随机模拟和模糊模拟都嵌入到遗传算法(genetic algorithm,GA)当中,从而预测出下一时刻满足给定置信水平的各目标最优的功率分配,然后根据求解出来的功率分配情况,利用无迹卡尔曼滤波器(unscented Kalman filter,UKF)进行目标跟踪。最后,通过仿真实验验证了算法的有效性和稳定性。

关键词：机会数字阵列雷达机会约束规划功率资源管理贝叶斯克拉美罗界随机模拟模糊模拟

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

风能聚集原理——关于高效风能系统的一种设想

引用

空气动力学学报 1984年第3期 52-60页

作者：潘文全清华大学

为增强通过风力透平的能量密度,本文提出了一种可以高度聚集风能的系统,并对此系统进行了理论分析,给出了各种工况条件下的风能最佳提取率,并得到了风能名义利用系数的理论极值和实际极值。理论分析和实验研究表明,本系统的风能最佳提... 详细信息

为增强通过风力透平的能量密度,本文提出了一种可以高度聚集风能的系统,并对此系统进行了理论分析,给出了各种工况条件下的风能最佳提取率,并得到了风能名义利用系数的理论极值和实际极值。理论分析和实验研究表明,本系统的风能最佳提取率与自然风的驻点状态、系统的出口压力及空气的绝热指数有关。本系统的风能名义利用系数的理论极大值和实际极大值都可以超过常规风能系统的理论极大值数倍乃至十数倍。结论是;本系统将可能成数倍乃至十数倍地提高同等尺寸透平的输出功率。

关键词：风能名义利用系数气候资源扩压段透平涡轮极大值

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

焊接空心球节点的拉压极限承载力分析

引用

土木工程学报 2003年第10期36卷 1-6页

作者：韩庆华潘延东刘锡良天津大学

采用三维退化曲壳有限元对焊接空心球节点的极限承载力进行了计算。推导了其切线刚度矩阵和弹塑性矩阵,采用多线性等向强化模型和Von-Mises屈服准则,在对6组受拉节点和6组受压节点的试验结果进行了数值模拟的基础上,提出了适于有限元分... 详细信息

采用三维退化曲壳有限元对焊接空心球节点的极限承载力进行了计算。推导了其切线刚度矩阵和弹塑性矩阵,采用多线性等向强化模型和Von-Mises屈服准则,在对6组受拉节点和6组受压节点的试验结果进行了数值模拟的基础上,提出了适于有限元分析的强度破坏准则和极限准则;采用柱面弧长子增量技术,跟踪了节点在轴向荷载作用下的荷载-位移曲线。通过计算发现,焊接空心球节点在轴向受拉荷载作用下为强度破坏,而在轴向受压荷载作用下为弹塑性压曲破坏,两者均与钢材的设计强度有关。最后,在对32组受拉节点和32组受压节点承载力回归分析的基础上,提出了球外径适用范围为160～900mm的焊接空心球节点承载力计算公式。

关键词：焊接空心球节点极限承载力数值模拟有限元弹塑性

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：