2019—2020年苏浙皖三省小麦叶锈菌群体的致病类型鉴定及毒性结构分析     

李泓甫  华为  朱靖环  高利  陈万权  刘太国 《植物保护学报》2023,50(3):705-715

为持续控制小麦叶锈病及促进小麦的抗叶锈病育种工作,2019—2020年自江苏、浙江和安徽3个省采集自然感叶锈病的小麦病叶,经分离获得小麦叶锈菌单孢分离物,利用43个小麦叶锈病鉴别寄主材料对其致病类型进行鉴定,并对其毒性结构进行分析。结果显示,从170份小麦叶锈菌单孢分离物中共鉴定出67个致病类型,主要致病类型为THS、SHJ、PHS和SHS,出现频率分别为8.8%、7.6%、5.9%和5.9%。江苏、浙江和安徽3个省的单孢分离物对携带抗叶锈基因Lr10、Lr12、Lr22a、Lr22b、Lr29、Lr33、Lr35和Lr36的鉴别寄主材料的苗期毒性频率均超过90.0%,而对携带抗叶锈基因Lr9、Lr24、Lr25、Lr28、Lr38、Lr40、Lr41、Lr42、Lr43和Lr13+3ka的鉴别寄主材料的苗期毒性频率均小于10.0%。卡方检验及Fisher精确检验显示,3个省小麦叶锈菌群体对抗叶锈基因Lr1、Lr2a、Lr3、Lr14b、Lr18、Lr21、Lr26、Lr27+31、Lr32和Lr37的毒力存在显著分化。浙江省小麦叶锈菌群体具有较少的毒性因子（4.73）和毒性值（600...  相似文献   

Metabolic responses of tea (Camellia sinensis L.) to the insecticide thiamethoxam     

Weiting Jiao  Ping Zhang  Chuanjian Cui  Min Yan  Qing X. Li  Yongfeng Tang  Nan Zhang  Xinyi Wang  Ruyan Hou  Rimao Hua 《Pest management science》2023,79(10):3570-3580

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灵芝孢子受冷等静高压作用破壁提取机理的探讨     

吴华  张守勤  朱俊洁  王长征 《农机化研究》2005,(6):89-91

按照普通植物种子的情况,推定灵芝孢子的结构有完全充满、部分充满、有大空隙和无种仁4种形式。为此,按照这4种形式分别说明了灵芝孢子受高等静压作用时,孢子壁的破坏方式和灵芝孢子有效成分的溶出方式。  相似文献   

凉山州高原粳稻开花习性研究   总被引：1，自引：0，他引：1  

戴红燕  华劲松  蔡光泽  郑传刚 《种子》2006,25(6):14-17,20

凉山州高原粳稻在自然环境中抽穗后3～4d开始开花，5～8d进入开花盛期，10～12d相继结束；1日内的开花时间主要集中在12：00～16：00；每朵颍花开花历时60～110min不等；闭花授粉粒和停止发育粒教因品种而异；水稻开花与颖壳内湿度、田间温度和生态区关系密切。  相似文献   

INTERCONNERCTION BETWEEN SUPER-MINICOMPUTER ETHERNT E     

Li Hua Wu Zhongfu Chen Dazhi 《保鲜与加工》1989,(2):35-42

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Analysis on Knowledge Sharing Under the Incomplete Information Condition     

ZHAO Hua~ 《保鲜与加工》2006,(4):133-136

Knowledge sharing is the important way in which enterprises create organizational knowledge and obtain competition advantage.Scholars always have difference viewpoints about the motivators in knowledge sharing.This paper(analyzes) the incomplete information game and the choice of the motivators in knowledge sharing.If the knowledge(acceptant) offers motivators to the knowledge owner,knowledge sharing might make the participants obtain knowledge-sharing incomes.If knowledge-sharing incomes can make up the participants' costs,knowledge sharing can be caught through.Because the information of knowledge's value is incomplete,enterprises need knowledge managers and organizational additional motivators promote knowledge sharing.  相似文献   

Vibration Analysis and System Simulation for a Stalled Wind Turbine     

HE Jing  HE Yu-lin  JIN Xin  LIU Hua 《保鲜与加工》2007,(5):91-95

The aerodynamic characteristic of wind turbine is calculated by applying the Blade Element Momentum(BEM) theory.Also finite element mode analysis is done for the tower and the rotor.Then the multi-dynamic model of the wind turbine is built in Adams.Also the drive chain is calculated by applying state space method and programmed in Matlab/ Simulink.With that the combined simulation of vibration characteristics is carried out on the base of MATLAB/Simulink and ADAMS,in which the transmission effects and aero-elasticity coupling is fully considered.The results show that the method is able to simulate the vibration characteristic almost the same as software Bladed,which is well-known for analyzing performance and loads for the design and certification of wind turbines.  相似文献   

New Algorithms for Data Discretization Based on Rough Set Theory     

ZHAO Jun  WANG Guo_yin  WU Zhong_fu  LI Hua 《保鲜与加工》2002,(3):18-21

The discretization of real values is always one of the key problems to be solved in the domain of machine learning for its great contribution to speeding up the followed learning algorithms, cutting down the real demand of algorithms on running space and time, and improving the clustering capability of the ultimate learning results. The basic characteristics and framework of discretization approaches based on rough set model are analyzed at first, then the different measurements of the importance of candidate cuts are discussed and researched. Two new heuristic algorithms are put forward to finally select the useful cuts from a candidate set. The selected cuts of the two algorithms will adequately maintain the discernible relation of information systems for their full considering the specialty of rough set, which perfectly embodies the advantages of this theory. Moreover, excellent discretization results may be expected through these heuristic algorithms.  相似文献   

酿酒葡萄延迟栽培方式的研究   总被引：2，自引：0，他引：2  

房玉林  陈书霞  李华 《中国农学通报》2005,21(5):304-304

利用西昌地区丰富的光热资源，以3年生真芳德和梅尔诺为试材，2000年在西昌正大葡萄试验园进行了酿酒葡萄延迟栽培的研究。摘除一次花序，对新梢分别在花后20、40、60、80d进行中梢修剪，逼迫冬芽萌发结果。结果表明：真芳德具有较强的冬芽副梢结果能力。在延迟栽培条件下，两品种的果实成熟期可推迟到11月上中旬。单株产量、果实可溶性固形物含量和总糖的最大值均出现在花后60d的处理中；各处理滴定酸均高于对照；出汁率随处理时间延迟而降低。两品种花后40、60和80d处理的果实黑痘病和白腐病的发生均低于对照。冬芽副梢成熟度良好。结果表明，延迟栽培能够有效调节葡萄成熟期并改善原料质量，但同时也造成产量的下降和生产周期的加长。  相似文献   

单株幼龄苹果树修剪仿真研究     

杨丽丽  陈甲风  谢锐  华净  康孟珍  董乔雪 《农业机械学报》2015,46(S1):41-44

修剪是果树生产中重要的技术手段,要想研究更加合理的修剪技术体系,就必须保证能够对修剪反应有准确、直观和及时的判断,而仿真模拟技术提供了这种可能。以幼龄苹果树为研究对象,采用不同修剪处理对比的方法,在田间试验的基础上,总结修剪反应规律,构建苹果树结构和修剪模型。在此基础上基于Qt框架和OpenGL图形库,开发了单株苹果树修剪仿真软件平台。结合优化算法,通过仿真平台模拟了给定生产目标的修剪方案优化,优化结果对虚拟学习和实际生产提供了可视化指导。  相似文献