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甘薯茎线虫病抗侵入和抗扩展资源评价 被引量:11
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作者 谢逸萍 王欣 +1 位作者 李洪民 孙厚俊 《植物遗传资源学报》 CAS CSCD 北大核心 2009年第1期136-139,共4页
对69份创新种质和具有200个单株的RAPD分析分离群体进行甘薯茎线虫病抗侵入和抗扩展鉴定,结果表明:可作为抗性亲本的材料仅占创新种质的23.2%,福薯13为高抗侵入和高抗扩展特异资源,泉紫薯1号、烟紫薯176、徐01-2-5、徐01-25-8具有高抗... 对69份创新种质和具有200个单株的RAPD分析分离群体进行甘薯茎线虫病抗侵入和抗扩展鉴定,结果表明:可作为抗性亲本的材料仅占创新种质的23.2%,福薯13为高抗侵入和高抗扩展特异资源,泉紫薯1号、烟紫薯176、徐01-2-5、徐01-25-8具有高抗侵入、抗扩展特性,可作为双抗亲本加以利用。另对甘薯茎线虫病抗扩展性鉴定方法的研究表明:采用室内接种200条线虫,25℃室温下培养45d,以薯块的横切和纵切面的平均防效进行评价最为有效。 展开更多
关键词 甘薯 茎线虫病 抗侵入 扩展
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卫星通信抗侵入关键技术研究
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作者 李晨 《移动信息》 2018年第2期40-41,47,共3页
随着社会经济的不断发展,卫星通信技术越来越完善,卫星通信技术为人们的生活带来了极大的便利,加强了人与人之间的沟通交流,并且对于维护国家安全,保证社会正常生活秩序具有重要的作用,但是卫星通信总是受到多方面的干扰,对卫星通信的... 随着社会经济的不断发展,卫星通信技术越来越完善,卫星通信技术为人们的生活带来了极大的便利,加强了人与人之间的沟通交流,并且对于维护国家安全,保证社会正常生活秩序具有重要的作用,但是卫星通信总是受到多方面的干扰,对卫星通信的抗侵入技术进行分析能够有效保证卫星通信的安全。 展开更多
关键词 卫星通信 抗侵入 技术分析
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一种同时评价小麦抗赤霉病侵入和扩展的策略 被引量:3
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作者 薛树林 安霞 +6 位作者 李国强 许峰 汪瑶 唐明智 贾海燕 孔忠新 马正强 《分子植物育种》 CAS CSCD 2010年第3期478-482,共5页
抗侵入(typeⅠ)和抗扩展(typeⅡ)是小麦对赤霉病抗性的两种主要类型,其抗性机制迥异,接种方法和抗性鉴定指标也完全不同。为了建立一种同时评价这两种抗性的策略,本研究以喷雾接种后14d和21d的病小穗数(NDS14和NDS21)以及这两种数据的差... 抗侵入(typeⅠ)和抗扩展(typeⅡ)是小麦对赤霉病抗性的两种主要类型,其抗性机制迥异,接种方法和抗性鉴定指标也完全不同。为了建立一种同时评价这两种抗性的策略,本研究以喷雾接种后14d和21d的病小穗数(NDS14和NDS21)以及这两种数据的差值(DNDS)作为抗性鉴定指标。利用从南大2419×望水白重组自交系群体中所获得表型数据进行QTL定位,结果表明,NDS14主要反映抗侵入性,DNDS主要反映抗扩展性,这说明在同一试验中同时评价抗赤霉病侵入和扩展这两种抗性是可行的。与分别进行这两种抗性鉴定的方法相比,本研究所提出的策略所需资源更少、更省时省力,可广泛用于小麦抗赤霉病育种以及抗性遗传分析的研究。 展开更多
关键词 赤霉病 抗侵入 扩展 性鉴定指标
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甘薯茎线虫病抗性鉴定方法及评价 被引量:36
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作者 谢逸萍 马代夫 +3 位作者 李洪民 李秀英 李强 马飞 《杂粮作物》 CAS 2002年第1期50-51,共2页
对甘薯茎线虫病〔Ditylenchusdipsaci(K櫣hn)Filipjev〕抗性鉴定方法 :病地自然诱发鉴定法、薯片接种线虫钌红染色鉴定法、室内人工接种鉴定法进了系统介绍和客观评价 ,并对甘薯品种抗甘薯茎线虫病侵入和扩展特性进行评述 。
关键词 甘薯 茎线虫病 抗侵入 扩展 鉴定模式 性鉴定 病育种
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小麦对赤霉病高抗或免疫类型的形态特征和反应型划分的探讨 被引量:2
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作者 余毓君 《华中农业大学学报》 CAS CSCD 北大核心 1989年第3期195-200,共6页
以(崇阳红麦×恩鄂一号)幼胚培养获得的再生植株(第二代)为材料,通过接种鉴定,获得了对赤霉病抗侵入和高度抗扩展类型的植株。抗侵入类型的表现是接种小花不发病或出现过敏性坏死而小花脱落。高度抗扩展类型的表现是仅接种小花病而... 以(崇阳红麦×恩鄂一号)幼胚培养获得的再生植株(第二代)为材料,通过接种鉴定,获得了对赤霉病抗侵入和高度抗扩展类型的植株。抗侵入类型的表现是接种小花不发病或出现过敏性坏死而小花脱落。高度抗扩展类型的表现是仅接种小花病而不扩展至相邻的同小穗小花。这就为抗赤霉病育种提供了形态特征和有关遗传信息,根据试验结果,对抗侵入的概念、反应级划分抗赤霉病育种目标及组织培养可作为创造新抗源的有效诱变因素等方面进行了讨论。 展开更多
关键词 小麦 赤霉病 反应型 抗侵入
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不同抗性甘薯品种在茎线虫病区的田间表现 被引量:6
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作者 张勇跃 刘志坚 +4 位作者 孟凡奇 秦素研 丁华锋 张云杰 王清 《安徽农业科学》 CAS 2019年第7期161-162,170,共3页
通过连续2年在不同地点的试验可知,漯薯11和漯薯10号2个品种鲜薯平均产量高且稳产性好,对茎线虫病抗侵入性表现为高抗和抗,可以在北方薯区大面积推广应用。漯徐薯9号和商薯19这2个品种虽然鲜薯平均产量也较高,但对茎线虫病抗侵入性表现... 通过连续2年在不同地点的试验可知,漯薯11和漯薯10号2个品种鲜薯平均产量高且稳产性好,对茎线虫病抗侵入性表现为高抗和抗,可以在北方薯区大面积推广应用。漯徐薯9号和商薯19这2个品种虽然鲜薯平均产量也较高,但对茎线虫病抗侵入性表现为感或高感,在推广应用中要注意防治茎线虫病,不宜在茎线虫病发生区推广种植。 展开更多
关键词 甘薯 品种 茎线虫病 抗侵入 防治
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混凝土抗侵蚀防腐剂性能研究 被引量:7
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作者 丁小富 李长成 +1 位作者 赵顺增 刘立 《低温建筑技术》 2020年第7期59-61,73,共4页
采用工业废渣、活性激发组分及阻锈组分制备混凝土抗侵蚀防腐剂,以中、高抗硫酸盐水泥为对比样,研究了混凝土抗侵蚀防腐剂的化学组成、力学性能与耐蚀性能。结果表明,混凝土抗侵蚀防腐剂的抗蚀性能介于中、高抗硫酸盐水泥之间,可以显著... 采用工业废渣、活性激发组分及阻锈组分制备混凝土抗侵蚀防腐剂,以中、高抗硫酸盐水泥为对比样,研究了混凝土抗侵蚀防腐剂的化学组成、力学性能与耐蚀性能。结果表明,混凝土抗侵蚀防腐剂的抗蚀性能介于中、高抗硫酸盐水泥之间,可以显著提高混凝土的密实性与抗侵入性,具有良好的抗盐类侵蚀功能。氯离子含量仅为0.03%,28d抗压强度比104%,28d膨胀率0.38%,抗蚀系数1.12,膨胀系数1.10,氯离子扩散系数比0.56。 展开更多
关键词 混凝土侵蚀防腐剂 蚀系数 氯离子扩散系数比 密实性 抗侵入
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丙烯酸脂共聚乳液在子牙河入海口16孔闸加固中的应用 被引量:1
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作者 李桂波 崔宏才 韩金周 《河北工程技术高等专科学校学报》 2002年第4期30-32,共3页
丙烯酸脂共聚乳液 (简称丙乳 )属于一种新型的科技含量较高的施工材料 ,具有优异的粘结、抗裂、抗冻、防渗、防腐等性能。在子牙河入海口 16孔闸加固工程中 ,采用了丙乳净浆、丙乳砂浆和丙乳豆石砼分别对闸门进了防腐和修补处理 ,一次... 丙烯酸脂共聚乳液 (简称丙乳 )属于一种新型的科技含量较高的施工材料 ,具有优异的粘结、抗裂、抗冻、防渗、防腐等性能。在子牙河入海口 16孔闸加固工程中 ,采用了丙乳净浆、丙乳砂浆和丙乳豆石砼分别对闸门进了防腐和修补处理 ,一次施工面积达 12 36 .5 m2 ,施工实践表明 ,丙乳及丙乳砂浆丙乳豆石砼施工性能优良 ,施工技术简单、效果好 。 展开更多
关键词 加固 丙烯酸脂共聚乳液 钢筋混凝土结构 粘结 防腐 防渗 氯离子侵入 闸门 水闸
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含有煅烧粘土的混凝土之耐久性
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作者 RachelJ.Detwiler 许贤敏 龚丹丹 《港工技术与管理》 2003年第6期42-46,共5页
在混凝土中掺入20%~30%煅烧粘土,可提高混凝土抗氯离子侵入的能力,而且在控制由碱——硅反应引起混凝土的膨胀和裂缝方面也是有效的。本文介绍了国外科学家在这方面的研究成果。
关键词 煅烧粘土 混凝土 耐久性 碱-硅反应 氯离子侵入 裂缝
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Particle swarm optimization and its application to seismic inversion of igneous rocks 被引量:4
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作者 Yang Haijun Xu Yongzhong +6 位作者 Peng Gengxin Yu Guiping Chen Meng Duan Wensheng Zhu Yongfeng Cui Yongfu Wang Xingjun 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2017年第2期349-357,共9页
In order to improve the fine structure inversion ability of igneous rocks for the exploration of underlying strata, based on particle swarm optimization(PSO), we have developed a method for seismic wave impedance inve... In order to improve the fine structure inversion ability of igneous rocks for the exploration of underlying strata, based on particle swarm optimization(PSO), we have developed a method for seismic wave impedance inversion. Through numerical simulation, we tested the effects of different algorithm parameters and different model parameterization methods on PSO wave impedance inversion, and analyzed the characteristics of PSO method. Under the conclusions drawn from numerical simulation, we propose the scheme of combining a cross-moving strategy based on a divided block model and high-frequency filtering technology for PSO inversion. By analyzing the inversion results of a wedge model of a pitchout coal seam and a coal coking model with igneous rock intrusion, we discuss the vertical and horizontal resolution, stability and reliability of PSO inversion. Based on the actual seismic and logging data from an igneous area, by taking a seismic profile through wells as an example, we discuss the characteristics of three inversion methods, including model-based wave impedance inversion, multi-attribute seismic inversion based on probabilistic neural network(PNN) and wave impedance inversion based on PSO.And we draw the conclusion that the inversion based on PSO method has a better result for this igneous area. 展开更多
关键词 Particle swarm optimization Seismic inversion Igneous rocks Probabilistic neutral network Model-based inversion
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Relative abundance of invasive plants more effectively explains the response of wetland communities to different invasion degrees than phylogenetic evenness 被引量:3
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作者 Kai Sun Xuan-Shao Liu +5 位作者 Tian-Jian Qin Fan Jiang Jing-Fang Cai Yi-Luan Shen Si-Ha A Hong-Li Li 《Journal of Plant Ecology》 SCIE CSCD 2022年第3期625-638,共14页
Native plant communities are commonly invaded by invasive plants to different degrees.However,the relative contribution of the invasive plant abundance vs.phylogenetic evenness to the responses of wetland communities ... Native plant communities are commonly invaded by invasive plants to different degrees.However,the relative contribution of the invasive plant abundance vs.phylogenetic evenness to the responses of wetland communities to different degrees of invasion is still unclear.In addition,whether such contribution varies with environmental conditions such as flooding is also unclear.To address these questions,we chose Alternanthera philoxeroides as the invasive plant,and set up four invasive degrees by changing the community species composition under both flooding and non-flooding conditions.The relative abundance of A.philoxeroides and phylogenetic evenness changed simultaneously with the change in the community invasion degree.The invasion degree significantly affected the individual biomass of A.philoxeroides and some native species.Variation partitioning showed that the relative abundance of A.philoxeroides contributed more to variation in community indicators than phylogenetic evenness,regardless of flooding.Spearman rank correlation test showed that the relative abundance of A.philoxeroides was negatively correlated with the individual biomass of A.philoxeroides and some native species,while the phylogenetic evenness was positively correlated with only a few native species.And their correlation strength and significance were all affected by specific species and flooded environment.In conclusion,our results suggest that the relative abundance of A.philoxeroides can more effectively explain the wetland community response to different invasion degrees than phylogenetic evenness,regardless of flooding. 展开更多
关键词 biotic resistance habitat effect invasion process invasion level PHYLOGENY
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Antioxidative Responses and Metal Accumulation in Invasive Plant Species Growing on Mine Tailings in Zanjan, Iran 被引量:1
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作者 M.M.A.BOOJAR Z.TAVAKKOLI 《Pedosphere》 SCIE CAS CSCD 2011年第6期802-812,共11页
Tailings of a Pb and Zn mine as a metal-contaminated area (Zone 1) with two pioneer plant species, Peganum harmala and Zygophyllum fabago, were investigated and compared with a non-contaminated area (Zone 2) in th... Tailings of a Pb and Zn mine as a metal-contaminated area (Zone 1) with two pioneer plant species, Peganum harmala and Zygophyllum fabago, were investigated and compared with a non-contaminated area (Zone 2) in the vicinity. Total concentrations of Pb, Zn, and Cu in the soil of Zone 1 were 1 416, 2 217, and 426 mg kg-1, respectively, and all exceeded their ranges in the normal soils. The soil pH was in the neutral range and most of the physical and chemical characteristics of the soils from both zones were almost similar. The species Z. fabago accumulated higher Cu and Zn in its aerial part and roots than the normal plants. On the other hand, their concentrations did not reach the criteria that the species could be considered as a metal hyperaccumulator. The species P. harmala did not absorb metals in its roots; accordingly, the accumulation factor values of these metals were lower than 1. The contents of chlorophyll, biomass, malondialdehyde, and dityrosine in these two species did not vary significantly between the two zones studied. In Zone 1, leaf vacuoles of Z. fabago stored 35.6% and 43.2% of the total leaf Cu and Zn, respectively. However, in this species, the levels of phytochelatins (PCs) and glutathione (GSH) and antioxidant enzyme activities were significantly higher in Zone 1 than in Zone 2. In conclusion, metal exclusion in P. harmala and metal accumulation in Z. fabago were the basic strategies in the two studied pioneer species growing on the metal-contaminated zone. In response to metal stress, elevation in antioxidant enzyme activities, increases in the PCs and GSH levels in the aerial parts, and metal storage within vacuoles counteracted each other in the invasion mechanism of Z. ]abago. 展开更多
关键词 accumulation factor antioxidant enzymes GLUTATHIONE metal stress PHYTOCHELATINS
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