ISSR标记在辣椒资源遗传多态性分析中的初步应用

用筛选到的12个ISSR(InterSimpleSequenceRepeat)引物对我国11个辣椒农家品种进行扩增,结果共扩增出66条带,其中差异条带26条,多态条带比率(PPB)为39.39%;品种特异条带7条,占总条带数的10.61%.基于Jaccard遗传相似性系数的NeighborJoining聚类分析将11个品种分为两组,这两组辣椒品种内部的平均遗传距离分别为0.150和0.134,两组之间的遗传距离为0.194.以扩增条带表型为基础的主成分分析显示:有2个主成分累计贡献率为68.88%,分别占到57.51%和11.37%;以这2个主成分对11个辣椒品种作图,可以将11个辣椒品种分为两组,每组所含辣椒品种与聚类分析的结果相同.     

宿州辣椒地方品种分子遗传多样性分析

利用优化的辣椒SRAP—PCR反应体系,研究宿州辣椒地方品种的遗传多样性．从30个引物组合中筛选出条带清晰、多态性好的15个引物组合,共扩增出62条谱带．其中,多态性谱带有40条,多态率为64．5％;不同引物扩增的条带为3～7条,谱带大小范围为100～1000bp．供试品种的遗传相似系数为0．52～1．00之间,当遗传距离D=0．52时,可将27份材料分为两大类．结果表明,宿州辣椒种质资源遗传多样性丰富．     

河南产香茶菜属6种植物的RAPD分析

从70个随机引物中筛选出10个具有较高多态性检测能力的引物,用于RA PD扩增,共扩增出85个条带,其中多态性条带59条,占68.81%.对得出的结果用SPSS12.0进行聚类分析,结果表明:河南产香茶菜不同种、同一种的栽培和野生之间存在明显的遗传分化,其中种间的差异要大于种内.从DNA分子水平上探讨了香茶菜属6种植物之间的遗传关系,为中药材冬凌草的品种鉴别提供依据.     

银木和樟树遗传多样性与亲缘关系的RAPD分析

利用RAPD技术分析银木和樟树的遗传多样性与亲缘关系.用筛选出的12条引物从7株银木和7株樟树中共扩增得到91条DNA带,其中多态性条带48条,多态性条带比率为52.7%.根据Nei-Li方法进行的遗传相似性分析表明,银木植株间的遗传相似性系数在0.457～0.781,平均为0.564;樟树植株间的遗传相似性系数在0.646～0.862,平均为0.777;银木与樟树间的遗传相似性系数在0.318～0.531,平均为0.422.根据RAPD结果进行的聚类分析正确地将银木与樟树各聚为一类.这些数据说明银木植株间的遗传多样性大于樟树植株间的遗传多样性,银木与樟树之间的亲缘关系小于两种植物内部个体间的亲缘关系.     

坛紫菜种质资源遗传多样性的AFLP分析

利用AFLP技术从基因组DNA水平上分析福建省主要坛紫菜栽培品系和诱变筛选获得的突变品系的遗传差异,在25对引物中,有11对能得到重复性好的多态性扩增条带,总共在667个位点能扩增出条带,每对引物扩增带数为24~90条,并且各对引物扩增结果均显示样品间存在差异.共得到522条多态性条带,占总扩增带的78.3%.根据AFLP图谱计算了不同样品间的遗传距离(D)和相似性系数(GS).优良品系GL和CCS之间的遗传距离最小,仅为0.264,不同样品间的相似性系数介于0.602~0.736之间.并根据D值绘制了它们的UPGMA聚类图谱.     

怀地黄85-5品种内遗传多样性的RAPD和ISSR分析

采用CTAB法提取了怀地黄85-5品种16个单株的基因组DNA,使用紫外分析和琼脂糖凝胶电泳检测其纯度和大小,利用RAPD及ISSR分析其品种内遗传多样性.从24个RAPD引物和43个ISSR引物中分别筛选出具有稳定多态性条带的RAPD引物3个和ISSR引物2个,分别对16个单株基因组DNA进行PCR扩增.3个RAPD引物共扩增出7条带,其中多态性条带为4个,多态性比率为57.14%.2个ISSR引物共扩增出17条带,其中多态性条带为11个,多态性比率为64.7%.结果表明,怀地黄85-5品种内存在遗传差异,但遗传多样性比地黄品种间的低.     

藜豆种质资源遗传多样性的ISSR分子标记分析

利用ISSR标记构建了9份藜豆种质的指纹图谱,并对其遗传多样性进行评价。结果表明,从35条引物中筛选出8条重复性好的多态性引物进行PCR扩增,共扩增出64条带,其中多态性条带50条,多态性比例为78.1%。应用其中3条多态性ISSR引物(UBC889、UBC812、UBC825)的12条特异性条带,可以有效区分供试的9份藜豆种质资源。藜豆种质间的遗传相似系数变化范围在0.47⁰.97之间。利用UPGMA聚类分析,在相似性系数为0.73处可将9个藜豆种质资源划分为3个类群,其亲缘关系与种质地理来源之间存在一定关联性。     

大蒜种质资源遗传多样性的分子标记研究

本研究利用RAPD和ISSR两种分子标记技术,对中国10个不同地区的大蒜品种进行了种质资源遗传多样性研究.从30个RAPD引物当中,筛选出11个具有多态性的引物,共扩增出多态性带224条,多态性条带比率为41.18%,从12个ISSR引物中筛选出5个具多态性的ISSR引物,共扩增出多态性带121条,多态性条带比率为50.21%.对RAPD和ISSR两种标记分别运用Nei指数法,计算出10个大蒜品种的平均遗传距离为0.28和0.32.根据这两种标记的结果,采用UPGMA进行聚类分析,得到与生物学分类地位基本一致的结果.结果表明,在实验稳定性上,ISSR优于RAPD,且ISSR比RAPD能检测到更多的遗传变异,RAPD和ISSR两种标记可用于大蒜种质遗传多样性的研究.     

大蒜种质资源遗传多样性的分子标记研究

本研究利用RAPD和ISSR两种分子标记技术．对中国10个不同地区的大蒜品种进行了种质资源遗传多样性研究．从30个RAPD引物当中．筛选出11个具有多态性的引物．共扩增出多态性带224条．多态性条带比率为41．18％．从12个ISSR引物中筛选出5个具多态性的ISSR引物．共扩增出多态性带121条．多态性条带比率为50．21％．对RAPD和ISSR两种标记分别运用Nei指数法．计算出10个大蒜品种的平均遗传距离为0．28和0．32．根据这两种标记的结果．采用UPGMA进行聚类分析，得到与生物学分类地位基本一致的结果．结果表明，在实验稳定性上．ISSR优于RAPD．且ISSR比RAPD能检测到更多的遗传变异．RAPD和ISSR两种标记可用于大蒜种质遗传多样性的研究．     

利用ISSR技术对优质红锥种质资源遗传多样性的分析

利用ISSR分子标记对10个优质红锥品种进行基因组多态性分析．从20条引物中筛选的11条具有扩增多态性的引物共扩增出435条带，其中多态性条带325条，占总扩增条带的74．7％，平均每个引物扩增3．95条．ISSR标记揭示的10个优质红锥品种的遗传相似系数变化范围为0．4737～0．8081，平均值为0．7287．聚类分析可将10个优质红锥品种分为四类．     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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