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．     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.