neighbor-joining造句
例句与造句
- Because the guide tree is not near - optimal , an improved neighbor - joining was designed that its idea is to look for a leading taxon . 7
针对其在指导树生成方面存在近似程度不高的问题，运用寻找主结点的思想，设计了neighbor - ioining的改进算法。 - 6 . neighbor - joining algorithm is used for constructing a guide tree in clustal program . it is the core algorithm of some guide tree special softwares
Clustal程序的指导树构建采用neighbor - joining邻位相连算法，该算法同时也是很多指导树生成专用软件的核心算法。 - The results are agreeable with morphological taxonomy . the software mega was used to analyze the molecular phylogeny and phylogenetic trees were constructed with the neighbor - joining method and the maximum parsimony method
对所得的基因序列用mega软件包进行系统进化分析， nj法和最大简约法( mp )构建毛冠鹿和麂属3种动物的分子系统进化树。 - Phylogenetic relationship of sequences was constructed by neighbor - joining method in mega and maximum parsimony algorithm in paup . the same two groups were showed in the results , and the group b sequences were more similar to two sequences of caiman crocodilus
Nj法和mp法构建的系统树极为相似， 10种序列聚为两支( a和b ) ，分支b与凯门鳄的两种序列的亲缘关系较近。 - Pairwise comparisons of uncorrected sequences distances and kimura 2 - parameter distances were calculated and molecular phylogenetic trees were reconstructed by using the neighbor - joining ( nj ) , maximum parsimony ( mp ) , maximum likelihood ( ml ) methods
分析了?科鱼类s7核糖体蛋白基因内含子2序列，计算了p - distance和kimura2 - parameter遗传距离，并用邻接法、最大简约法、最大似然法重建了?科鱼类分子系统树。 - It's difficult to find neighbor-joining in a sentence. 用neighbor-joining造句挺难的
- The data matrix for the 37 taxon contained 553 variable sites ( 57 . 6 % ) , of which 336 were phylogenetically informative . the phylogenetic relationships were inferred using the neighbor - joining and maximum - parsimony methods . in mp method , the heuristic search generated two single most parmonious tree
双盖藏属diplazium 、菜蔽属c公刀ipteris 、短肠蔗属allantodia和肠获属diplaziopsis构成单系起源，在两种系统树中分别得到98 % ( mp )和100 % ( nj )的支持率。 - The obtained haplotypes are compared , aligned and analyzed by dna sequence analysis software package dnastar , dnasp , mega , to calculated residue composition , polymorphic sites and genetic distance , to consider the types and rates of residus substitution and to create neighbor - joining ( nj ) phylogenetic trees and determine phylogeny of the classification taxa involved in the research . 5
5 、盲榕科昆虫cytb基因序列分析方法和分析结果直接反映着被试分类单元的遗传物质的差异和遗传本质，是最为客观的系统分类依据，所以可应用于盲峙科的种类的鉴别、种群的分析、种上类群的划分以及科级阶元水平系统发育关系的确定。 - The percentage of polymorphic sites , degree of genetic polymorphism and genetic distance were compared and the phylogenetic tree was constructed by neighbor - joining method . the partial mitochondrial 16s rrna gene was amplified by polymerase chain reaction ( pcr ) and the pcr products were directly sequenced after purified . these sequences , together with the homologous sequences of another trichiuridae species lepidopus caudatus obtained from genbank were used to analyze nucleotide difference and to establish a upgma phylogenetic tree by means of biological informatics
汝us价ay1830 )各12个个体进行rapd分析，对比多态位点比例、遗传多态度以及遗传距离，并构建neighbor - join吨系统树;通过pcr扩增出线粒体165rrna基因，纯化后直接测序，利用生物信息学方法进行序列分析和核昔酸变异比较，结合ge红bar止中大西洋叉尾带鱼( lepid (护脚caud玫tuseuphrasen1788 )同源序列构建u甲cm叭系统树。 - Aligned with cytochrome b sequences from 29 siluriforms in japan , korea , russia , africa , north america and south america retrieved from genbank , and selected astyanax mexicanus , phenacogrammus interruptus , cyprinus carpio and oncorhynchus mykiss as outgroups , which are belonging to characiformes , cypriniformes and salmoniformes , respectively . we constructed a matrix of 65 dma sequences . the kimura ' s two - parameter distances were calculated and molecular phylogenetic trees were constructed by using the maximum parsimony ( mp ) , maximum likelihood ( ml ) and neighbor - joining ( nj ) methods
所得序列与从genbank下载的分布于非洲、北美洲和南美洲等地的鲇形目鱼类同一基因序列进行排序，并选用脂鲤目( characiformes )的墨西哥丽脂鲤( astyanaxmexicanus ) 、断线脂鲤( phenacogrammusinterruptus ) ，鲤形目( cypriniformes )的鲤( cyprinuscarpio )以及鲑形目( salmoniformes )大麻哈鱼属的oncorhynchusmykiss作外类群。 - The blastn results show that gyn - 15 is closely related to a symbiont of anemones , s . californium , and the free - living strain , gymnodinium varians . sequence comparison show that the similarities among each part of the sequences from these three strains are all above 99 % . phylogenetic reconstruction with neighbor - joining ( nj ) method using sequences of variable regions ( v1 + v2 + v3 ) of ssu rdna indicated that gyn - 15 , s . californium and g . varians form a new clade with 100 % bootstrap support
以ssurdna序列中的三个可变区( vz + vz + v3 )和邻接法困eighbor一joiningmethod ， nj法)构建共生甲藻属的系统进化树表明， gyn一巧与5 . cal扣rnium和g . varian :在共生甲藻属内构成一个独立的、自检支持百分率为100 %的子类群( clade ) ，根据这些结果可将gyn一巧初步鉴定为属于共生甲藻属。 - Three amendments are made to neighbor - joining method : first , a more precise evolution model is used to calculate the distance between sequences ; second , sequences are used to generate multiple typological structures , and hence compensate the shortcoming of neighbor - joining method , which can generate only one typological structure ; third , back mechanism is introduces to avoid the negative branch length in distance method and get a more accurate tree
本文对距离法中的邻接法进行了三点改进: 1 .使用更精确的进化模型来度量序列之间的距离,降低因模型而带来的误差; 2 .通过队列产生多个拓扑结构,解决了邻接法只能产生一个拓扑结构的缺陷; 3 .引入回退机制,消除了距离法中负枝长的产生,得到的树更准确。 - 8 computer program , then used to calculate di stance matrix with kimura ' s two - parameter method and construct phylogenetic trees by applying neighbor - joining and maximum parsimony analyses using mega2 . 1 computer program . bootstrap analyses were carried out to evaluate statistical reliability based on 500 resamplings of the data set
新鲜或硅胶干燥样品被用于总dna提取并用于pcr反应， pcr扩增产物回收后直接用于测序反应，序列数据经chstalx1 . 8软件排序后，采用mega2 . 1软件根据kimura ’ s双因子法计算遗传距离，并应用邻接法( neighbour - jointing )和最大简约法( maximumparsimony )构建系统树， bootstrap法( 500次重复)评估分支可信度。 - The evolutionary characteristics of both stems and loops of 16s rrna gene partial sequence were analyzed . the kimura ' s 2 - parameter distances were calculated and molecular phlogenetic trees were reconstructed by using the neighbor - joining ( nj ) , maximum parsimony ( mp ) , maximum likelihood ( ml ) methods
分析了?科鱼类16srrna基因部分序列茎区( stemregions )和环区( loopregions )的进化特点；计算了kimura2 - parameter遗传距离；并用邻接法、最大简约法、最大似然法重建了?科鱼类分子系统树。
