neighbor-joining 中文意思是什麼
neighbor-joining
解釋
近鄰結合法-
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法構建的系統樹極為相似， 10種序列聚為兩支（ a和b ） ，分支b與凱門鱷的兩種序列的親緣關系較近。 -
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序列中的三個可變區（ vz + vz + v3 ）和鄰接法困eighbor一joiningmethod ， nj法）構建共生甲藻屬的系統進化樹表明， gyn一巧與5 . cal扣rnium和g . varian :在共生甲藻屬內構成一個獨立的、自檢支持百分率為100 %的子類群（ clade ） ，根據這些結果可將gyn一巧初步鑒定為屬于共生甲藻屬。 -
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
對所得的基因序列用mega軟體包進行系統進化分析， nj法和最大簡約法（ mp ）構建毛冠鹿和麂屬3種動物的分子系統進化樹。 -
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
所得序列與從genbank下載的分佈於非洲、北美洲和南美洲等地的鯰形目魚類同一基因序列進行排序，並選用脂鯉目（ characiformes ）的墨西哥麗脂鯉（ astyanaxmexicanus ） 、斷線脂鯉（ phenacogrammusinterruptus ） ，鯉形目（ cypriniformes ）的鯉（ cyprinuscarpio ）以及鮭形目（ salmoniformes ）大麻哈魚屬的oncorhynchusmykiss作外類群。 -
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
本文對距離法中的鄰接法進行了三點改進: 1 .使用更精確的進化模型來度量序列之間的距離，降低因模型而帶來的誤差; 2 .通過隊列產生多個拓撲結構，解決了鄰接法只能產生一個拓撲結構的缺陷; 3 .引入回退機制，消除了距離法中負枝長的產生，得到的樹更準確。 -
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價ay1830 ）各12個個體進行rapd分析，對比多態位點比例、遺傳多態度以及遺傳距離，並構建neighbor - join噸系統樹;通過pcr擴增出線粒體165rrna基因，純化后直接測序，利用生物信息學方法進行序列分析和核昔酸變異比較，結合ge紅bar止中大西洋叉尾帶魚（ lepid （護腳caud玫tuseuphrasen1788 ）同源序列構建u甲cm叭系統樹。 -
The stone walls keep the farmer ' s cows from joining his neighbor ' s cows
石頭墻使農民家的牛不會混入鄰居的牛群中去。 -
But the stone walls keep the farmer ' s cows from joining his neighbor ' s cows
但是石頭墻使這家農民的母牛不會加入到鄰居的牛群中去。 -
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
雙蓋藏屬diplazium 、菜蔽屬c公刀ipteris 、短腸蔗屬allantodia和腸獲屬diplaziopsis構成單系起源，在兩種系統樹中分別得到98 % （ mp ）和100 % （ nj ）的支持率。 -
After sequencing and cutting vector sequences by vecscreen software, these fragments were registered directly on - line and eight gi numbers were given : ay247106, ay220755, ay220754, ay216525, ay216526, ay220756, ay220753, ay220752, which are corresponding to zhyf001 ~ zhyf008 respectively. these dna fragments were aligned by the software, vector nti 6. 0, with neighbor joining ( nt ) method
7和100 ； zhyf001 zhyf005基因序列的正鏈和負鏈均與上游弓物序列100配對，但找不到下游引物序列的互補序列； zhyf008序列與上游引物序列100配對，但也找不到與下游引物序列的互補序列。 -
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
針對其在指導樹生成方面存在近似程度不高的問題，運用尋找主結點的思想，設計了neighbor - ioining的改進演算法。 -
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 、盲榕科昆蟲cytb基因序列分析方法和分析結果直接反映著被試分類單元的遺傳物質的差異和遺傳本質，是最為客觀的系統分類依據，所以可應用於盲峙科的種類的鑒別、種群的分析、種上類群的劃分以及科級階元水平系統發育關系的確定。 -
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程序的指導樹構建採用neighbor - joining鄰位相連演算法，該演算法同時也是很多指導樹生成專用軟體的核心演算法。 -
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?科魚類s7核糖體蛋白基因內含子2序列，計算了p - distance和kimura2 - parameter遺傳距離，並用鄰接法、最大簡約法、最大似然法重建了?科魚類分子系統樹。 -
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
新鮮或硅膠乾燥樣品被用於總dna提取並用於pcr反應， pcr擴增產物回收后直接用於測序反應，序列數據經chstalx1 . 8軟體排序后，採用mega2 . 1軟體根據kimura 』 s雙因子法計算遺傳距離，並應用鄰接法（ neighbour - jointing ）和最大簡約法（ maximumparsimony ）構建系統樹， bootstrap法（ 500次重復）評估分支可信度。
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