phylogenetic distance 中文意思是什麼

phylogenetic distance 解釋
種族發生的間距
  • phylogenetic : 系統發生的
  • distance : n 1 距離，路程。2 遠隔，遠離；遠處，遠方。3 （時間的）間隔，長遠，長久。4 懸殊。5 隔閡，疏遠。6 ...
  1. In this work, some species of palmae cultivated in the xiamen botanical garden had been selected to be analyzed their genetic diversity with rapd ( random amplified polymorphic dna ) technique. according to the result of genomic dna amplified with pcr ( polymerase chain reaction ), genetic distance and similarity between different palm species were calculated on nei " s estimate of similarity and genetic distance. a primary but first time research at the phylogenetic relationships of some genera and species, the molecular classification and identification of some puzzling species of palmae was carried out through upgma ( unweighted pair group mean average ) cluster analysis of the genetic distance together with comparative study of the morphological structure characteristics

    本文在初步調查分析了棕櫚科植物在我國的自然分佈、引種馴化情況以及該類植物在廈門地區栽培應用狀況的基礎上，首次採用rapd分子標記技術，對廈門萬石植物園引種的一些棕櫚科植物的遺傳多樣性進行了研究，根據pcr對基因組dna擴增的結果，用nei ' s相似性系數計算了不同植物間的遺傳距離和遺傳一致度，通過對遺傳距離的upgma聚類分析，並結合形態分類的特點，對棕櫚科植物的屬、種間的系統分類關系和一些疑難種的分類鑒定進行了初步研究。
  2. 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。
  3. Every living thing has a physical boundary that separates it from its external enviroment. beginning with the bacteria and the simple cell and ending with man, every organism has a detectable limit which marks where it begins and ends. a short distance up the phylogenetic scale, however, another, non - physical boundary appears that exists outside the physical one

    每一種生物都有一個可使之與外界環境分隔的邊界，從細菌到單細胞到人，每一個有機體都有一個可探測到的邊界用以界定其起止.然而，當上升一點兒到系統進化發育水平，則發現另有一個存在於有形的物理邊界之外還有無形邊界
  4. Aligned sequences were imported into mega2 and paup * 4. 0 for phylogenetic analysis using mp, ml, me and nj method. in each tree - building method, several distance measures or algorithms were used, but all these distance measures or algorithms produced essentially the same results as follows : 1

    使用四種常用的建樹方法： nj法、 me法、 mp法以及ml法，對斑翅蝗科部分昆蟲的系統進化關系進行研究，幾種方法所產生的分子樹的拓撲結構大致相同，僅在個別種的歸屬上存在差異。
  5. 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. Then the genetic distance and shannon information index among these 13 strains were obtained by using the software popgen2 on the basis of pcr - rflp patterns. the phylogenetic tree was constructed by using the upgma algorithm method ( mega2 software package ). the shannon information index indicated that there was a higher genetic diversity among the frankia strains and some strains had a big genetic distance with others

    根據酶切圖譜，通過popgen2軟體計算各供試菌株之間的遺傳距離；用shannon信息指數計算種群遺傳多樣性；利用upgma法（ mega2軟體）對所獲得的遺傳距離矩陣進行聚類分析，得到13株供試frankia菌株間系統發育的聚類分析樹狀圖譜。
  7. Conclusively, morphological similarity and distance in phylogenetic tree are far from the same thing, and no inevitable relationship exhibits between them

    由此推斷，形態相似性與進化關系的遠近是兩口事，二者之間無必然的聯系。
  8. In chapter five, morphological observations and its sequence analyses of monostromaceae in china were made. distance matrix and phylogenetic trees were obtained as described in last paragraph

    在第五部分，採用its序列分析結合傳統形態觀察的方法，對我國礁膜科樣品進行了研究，方法同前。
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