查询词典 phylogenetic

Phenetics, popular in the mid-20th century but now largely obsolete, uses distance matrix-based methods to construct trees based on overall similarity, which is often assumed to approximate phylogenetic relationships.

表现型分类法在20世纪中叶流行，但现在基本上已经过时；它是用基于距离矩阵的方法，在大体相似的基础上构建系统树；大体相似往往被假定为亲缘关系接近。

Phylogenetic subtrees for subfamily containing core diether lipids of C20-C25 were produced by the alignment of the 16S rRNA sequences of the two strains with those of other halobacteria, polar lipid compositions were analyzed, and some phenetic properties were determined.

二株嗜盐嗜碱古生菌（A33和GA33）的16S rRNA序列已经测定，以16S rRNA序列为基础的系统发育树通过于其它嗜盐古生菌成员16S rRNA序列的多序列匹配排列而建立。

Results show that molecularsystematics study can supplement the shortcoming of morphological study onspecies delimitation of Bothriocephalid tapeworms since molecular evolutioncan reflect the intrinsic phylogenetic relationships among species,and sincethe phenetic evolution and molecular evolution are independent processes,with the former reveals more conservative change than the latter.

结果表明形态学研究对于头槽绦虫种的界定存在明显不足，而分子系统学研究可以弥补这个不足；两者在进化上位于不同层次，前者进化速率非常缓慢，相对而言后者更能反映物种间遗传本质上的亲缘关系。

Phylogenetic analysis also suggests that some phages seem to converge with their hosts rather than other phages.

系统发生分析显示，序列相似性高的噬菌体较容易与其宿主聚集，产生寄生关系。

However, the phylogenetic positions of some genera, such as Phaedyma, Pantoporia and Lintinga, are not well-resolved in the present study.

对于穆蛱蝶属、菲蛱蝶属和蟠蛱蝶属，本研究没有完全解决它们与所在支系内其它属间的亲缘关系。

Mothods: Cock embryo was used to isolate influenza viruses, and the virus titer was determined through hemagglutination test. The gene was amplified by RT-PCR technique from the isolated strain and sequenced, and the gene phylogenetic tree was analyzed.

采用鸡胚进行病毒分离，采用血凝试验初步确定病毒效价，用逆转录聚合酶链反应法扩增分离株的部分片段后进行克隆和测序，然后进行进化树分析。

Platyrhynchos and spot-billed ducks taken from GenBank, a total of 30 haplotypes were used in the phylogenetic analysis, and the results showed that the four domestic duck breeds originated from A. platyrhynchos.

platyrhynchos和斑嘴鸭序列，共有30种单倍型，共同构建系统发生树和网络关系图，结果表明4个家鸭品种单一地起源于绿头鸭。

The genetic distance and phylogenetic tree results shows: the Hu sheep, Tan sheep and the Small-Tailed Han sheep's relationship are closer than other populations involved, which have the same ancestor.

遗传距离和系统发生树的分析表明，滩羊、小尾寒羊和湖羊亲缘关系较近，类群起源上享有共同的祖先，岷县黑裘皮羊与其它6个绵羊群体遗传关系较远，7个绵羊群体的遗传结构推演为三类。

This paper summarizes the general properties of mitochondrial ribosomal RNA,transfer RNA,protein coding genes and noncoding regions,and the phylogenetic usefulness of individual mitochondrial genes for insect taxa.

通过对昆虫遗传物质的研究，探讨不同分类水平上的昆虫类群之间的系统发育、进化机制和种群遗传变异及分化，从生命的本质上探寻昆虫各类群之间的系统关系[1，2 ] 。

The position of red algae in phylogenetic trees inferred from GAPDH sequences was discussed.

通过GAPDH的分子系统发育分析，对红藻的分类地位进行了初步探讨。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。