阶元

天牛科高级阶元分类研究进展

Progress in classificaton of higher taxa of the Cerambycidae

从分子系统学方面就节肢动物系统进化及高级阶元分类研究中争论的关键问题进行比较分析。

From the view points of molecular systematics , comparison and analysis for the key problems in the arguments about the phylogeny and evolution of the higher taxonomic taxa of Arthropoda were conducted .

结果表明，微卫星引物PCR扩增方法可用于物种间的遗传结构分析和亲缘关系的探讨，在种级阶元对蝗虫进行有效鉴别，是一种有效的遗传学指标

It is suggested that the microsatellite primer PCR analysis is useful as molecular marker for locusts in phylogenetic reconstruction at the species level

提示BDNF基因可以应用到目及目以下分类阶元间的系统发生研究中。

This suggests BDNF an appropriate candidate in the phylogenetic reconstruction at order or lower level .

〈ii〉通过具有解析解的磁场计算实例，此较了一、二、三阶元的计算精度、内存及CPU时间；

Second , by the example with analysis solution , the accuracy , computer storage and CPU time of first , second and third order element are compared .

最高阶元个数是4p的有限群

On finite groups with exactly 4P maximal order elements

植物DNA序列由于进化速率上的差异而适用于不同分类阶元的系统发育研究，因此，针对某一特定的系统学问题选择相应合适的分子片段是分子系统学研究中最为关键的一步。

DNA sequences , because of their disparity in the rate of evolution , are suitable for phylogenetic study at different taxonomic levels . It is , therefore , the most significant process to select an appropriate DNA region to address a certain phylogenetic issues .

河南荨麻科（Urticaceae）一些类群的订正它不属于正规植物分类学的分类阶元的范畴。

Revision of some taxa of Urticaceae from Henan It falls outside the scope of the formal taxonomic categories .

分类群的多样性从亚科、属和种3个不同阶元进行了描述。erectum，镰小羽介蕨D。

Taxa diversity is expressed in levels of subfamilies , genera and species . Three species , D.

以13个物种Myostatin3-′UTR构建的分子进化树表明，3′UTR能够为动物进化提供一定信息，但适用于较低分类阶元。

The phylogenetic tree constructed by 3 ′ - UTR of Myostatin genes in these 13 species shows that 3 ′ - UTR sequence can offer certain information for animal 's evolution .

12SRRNA基因由于其分布的普遍性、序列和结构的保守性以及进化速率镶嵌性而被广泛应用于不同分类阶元层次上的分子系统学研究。

Mitochondrial small subunit ribosomal RNA ( 12S rRNA ) gene has been used for phylogenetic analyses of a wide range of species and divergence levels for their universal occurrence , sequence and structure conservation and abundance .

C-mos是一种单拷贝、无内元的核基因，全长约1kb，便于从基因组中扩增并测序，可度量中等分类阶元的亲缘关系，目前主要应用于爬行类和鸟类的系统发生研究中。

We introduced here a nuclear gene c-mos . This is a kind of single copy nuclear gene with no introns , totally 1 kb or so . It is now mainly applied in the phylogenetic studies of reptiles and avians .

提高低阶元、粗网格计算精度的一种方法

An effective method of refinement of low-order element and rough mesh

它不属于正规植物分类学的分类阶元的范畴。

It falls outside the scope of the formal taxonomic categories .

双重标准差法在昆虫科阶元分类学上的应用

Use of double standard deviation at family level of insect taxonomy

粗糙集神经网络在昆虫总科阶元分类学上的应用

Application of a rough-set neural network to superfamily level in insect taxonomy

天牛科昆虫高级分类阶元实体的进化研究（英文）

The evolution in the higher taxa of the Cerambycidae ( coleoptera )

最高阶元对有限群结构的影响

The Influence of Element with Maximal Order on the Structure of Finite Group

既约剩余系中同阶元的对称函数（Ⅰ）

Symmetric Functions of Elements of the Same Order in Reduced Residue System (ⅰ)

数学形态学在昆虫分类学上的应用研究.Ⅰ.在目级阶元上的应用研究

Use of math-morphological features in insect taxonomy . ⅰ . At the order level

具有很多素数阶元的有限群

Finite groups with many elements of prime order

群的有限阶元之积的阶的一个结果

A result of the order of the product of finite order elements in a group

只有先对有机体进行命名并把它们归类成可以认识的分类阶元。

It is only by first naming organisms and then grouping them in recognizable categories .

侏罗-白垩纪非海相双壳类新分类阶元

New taxa of jura-cretaceous non-marine bivalves

系统既可以从分类较高阶元信息检索分类较低阶元的信息，也可以从分类较低阶元信息检索分类较高阶元的信息。

Searching process could be from higher to lower classification element , or the adverse direction .

研究表明由于鳞片表皮结构特征在高级分类阶元中具有保守性，因而可以提供有用的系统演化信息。

Characteristics of the epidermis provide valuable phylogenetic information because they are often relatively conservative at high taxonomic levels .

我们选择四个类群，从不同的分类阶元来研究其分子系统发育和估算分化时间。

We chose four groups , from different levels , to investigate the molecular phylogeny and divergence time estimates .

中国异跗节类昆虫的科级阶元与部分种类的口器表征（鞘翅目：多食亚目）

Study on the Family Category of Heteromera and Mouthpart Structure of Some Species from China ( Coleoptera : Polyphaga );

迄今，蝗科内各分类阶元之间的系统发生关系大部分是未知的。

The phylogenetic relationships among all taxa within the Acrididae ( Orthoptera : Acridoidea ) were largely unknown until now .

并以他那别具一格的嗓音而闻名。只有先对有机体进行命名并把它们归类成可以认识的分类阶元。

And was also know for his distinctive voice . It is only by first naming organisms and then grouping them in recognizable categories .