系统发育

The new shape of the gnathostome tree shows that early sarcopterygians, as well as Actinopterygians and chondrichthyans, ought to be turning up in Silurian sediments.

朱敏等构建的进化树推进了对早期硬骨鱼类和有颌类的系统发育关系的研究。

Phylogeny and systematics of sect. Macranthae and sect. Smilax in the Smilax were investigated based on morphology and molecular data.

本文通过形态及分子数据的分析对菝葜属圆锥菝葜组及穗菝葜组进行了系统发育研究。

Accessions from subgenus Amygdalus, subgenus Prunus, subgenus Armeniaca, subgenus Cerasus were studied by RAPD technology and clustered according to mentioned phylogenic contents. Polymorphic information contents were calculated among species in subgenera and demes in P.

运用RAPD技术对223个桃、李、杏、梅、樱类植物进行分子标记，采用聚类方法对上述内容研究，综合两种方法研究结果，探讨桃亚属植物分子系统发育关系，并对引物在各类间的多态信息量分析。

The internal transcribed spacer regions of nuclear ribosomal DNA from 8 species of subgenus Amygdalus were sequenced, and analyzed together with other ITS data of 18 species representing subgenus Cerasus, subgenus Armeniaca and subgenus Primus by using of Padus racemosa Gilib. and Padus buergeriana Yüet Ku as outgroup for studying phylogeny of subgenera in stone fruit plants.

采用核核糖体DNA内转录间隔区对桃亚属的光核桃、甘肃桃、新疆桃、山桃、陕甘山桃、扁桃、野扁桃基因序列测序及来源于GenBank的李、杏、梅、樱的18个种的ITS区基因序列，以稠李和楼木、梅和杏分别作为对桃亚属及其近缘亚属植物、桃亚属各种类的外类群，进行系统发育树的建立。

Urticae and constituting the phylogenetic tree, we found that they were similar to or completely identical with the wsp gene sequences of some strains of Wolbachia of Ori group in B supergroup.

对序列进行系统发育分析，发现它们全部与B大组Ori组的乳Wolbachia株系十分相近或完全相同。

The prospects of molecular systematics in Aphidinea in the future are also discussed.

并对未来蚜虫分子系统发育研究趋势进行了展望。

In insect molecular systematics, however, only partial sequence was used in several studies.

然而在昆虫中，仅仅部分基因片断被用于少量分子系统发育研究。

Resolving the higher-level relationships among ostariophysan and related fishes will aid in resolving basal teleostean divergence and provide basis to historical biogeographic analysis of major freshwater fish groups.

解决骨鳔鱼类及其相关类群的高阶系统发育关系有助于解决基部真骨鱼的分化，而且为主要的淡水类群——世界性分布的耳鳔系鱼类的历史生物地理学分析奠定基础。

Although ubiquitous, the taxonomy and phylogenetic relationships of fish trypanosome s are uncertain.

在自然条件下，锥虫经吸血水蛭传播广泛寄生于各种海水和淡水鱼类，但鱼类锥虫的分类和系统发育关系并不清楚。

Keywords fish trypanosome ;isolation;taxonomy;phylogeny analysis

鱼类锥虫；分离；分类学；系统发育分析

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。