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Some species of sturgeons are polypolids. The hybridization is common even between genera Acipenser and Huso. The parents of different species with the same chromosome numbers will produce reproductive offsprings, and thus, genetic introgression among species would easily happen in the nature conditions.

鲟具有多倍体特徵，其中鲟属及鳇属杂交的情形非常普遍，染色体倍数相同的亲代杂交产生的子代具有繁殖力，因此在自然情况下或人为移殖时很容易造成基因渗入现象。

The results were as follows:(1) Seeds of 80 species or subspecies could be classified into two groups. Group Ⅰ included the seeds of Gramineae, Cyperaceae, Polygonaceae and Amaranthaceae, and Group Ⅱ included the seeds of Compositae, Euphorbiaceae, Brassicaceae and Umbelliferae.(2) Only FTIRs of the seeds of Brassicaceae were clustered together in the dendrogram,while those of the other families all appeared farraginous.(3) Among FTIRs of the 11 groups of the congeneric species,8 groups were clustered with other genus species, and 6 out of 7 groups of conspecific seeds appeared farraginous in the dendrogram.

结果表明：(1)80种草本植物的种子可以分成两类，第1类由禾本科、莎草科、蓼科和苋科植物的种子组成；第2类由菊科、大戟科、十字花科和伞形科植物的种子组成；(2)聚类图上，只有十字花科植物的种子能较好地与其他科的相区别；(3)在11组同属不同种植物中，有8组植物与亲缘关系不同的其他属的植物混在一起；在7组同种不同亚种或品种植物中，仅有1组植物被聚合在一起。

Shall have the right to conserve and manage straddling species, highlymigratory species, marine mammals, anadromous stocks that originate inthe rivers of the People's Republic of China, and catadromous species

第六条 中华人民共和国主管机关有权对专属经济区的跨界种群、高度洄游鱼种、海洋哺乳动物、源自中华人民共和国河流的溯河产卵种群、在中华人民共和国水域内度过大部分生命周期的降河产卵鱼种，进行养护和管理。

The competent authorities of the People's Republic of China shall have the right to conserve and manage straddling species, highly migratory species, marine mammals, anadromous stocks that originate in the rivers of the People's Republic of China, and catadromous species that spend the greater part of their life cycle in the waters of the People's Republic of China.

第六条 中华人民共和国主管机关有权对专属经济区的跨界种群、高度洄游鱼种、海洋哺乳动物、源自中华人民共和国河流的溯河产卵种群、在中华人民共和国水域内度过大部分生命周期的降河产卵鱼种，进行养护和管理。

There were 203 avian species in Dazhanhe Nature Reserve, of which 92 Asseriformes species and 110 non-Asseriformes species were found, and composed mainly of Muscicapidae, Anatidae and Scolopacidae.

结果表明：大沾河自然保护区共有鸟类16目39科203种，其中雀形目鸟类16科92种，非雀形目鸟类111种，种类较多的科有鹅科、雀科、鸭科、鹬科等。

The order Odonata could be further subdivided into three suborders: around 2,500 species of Anisoptera, 2,500 species of Zygoptera and only 2 species of Anisozygoptera diverse damselflies

地球上现存的蜻蛉共约5，000种，分属於3亚目，其中俗称蜻蜓的不均翅亚目约有2，500种，俗称豆娘的均翅亚目约有2，500种，而称为蟌蜓的间翅亚目仅有2种

Based on the study of 120 cultivated herbaceous peonies and 8 wild species native to China, the relationship among them was firstly investigated, and the result indicated that 4 narrowly-distributed wild species involving Paeonia sinjiangensis K. Y. Pan, P. anomala L., P. emodi Wallich ex Royle and P. sterniana Fletcher have no chance to be the ancestor of Chinese cultivated herbaceous peonies. Then the difference and similarity existed in the root, leaves and flowers of the wild species and cultivars was exhaustively compared and it is concluded by the equivalent affinity between P. lactiflora Pall. and the cultivars.

以原产我国的120个栽培品种和8个野生种为主要研究对象，首先根据地理分布的差异对栽培芍药与各个野生种的亲疏关系进行了分析探讨，表明新疆芍药、块根芍药、多花芍药和白花芍药等4个窄布种不可能参与我国芍药品种的栽培起源；然后对栽培品种和各野生种之间的根、叶及花等性状的差异进行了细致的比较分析，进一步证明川赤芍亦不可能参与我国栽培芍药品种的起源，草芍药和美丽芍药等2个种对我国栽培芍药的起源影响甚微。

Asian (47.4%) and temperate genera mainly constituted by North temperate (50%) and E. Asian (50%). So that the geographical elements are discomplex. In the 25 species of arborous layer, 76% is the middle subtropical zonal type, 16% south subtropical zonal type and 8% north subtropical zonal type, of which the first 6 positions of important value index were all middle subtropical zonal type. This showed that the community was subtropical characteristic. There are 59.5% evergreen and 40.5% deblade of 79 known species in which the mid-phaenerophytes is the first position of all, accounting for 27.8%, and the evergreen broad-leaved species constituted the majority of meso-phaenerophytes which accounts for 15.2%.

乔木层多数优势种为稳定型种群，所以乔木层优势区系成分相当稳定，表明该群落为一种顶极群落。59个种子植物属只有10个分布区类型和4个变型，地理成分不复杂，其中热带分布27属占46.6%，温带分布31属占53.4%；热带分布以泛热带和热带亚洲分布为主，分别占52.6%和47.4%，温带分布为北温带和东亚分布各占50%。25个乔木层树种中，中亚热带地理分布类型的占76%，南亚热带地理分布类型的占16%，北亚热带地理分布类型占8%，重要值指数排列前6名的均为中亚热带地理分布类型，所以该群落为亚热带性质。

While statistical techniques have been optimized to improve model accuracy, less focus has been given to the question: How does the autecology of a single species affect model quality We compare a direct modelling approach versus a cumulative modelling approach for predicting plant species richness, where the latter gives more weight to the ecology of functional species groups.

当统计技术有效改善模式的正确性时，较少注意已存在的问题：个体生物学中，单一物种是否会影响模式特性我们比较直接模式与渐增模式在植物物种丰富度的准确性，后者的权重以生态功能物种分群。

Five pairs of 45S rDNA loci and two pairs of 5S rDNA signals were detected on chromosomes of Cucurbita moschata Duch. Luffa cylindrical Roem. contained five pairs of 45S rDNA loci and one pair of 5S rDNA loci. In Benincasa hispida Cogn., two pairs of 45S rDNA sites and one pair of 5S rDNA site were detected. In this species, 5S rDNA and one pair of the 45S loci were collocated closely in chromosome 7S. 45S rDNA chromosomal distribution patterns were highly conserved among the three species, althoufh their number varied markedly. The 5S rDNA sites on chromosomes among the three species were highly polymorphic.

南瓜有5对45S rDNA位点， 2对5S rDNA位点；丝瓜具有5对45S rDNA位点， 1对5S rDNA位点；冬瓜具有2对45S rDNA位点， 1对5S rDNA位点， 5S rDNA位点与其中一对45S rDNA位点都位于7号染色体短臂上，并在物理位置上紧密相邻。45S rDNA在这3种作物染色体上数目变化较大，但在染色体上都倾向分布在短臂末端，其分布模式较为一致。5S rDNA在这3种作物染色体上数目相对保守，但在染色体上分布的位置变化较大。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。