查询词典 populations

The results show that the frequencies of both the agenesis and impaction of third molar are much higher in East Asian populations than all other populations around the world.

这一特征在居住于不同的地理区域的人类始发的时间及增加的速率不尽一致。结果造成了种族群体之间的差异。而第三臼齿阻生则是退化的另一种表现形式，但影响第三臼齿阻生的因素更为复杂。

The significance of the spatial variation in gene diversity among populations was estimated by per-forming a hierarchical analysis of genetic diversity among populations using the analysis of molecular variance model, as described in Michalakis and Excoffier (1996) and available in ARLEQUIN.

种间基因多样性空间变异的显著性用在分子变异模型上操作的种间遗传多样性层次分析来估计，如同Michalakis和Excoffier (1996)描述的，并且在 ARLEQUIN软件中也有效。

In the BC3F2 populations of six varieties and CH448, the CRL variances of different backcross populations were different.

在不同供体品种与CH448的BC3F2群体中，不同回交组合内CRE的变异有所不同。

Otherwise the populations of high niche breadths with the populations of low niche breadths may have more higher niche overlap,whereas low.

另外，高生态位宽度的种群与低生态位宽度的种群可能有较高的重叠值，反之则低。

Niche breadths of most native populations in natural forest were wider than that of P. armandii forest. Furthermore, competitions among populations were not so strong, and community structure was more stable, because of great niche differentiation in natural forest.

天然林中大多数乡土树种的生态位宽度较之在华山松林中大为增加，但由于长期协同进化，种间生态位分化程度高，种间竞争较缓和，群落具有很高的稳定性。

This study aims to explore the following questions: differences of the genetic polymorphism among seasonal populations; differences of genetic diversity among four age groups and between two different gender populations; testifying the Ford and Chitty hypothesis; the relationship between the genetic diversity and geographic distance; the relationship between the genetic diversity and population density; edge effect on genetic diversity.

主要探讨以下问题：季节种群间遗传多态的差异；种群年龄组和性别间遗传多样性的差异；Ford和Chitty的假说；种群遗传多样性与空间距离的关系；种群遗传多样性与密度的关系；中心区、边缘区和半岛区种群遗传多样性的差异。

In this algorithm, first, a crowed comparison operator is used to sort and select individuals according to the characteristics of multi-objective optimization. Then, a non-uniform mutation operator is applied to the observation populations to preserve the convergency of the solutions and to improve the precision of local search. Finally, a diversity-preserving operator is employed to delete the observation populations for the purpose of preserving the solution diversity.

首先，根据多目标优化特点，使用多目标密度比较算子对量子种群进行排序和筛选；然后，应用非均匀变异算子对观测种群进行变异以保持解的收敛性并提高局部搜索的能力；最后，使用多样性保持算子对观测种群进行删减以保持解的多样性。

The short tandem repeats is a kind of DNA sequence formed repeatedly and connectively subjected to a core unit of several base pairs.The non-interfered multi-PCR was applied with 3 loci in the same reaction system.By using the technique of denaturing polyacrylamide gel electrophoresis and silver stain,the allele frequencies distributions of 3loci:F13A01,FESFPS and vWA in 10 minority populations only resided in Yunnan Province:Bai,Dai,Achang,Jingpo,Deang,Lahu,Bulang,Hani,Pumi and Jino.A satisfactory result was obtained and some significant genetic differences were noticed in different populations.

短串联重复序列是由几个碱基对作为核心单位串联重复形成的-类DNA序列，应用3个位点在同一反应体系中进行互不干扰的多重PCR，采用高分辨力的聚丙烯酰胺凝胶电泳分离、银染法显影技术，对云南省特有的白族、傣族、阿昌族、景颇族、德昂族、拉族、布朗族、哈尼族、普米族和基诺族等10个少数民族的F13AO1、FESFPS和vWA3个位点等位基因的基因频率分布进行了调查，获得了满意的结果，在不同群体中发现一些有意义的遗传差异。

The course starts with reviews on the development of statistical genetics and genetic marker analysis, focuses on the basic principles of contraction of genetic map and mapping QTL, and introduces the approaches to construct genetic map for different type of populations and mapping QTL aiming at type of populations and traits.

本课程从评述数量性状研究方法和遗传标记的发展历程开始，着重讲授遗传图谱构建和基因定位的基本原理，介绍不同类型群体遗传图谱的构建方法和针对不同类型群体和性状类型的基因定位方法。

Genetic diversities were evaluated and compared at three levels of morphology(i.e., apical bud, leaf, seed and cupule for nine populations), allozyme and DNAs(AFLP analysis on four populations) in order to determine core germplasm of Q.

测定了共计9个群体的当年生枝的顶芽、叶、坚果、壳斗的表型多样性、9个群体的等位酶多样性、其中4个群体的DNA多样性，并对3个不同层次的遗传多样性研究进行了比较和评价。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。