查询词典 polymorphism

Kanzawa pointed, the abdominal vertebra BMD of PTH gene individuals in BB genetype is obviously higher than those of Bb and bb genetype,so he considered that the BstBI polymorphism of PTH gene has dependability with BMD while the DraⅡpolymorphism of PTH gene has no dependablity with BMD.3 The polymorphism of estrogen receptor gene and postmenopausal osteoporosisPMOP is a metabolic bone disease existing in post-menopause femmes, as a result of these femmes\' hypofunction of ovary,ESG level drawdown and the disequilibrium of bone couple procedure,the bone resorption of osteoclast exceeds the bone formation of osteoblastic,osteopenia and bone fragility accrescence have developed,then induces fracture and so on.

Kanzawa等研究发现，BB型PTH基因人的腰椎BMD较Bb、bb型显著为高，认为PTH基因BstBⅠ多态性与BMD有相关性；但PTH基因DraⅡ多态性则与BMD无相关性。三雌激素受体基因多态性与绝经后骨质疏松绝经后骨质疏松是指绝经后妇女由于体内卵巢功能低下，雌激素水平低落，骨偶联过程失衡，破骨细胞的骨吸收大于成骨细胞的骨形成作用所导致的骨量减少，骨脆性增加，进而易于发生骨折的代谢性骨疾病。

1Niche construction can lead to stable coexistence of diverse genotypes in spatially structured population, which supports a stable polymorphism even without heterozygote superiority.(2)With habitat deterioration, niche construction accelerates the formation of steady polymorphism and hence impedes the harmful influences of environment on the population, which might embody a life-history strategy of organism under the unfavorable environment.(3)Niche construction results in the coexistence with alternative polymorphism through genotype-environment feedback and limited gene flow.(4)The niche-constructing organism is an active force to alter its environment and hence the direction of natural selection in order to better survival.(5)Spatial dynamics and distribution pattern of metapopulation are profoundly influenced by time-lagged niche construction.(6)Metapopulation size can reach a fixed level in the recency effect and equal weighting of time lag but is statistical stability in primacy effect, which implies the primacy effect is most remarkable.(7)The increment in the relative weightingof each generation\' niche construction and the length of time lag are significant factors for system destabilization.(8)Moderate capacity of positive niche construction benefits the metapopulation persistence.(9)The narrowing of niche breadth can decrease the metapopulation size and thereby increase the extinction risk.(10)The coupled function of time lag and niche construction make the system oscillation and generate the spiral wave, spiral-broken and circular wave in heterogeneous habitat.The spatial distributions of metapopulation and resource content are complementary due to a phase lag of their both frequencies.(12)Metapopulation persistence with niche construction depends not only on the balance between colonization and extinction, but also on the balance between the ability of niche construction and natural dissipation of habitat.(13)Metapopula-tion can survive under certain condition when the percent of suitable patches in habitat is lower than the ration of extinction to colonization.(14)Two thresholds exist in the process of transition of habitat quality dynamics from unsuitable to suitable, which include the intensity of niche construction and the initial condition of system.(15)Metapopulation size is positive correlated with the ability of positive niche construction, which means that organism or population who has strongly positive influences on their environment plays an important role to maintain the available habitat.

通过上述几个方面的研究，主要得出以下15条结论：(1)生态位构建可使空间结构种群，甚至是在没有杂合子优势的条件下，形成多种可能的稳定基因型分布模式；(2)随着环境的破坏与恶化，种群的生态位构建作用加速其较早形成稳定多态以阻碍环境对种群的不利影响，解释了有机体在不利环境下的一种生活史对策；(3)生态位构建作用通过基因型—环境反馈机制及有限的基因交流导致基因型多态的稳定共存；(4)有机体的生态位构建作用是一种积极的动力改变环境进而改变其自然选择的方向；(5)生态位构建的时滞作用对集合种群动态和空间分布产生深刻影响；(6)集合种群大小在时滞的崭新效应和等权重效应下达到一固定值，而在首位效应下达到统计稳定，表明首位效应的影响最显著；(7)首位效应下生态位构建相对权重的增量和时滞的长度是影响系统不稳定性动态的关键因素；(8)适中的生态位构建强度有利于集合种群的续存；(9)生态位宽度变窄会减少集合种群的数量从而增加其灭绝风险；(10)时滞和生态位构建的双重作用使系统产生周期振荡，并在异质性环境中产生稳定的螺旋波，破碎的螺旋波和环形波三种分布模式；(11)集合种群与资源含量的空间分布因为相滞而互补；(12)具有生态位构建的集合种群续存不仅取决于侵占率与灭绝率之间的平衡，而且依赖于生态位构建能力同其生境的自然消耗速率之间的妥协；(13)当生境中适合侵占的斑块比例小于其侵占率与灭绝率之比时，生态位构建作用促使集合种群在一定条件下续存：(14)生境斑块的状态从不适合到适合转变过程中存在生态位构建强度和系统初始条件这两个阈值；(15)集合种群的大小同正生态位构建能力正相关，意味着对环境具有较强正作用的有机体对维持有效生境起积极作用。

Single nucleotide polymorphism is the most common type of sequence difference between alleles, which can be used as a kind of high-throughput genetic marker.

单核苷酸多态性(Single nucleotide polymorphism， SNP)是等位基因间序列差异最为普遍的类型，可作为一种高通量的遗传标记。

The further analysis was given to Rhesus boxes specific sequencing and RHD gene homozygosity determined by PCR-restriction fragment length polymorphism analysis to Rhesus boxes.

然后对Rh盒子基因进行特异性测序分析，同时对Rh盒子基因的扩增产物采用聚合酶链反应-限制性片段长度多态性（restrict fragment length polymorphism，RFLP）方法进行RHD基因的纯合性测定。

Restriction Fragment Length Polymorphism analysis of 16S rDNA sequence was used to reveal the diversity of culturable rare actinomycetes.

采用16S rDNA的限制性片断长度多态性(Restriction Fragment Length Polymorphism，RFLP)分析和序列分析，揭示其多样性。

Some intergeneric hybrids (Sugarcane×Erianthus fulvus) were identified by chromosome counting and RAPD (Random Amplified Polymorphism DNA) technique.

采用体细胞染色体计数和RAPD(Random Amplified Polymorphism DNA)分子标记的方法鉴定甘蔗与蔗茅属间杂交种F1的真实性。

Analyzing the DNA Polymorphism: 14 random primers were selected to analyze the DNA polymorphism of 13 species of Melampsora larici-populina, the result indicates: The isolates of MLP have resemblance and difference, thee differences reflect the DNA Polymorphism of them.But the Polymorphism is not related to their origin.the result is consistent with departed one.

2DNA多态性分析：用所选出的14条随机引物对13种落叶松-杨栅锈菌进行RAPD分析，发现落叶松—杨栅锈菌菌种之间既有一定相似性，又具有明显的遗传多态性且多态性与地理来源没有必然的相关性，这与以往的结论相一致。

To validate an investigation method for the epidemiology of Clostridium perfringens in chicken,genetic diversities of 34 strains of C.perfringens type A isolated from healthy chicken of 10 diffe-rent integrated chicken farms in Sichuan Province were analyzed by repetitive extragenic palindromic PCR and amplified fragment length polymorphism methods.

为探讨鸡产气荚膜梭菌流行现状的调查方法，采用REP-PCR(repetitive extragenic palindromic PCR)技术对四川省10个规模化鸡场分离得到的34株A型产气荚膜梭菌进行了遗传多样性分析，并与AFLP（amplified fragment length polymorphism）方法进行了分型比较。

The qualitative and quantitative analysis of schizophrenia and single nucleotide polymorphism of catechol-O-methyltransferase , Proline Dehydrogenase and DYSBINDIN genes were done by using transmission disequilibrium test . Results:(1) The symptoms of first-episode schizophrenia were divided into four independent symptom dimensions: psychomotor poverty, reality distortion, disorganisation and depression-anxiety.

4采用传递不平衡检验、单倍型传递不平衡检验和定量性状传递不平衡检验的方法对6号、22号染色体上3个候选基因，即儿茶酚氧位甲基转移酶(catechol-O-methyltransferase，COMT)、脯氨酸脱氢酶(Proline Dehydrogenase，PRODH)和DYSBINDIN基因的9个单核苷酸多态性(single nucleotide polymorphism，SNP)位点与精神分裂症、神经认知功能、人格特质和临床症状表现的关系进行了定性和定量的遗传学分析。

The progress levels of symptoms after pathogen infection showed that interaction of gray leaf spot pathogen and host has differentiation or polymorphism. The progress levels of symptoms is different.The aggressively has polymorphism. The pathogenicity of different isolates in same cultivar has polymorphism, or the host reaction type of same isolate in different cultivars has polymorphism.The host reaction type has differentiation. There are seven types of host reaction in cultivar and inbred after infected by GLS pathogen:Rectangular lesion without chlorotic halo, Rectangular lesion with chlorotic halo,Irregular lesion without chlorotic halo,Irregular lesion with chlorotic halo, Spot lesion with chlorotic halo,Rectangular and irregular lesionand Rectangular and spot lesion. The host reaction type is coalesced lesion when disease severely. Frequency of each reaction types is different.

通过对玉米灰斑病菌侵染后的显症过程的系统观察，可在组织水平上说明该病菌与寄主互作反应存在分化或多样性：玉米灰斑病菌不同菌株侵染后显症过程表现出明显的差异；玉米灰斑病菌在侵袭力上存在多样性，菌株间对同一种品种的致病性表现多样化，或者同一菌株对不同品种侵染引起的寄主反应表现为多样性；病斑反应型的分化，玉米灰斑病菌侵染玉米品种或自交系后，主要有7种病斑反应类型，即RH型、RN型、IRH型(不规则形具褪绿晕圈病斑)、IRN型(不规则形无褪绿晕圈病斑)、SH型、RI型(长矩形与不规则形混合病斑)和RS型(长矩形与斑点形混合病斑)，若发病严重，病斑连成片，而且这些反应类型出现的频率也不同。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐