natural mutation
英 [ˈnætʃrəl mjuːˈteɪʃn]
美 [ˈnætʃrəl mjuːˈteɪʃn]
自然突变
双语例句
- It mimics Darwinian natural selection, making "fitness"( as determined by a formula applied to an individual) the chief selector of individuals for survival and procreation, together with mutation.
它模拟达尔文的自然选择，还有变异，把“适应性”（正如适用于个体的公式所决定的那样）作为主要因素选择生存繁衍和变异的个体。 - When one organism ingests another in the natural world, it is just eating, whereas in financial services mergers and acquisitions can lead directly to mutation.
在自然界中，当一个有机体吞下另一个有机体时，它只是在进食，而在金融服务业，并购可能直接导致突变。 - Natural selection tends to maintain a mutation rate for maximal evolvability.
自然选择倾向于保持一个使可进化性最大化的基因突变率。 - He believes that the natural disasters and mutation of the sky and earth were not the external manifestation of the natural movement, but the will of personified "Heaven".
他认为，自然灾害和天地的变异不是自然界运动的外在表现，而是作为有意志的人格神&“天”的意志的表现。 - Natural properties of mutation, growth, and symmetry are drawn parallel to global social issues of cultural hybridization and development.
把自然性的基因突变，发展和保持平衡与文化杂交和发展的全球性社会问题作一个比较。 - Traditional natural isolation, mutation and selection, rational screening and protoplast fusion have made a great progress in the improvement of both Penicillium chrysogenum and Cephalosporium acremonium, two main industrial strains for production of P-lactam antibiotics.
传统的突变和选择、理性化筛选技术和原生质体融合技术最大可能地提高了β-内酰胺类抗生素生产菌的发酵产量； - The main breeding methods of polyploid grape such as natural mutation, induction by colchicine treatment, hybridization, selecting of natural seedling, endosperm culture and uses of 2n gametes etc.
探讨了多倍体葡萄育种的主要途径如自然芽变、化学诱变、人工有性杂交、实生选育、2n配子利用和胚乳培养等。 - Methods By using gene chip technique, HBV-DNA was amplified by PCR, incorporated with fluorescence, hybridized with oligonucleotide to detect the gene sequence of DNA by computer analysis and observe the natural mutation of HBV-DNA ORF.
方法通过基因芯片技术，将HBVdna进行PCR扩增，掺入荧光分子标记，与点阵列的寡核苷酸杂交，通过计算机分析，检测HBVdna的基因序列，观察HBVdna阅读框架各位点的自然变异。 - Genetic algorithms model natural processes, such as selection, recombination, mutation and search a population of points in parallel, is not just a single point.
由于遗传算法是用点群进行寻优，而不是用一个单点进行寻优，具有隐含并行算法的特点； - An adaptive chaos genetic algorithm was used to solve the model. The algorithm used natural number coding method with dynamically adjustment for the probability coefficients of crossover and mutation, and used chaos optimization method as the mutation operator.
对于模型的求解方法，构造了一种自适应的混沌遗传算法，采用自然数编码方式，动态的在线调整算法的交叉和变异概率，并采用混沌优化方法作为变异算子。 - However, about 67% ( 2/ 3) point mutants and 33% ( 1/ 3) deleted mutants were showed in the natural mutants. Their mutation degree was far lower than that of the γ ray induced mutants.
在3个自然突变克隆中，点突变和缺失突变的比例分别为67%（2／3）和33%（1／2），突变程度远远低于照射组。 - The article reviews the advance on the breeding technology of high yield stains in agricultural antibiotic, including natural selecting breeding, mutation breeding, gene recombination breeding and biotechnology breeding.
综述了近年来国内外农用抗生素生产上常用的几种高产菌株育种技术的研究进展，内容包括：自然选育、诱变育种、基因重组育种、生物工程育种技术。 - The applied study of natural selection, induction of mutation and gene engineering were discussed on Spirulina breeding.
介绍了近几年来螺旋藻藻种选育的研究进展。从自然分离、人工诱变、基因工程等3个方面论述它们在螺旋藻育种中的应用。 - The strategy of this engineering is to simulate the process of protein molecular natural evolution, to introduce the random mutation in the gene of target protein, and to select the excellent character of mutant.
该工程策略是：模拟蛋白质分子自然进化过程，在目的蛋白质的基因中引入随机突变，然后筛选出性状优良的突变体。 - It introduces the natural number coding method, adaptive probabilities of crossover and mutation, and furthermore, makes use of heuristic information to improve search efficiency effectively.
算法采用自然数编码，自适应的交叉变异算子，并融入启发式信息有效地提高了搜索效率。 - The natural number coding, the random population selection, the simple crossover strategy of "two-parents-and-one-kid" and the fixed mutation probability were totally adopted.
在算法中采用了自然数编码、随机选取种群、简单的双亲单子交叉策略和固定的突变概率。 - Rice long glume ( lg) mutant resulted from a natural mutation of flower organ, the mutant have two long glumes which is longer than the fruit total lenghth, and the other parts of flower organ are norm.
水稻长护颖突变体Longglume（lg）是从育种中间材料中发现的一个花器官自然突变体，突变体的护颖长于果实总长，花器官的其余部分均正常。 - The ID movement neither completely denied Darwinism, nor denied the existence of evolution, however, it mostly criticized Darwin and his adherents regard natural selection and random mutation as the uppermost and only root of evolution.
ID运动没有全盘的否定达尔文主义，也不否定进化现象的存在，而是批评达尔文及其追随者把自然选择和随机突变作为进化现象最主要的、甚至唯一的根源。 - Using wild type Aspergillus oryzae isolated from natural fermented millet catsup as original strain ( S), several mutated strains were obtained by ultraviolet mutation.
以自然发酵的粟米酱中分离的野生型米曲霉为出发菌株（S），经分离、纯化后，采用紫外线诱变育种的方法，获得新的变异菌株。 - Since the long biology evolution and natural selection, the species have formed the ability of adapting the nature strongly. Even if had been caused mutation, the species eliminated the bad individuals and reduced mutations with the individuals growing and evolving.
由于物种长期的生物进化和自然选择，使生物形成了对自然界的较强的适应能力，即使发生变异，也会因个体的生长及选择而淘汰不良个体，减少突变。 - Currently, due to limited sources of natural AS, not high transfection efficiency, easy to mutation and hard to break and so on for gene therapy of AS, the combination of AS and traditional treatment have become its development orientation.
目前，因天然AS来源有限，AS的基因治疗又存在着转染率不高，易突变，清除率高等难以突破的困难。因此，AS与肿瘤传统治疗方法的结合已成为其发展的方向。 - The current methods of mutation including natural transformation, conjugation and electroporation using suicide plasmid are defective in the efficiency of transforming and double exchange of homologous recombination. So it is necessary to establish a set of effective mutation system.
目前使用的基因突变方法，如自然转化，接合转移以及自杀质粒电转化的转化效率和发生同源重组双交换的效率比较低下，所以一套高效的突变系统的建立是非常必要的。 - However, wheat is hexaploid that consists of three homologous chromosomes and with a large number of repetitive sequences and gene redundancy, natural mutation rate is very low, genetic base is narrow and resistant starch content is very low.
但普通小麦是六倍体，具有三个同源的染色体组，有大量的重复序列和基因冗余，自然突变率很低，遗传基础较狭窄，抗性淀粉含量很低。 - The paper uses Genetic Algorithms method to solve the model due to complexity. In the algorithms, the natural coding method is applied, the crossover and mutation operators is altered by adaptive probabilities.
考虑到模型的复杂性，本文运用遗传算法，采用自然数编码方案，通过自适应的方法进行交叉和变异操作，对此模型进行求解。 - To study the phenomenon of the evolution of life from a program perspective, both Lamarckian "use and disuse" evolutionary mechanisms and Darwin the "natural selection" evolutionary mechanism have their program realization foundation, only their genetic mutation occurred time and cause are different.
从程序视角来看待生命进化现象，拉马克的用进废退进化机制和达尔文的自然选择进化机制都有其程序实现的基础，只不过它们的基因突变发生的时间和起因不同罢了。 - Natural mutation of MSTN gene in mice shows double-muscle phenotype and the weight of muscle tissue in gene knocked-out mice will increase by 2-3 times.
自然界MSTN基因突变的小鼠会出现双肌表型，该基因剔除的小鼠肌肉组织重量增加2-3倍。 - Dysfunction of MSTN gene either by natural mutation or induced through genetic manipulation ( knock out or knock down) has been reported to increase the muscle mass in mammalian species.
自发突变或遗传操作（敲除或下调）造成的MSTN失活，已经被报道可以增加许多种动物的骨骼肌数量。 - So far, it has been produced β-conglycinin subunits missing material by natural variation or artificial mutation breeding way, and its molecular basis has been in-depth studied.
到目前为止，人们已经得到了一系列经自然变异或人工诱变产生的具有p-伴大豆球蛋白不同亚基缺失表现的育种材料，并对其分子基础进行了深入研究。 - Secondly, the author puts forward an improved genetic algorithm which adopts ten-digit natural coding to construct chromosome coding and designs crossover operators and mutation operators.
其次提出了一种改进的遗传算法，采用十进制自然编码方式来构造染色体编码，并针对这种染色体设计了交叉算子和变异算子。