遗传

The range of Simple match coefficient was from 0.5877 to 0.9868 and the range of average was from 0.6732 to 0.7653,with the total average of 0.7237.The result indicated that the soybean population was with lower genetic variation.

品种间的遗传相似系数变化范围为0.5877～0.9868，平均值变化范围为0.6732～0.7653，总体平均值为0.7237，遗传相似系数较高，说明材料间遗传变异较小。

It can be concluded from the experiment results that hatchery seed has lower genetic variation and large-scale hatchery seed releasing affects the genetic diversity of the natural population. The shrimp distributed along China coast in Bohai Sea and Yellow Sea may consist of more than one populations. The viral disease resistant ability of F. chinensis is proved to be genetically inherited and can be improved by genetic selection.

通过对实验结果的进一步分析认为：中国对虾人工育苗的过程使后代群体的遗传多样性下降，人工培育苗种的大规模放流影响了自然群体的遗传多样性；，分布于我国沿海的中国对虾可能由多个自然群体构成，还存在未被发现的种质资源；中国对虾抗WSSV病毒感染是由遗传决定的，选育可提高中国对虾对WSSV的抗性。

UPGMA cluster analysis and genetic differentiation among populations showed that there had closer genetic relationship between Gongliu and Xinyuan populations and between Huocheng and Yumin populations and lower genetic variation between the populations.

UPGMA聚类分析和群体间遗传分化系数显示，巩留群体和新源群体之间，以及霍城群体和裕民群体之间，遗传关系最近，群体间遗传变异最低。

Results indicated that bar gene was integrated into wheat genome of T1 and T2 ,and bar gene expressed stably. Separation of bar gene in T1 and T2 complied with Mendel's law. Agronomic traits of yields and quality have no notable differences between bar-transgenic wheat and controls.

证实抗除草剂bar基因已经整合到小麦基因组中，并能稳定表达；遗传分析显示bar基因能稳定的遗传给后代，符合孟德尔遗传规律；在产量及品质等主要农艺性状方面，转bar基因小麦与对照相比无显著差异。

Second, taking risk taste coefficient into the model solve the problem of without risk taste in model. Third, it builds up a new model based on the thought of GA and mistiness mathematics as the fit function in GA.

第二，以遗传算法中的目标函数的方式建立了基金投资组合模型，以风险调整的收益的最大值作为遗传算法中的目标函数，应用遗传算法进行了求解。

A 25μL solution with genomic DNA 25ng/μL, MgCl_2 1.5mmol/L, dNTPs 0.1mmol/L, random primer 0.1μmol/L, 1U TaqDNA polymerase would be optimum for the amplification reaction. A high reproducibility was obtained with the optimized experiment conditions. The results of the genetic diversity among M. Mongolic, M. macrocopa and their s...

按照优化的RAPD条件进行实验，重现性良好。2种裸腹在盐胁迫条件下的种群遗传多样性分析表明，同种裸腹不同生存盐度之间的种群遗传相似度较高，分别为0.9134和0.9038；而多刺裸腹和蒙古裸腹两个种间的遗传相似度相对较低，约为0.5～0.6。

In a whole, the genetic diversity of clonal plants is much higher than that had been expected before. Although the genetic diversity is lower than their sexual congener, widely genetic monomorphism has been rarely found.

总体而言，克隆植物拥有比早期推测大得多的遗传变异，虽然克隆种与其近缘有性繁殖种相比，遗传多样性较低，但广泛的遗传单态性却很罕见。

Based on NewGA, the thesis proposes a multigroup parallel genetic algorithm with simulated annealing method , then combines MPGASA with BPNN. According to whether simulated anealing method is used or not, two parallel genetic neural networks are implemented respectively. Results show that PGANN_SA is superior to PGANN and NewGANN.

在NewGA的基础上首次提出一种基于模拟退火机制的多种群并行遗传算法MPGASA，将MPGASA与神经网络相结合，按照是否采用模拟退火机制接受新个体分别实现了两种并行遗传神经网络PGANN_SA和PGANN，计算结果表明采用模拟退火机制有利于改善遗传神经网络的性能。

As investigated, the shape of the fruit was mainly rotundity, and the color of the fruit were red, black, yellow, mauve. Variation coefficient of mineral elements, which revealed wider variation range and rich genetic diversity. Among them, Fe, the content and the variation coefficient of which was the highest(2.12 mg·100g-1 and 26.99％), it has large potential for futher selection. Ripe fruit of 12 wild myrobalan plum seedlings were analyzed using head space-solid phase microextraction and gas chromatography-mass spectrometry. The results showed considerable genetic variations in these aspects: The total content of volatile components, the classes and contents of each compounds classes, the segregation ratio, and content of main components. There were 83 compounds in total belonging to 6 classes detected in 12 wild myrobalan plum seedlings, including esters, alcohols, ketones, aldehydes, heterocycle and Hydrocarbons. Among them, Formic acid, hexyl ester, the content of which was the highest(4.33 μg·g-1),was important character impact odors.

结果表明，①新疆野生樱桃李实生株系的果实形状主要为圆形，少数为椭圆形、卵圆形、卵形和宽卵形，果实颜色有黄色、红色、紫红色和黑色等4种类型，野生樱桃李果实纵径、横径、单果重、果形指数以及可溶性固形物含量均存在一定程度的变异，遗传多样性较为丰富，其中以单果重的变异系数最大(9.13 %)；②新疆野生樱桃李实生株系果肉组织的Zn、Ca、Mg、Mn、Fe及Cu等6种矿质元素含量变异丰富，其中以Fe元素的含量（平均值为2.12 mg·100g-1）和变异系数（26.99％）最高，进一步筛选高铁性状单株的潜力很大；③从新疆野生樱桃李12个实生株系中共鉴定出醇类、醛类、酯类、酮类、烃类及杂环类等6类83种挥发性化合物，各实生株系挥发性化合物总含量、挥发性化合物种类及其含量以及主要挥发性化合物分离比率与含量等存在广泛的遗传变异，遗传多样性较为丰富，其中以甲酸己酯含量最高（平均值为4.33 μg·g-1），是野生樱桃李果实香气形成的重要特征性化合物。

The experimental results showed that the com- bining ability was different among characters of different parents.Early maturity of cucumber was controlled by nonadditive effect.

试验表明：不同亲本间各性状的配合力有差异；早熟性以非加性遗传为主，狭义遗传力较低，总产量、雌花节率以加性遗传为主；群体雌花开放期主要取决于基因型。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。