遗传影响

Five translocated populations harboured 1,3 or 5 monomorphic loci respectively,while no monomorphic locus in the source population.

结果表明，奠基者效应导致种群的遗传多样性水平较低，并且对于不同迁地种群，影响也不相同。

When the oppositifolious character is in different genetic background, the process and efficiency of orientational selection is different.

通过F4代的26个转育的对生自交系进行对生性状的连续10代定向选择，以及三种不同的组配方式（对生×互生、对生×对生、互生×互生）对对生率的影响的研究，结果表明：连续定向选择是获得稳定对生系是一种有效的技术途径，对生性状在不同的遗传背景下，其定向选择的进程和效率是不同的。

But they added that the genotoxic and phenotypic effects clearly require further studies ...

&但他们又说，&遗传和表型的影响显然需要进一步的研究。。。

The effects of chlorine dioxide dosage and reaction time on the acute toxicity and genotoxicity of wastewater after chlorine dioxide disinfection were studied using photobacterium bioassay and umu test.

采用发光细菌试验和umu试验，分别考察了二氧化氯投加量和反应时间对污水二氧化氯消毒后急性毒性和遗传毒性变化的影响。

In bud stage of mustards ecotype Xuelihong and Yuanyejie were transformed with in planta vacuum infiltration by an Agrobacterium tumefaciens strain GV3101 carrying hy-gromycin resistance gene. Effects of different factors on transformation frequency with in planta vacuum infiltration were studied.

以蕾期的芥菜生态型雪里蕻和圆叶芥为试材，在携带潮霉素磷酸转移酶标记基因的根癌农杆菌菌株GV3101的介导下，对影响芥菜植株原位真空渗入遗传转化效果的真空渗入时间、根癌农杆菌悬浮孢子的浓度、渗入培养基、感染方式以及根癌农杆菌菌株等进行研究。

Occurrence records from 1864 locations and 34 environmental variables from Daymet datasets were gathered, four modeling methods including Logistic Regression, Classification and Regression Trees, Genetic Algorithm for Rule-Set Prediction and maximum entropy method were used to generate potential geographic distributions for Dreissena polymorpha in the continental USA. Then three statistical criteria including area under the Receiver Operating Characteristic curve, correlation and Kappa were calculated to evaluate the performance of the models, followed by analyses of major variable contributions.

论文以1864个美国外来入侵物种斑马纹贻贝定点发生数据和开放式基础地理信息数据库Daymet的34个环境变量为主要信息源，采用逻辑斯蒂回归、分类与回归树模型、基于规则的遗传算法、最大熵法4种途径，建立美国大陆部分潜在生境预测模型，从接受者运行特征曲线下面积、Pearson相关系数、Kappa值3个方面来检验模型预测精度，在此基础上分析斑马纹贻贝的空间分布规律及其环境影响因素。

The results showed that, using transient GUS expression, the frequency of resistant calli and shoot differentiation as a criteria, wheat mature embryos were cultured on the preculture medium of CM4C1P for 14 days, and immersed in inoculation suspension Ⅰ for 3 hours, then the explants were co-cultured under desiccation conditions for 3 days, which was optimal conditions for Agrobacterium-mediated transformation of wheat mature embryos.

为了进一步完善根癌农杆菌介导的小麦遗传转化体系，以小麦成熟胚为转化受体，研究了根癌农杆菌介导法转化小麦的主要影响因素，结果表明，以gus基因瞬时表达率、抗性愈伤组织获得率和分化率为转化指标，小麦成熟胚在预培养基CM4C1P上预培养14d后，用侵染培养液Ⅰ侵染3h，再经干燥共培养方式处理3d，是根癌农杆菌介导成熟胚转化的合适条件。

A species can become threatened or endangered because of a number of factors:"presentor threatened destruction, modification or curtailment of its habitat or range; over-utilization for commercial recreation, scientific, or educational purposes; disease or predation, the inadequacy of existing statutory mechanisms; or other natural or man-made factors affecting its continued existence."

一个物种会遭受威胁和面临危险时由多种因素造成的：现实的或充满威胁的破坏；改变或剥夺它们的栖息地，为了商业娱乐科研的或教育的目的而过度利用；在疾病或者遗传方面，现存法定机制的不完善；或其他影响其继续生存的自然或人为的原因。

AIM:To study the effects of dibutyl phthalate on the procreant ability and its genotoxity in male Drosophila melanogaster.

目的：研究邻苯二甲酸二丁酯（dinbutyl phthalate，DBP）对雄性果蝇生殖能力的影响及其遗传毒性。

Objective To explore the genetic and environmental influence on sexual characteristics of pubertal girls,and to provide evidence for the further study.

目的 探讨遗传与环境因素对女性青春期性征发育的影响，为进一步深入研究女性青春期发育提供依据。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。