遗传特性

This study focused on characteristics related to the reproductive biology of Cyathea podophylla Copel. gametophytes, including growth habits, sexual expression, antheridiogen, ploidy, and genetic load.

本文著重於与鬼桫椤配子体繁殖有关之各种特性的研究，如生长习性，配子器发生顺序，促精素，倍体性，及遗传负荷等。

The object function of IGM(1,1) is unable to be gained by classical optimization approaches due to its discontinuousness and non-differentiability. We design a genetic algorithm for IGM(1,1) based on its characteristics and test the algorithm with an example. The result acquired shows that the simulation precision of IGM(1,1) model is much higher than that of GM(1,1) mode

由于IGM(1，1)目标函数非连续，不可导，用传统的优化无法求解，本文针对IGM(1，1)模型的特性设计了求解该优化模型的遗传算法并进行了算例验证，求解结果表明了IGM(1，1)模型的模拟精度远高于GM(1，1)模型。

Seed properties and genetic diversity among different lines of Glycyrrhiza uralensis were studied.

试验研究了8个甘草不同品系种子的特征、特性及其遗传多样性。

The results showed that autote traploid rice might be effectively improved by ion beam bio-technique, from which the new germplasm with hereditable twin-embryo seedling could be selected.

结果表明，利用离子注入技术可以对同源四倍体水稻进行有效地改良，由此可以获得具有遗传变异特点的新种质，其双胚苗特性随着自交世代的推进而得到保持。

METHODS: The morphological architectures of three HCC cell lines with the identical genetic background and different property of metastasis, including SW620, SW480 (hematogenous and lymphangitic metastasis) and SW480/M, were observed by light microscopy and atomic force microscopy, and the expression of carcinoembryonic antigen, CD44v5, Fascin and proliferating cell nuclear antigen in those cell lines were detected by immunohistochemical method.

对3种遗传背景一致，具有不同转移特性的大肠癌细胞株SW620、SW480SW480/M细胞的形态结构进行原子力显微镜和光镜观察，以及应用免疫组化技术检测CEA、CD44、Fascin、PCNA在3种细胞的表达。

RFLP genetic linkage map of wheat recombinant inbred lines derived from W7984 Opata,was used to study QTL of 33 traits associated with water use efficiency.Compared with QTL map of 7 group homeologues chromosomes,the results were showed as follows:nearby the centromeric region of 1A and 1B chromosome,the gene cluster of controlling photosynthetic and root traits were located.

我们利用W7984 Opata重组近交系的RFLP作图群体，对33个与小麦水分利用效率有关的性状进行了QTL遗传图谱比较分析，结果显明：在第一部分同源群染色体（1A，1B）上的着丝粒周围，分布有控制光合作用和根系特性的基因簇。

Photooxidative characteristics and physiological mechanism in leaves of super high yielding hybrid rice Peiai 64S/E32 and its parental lines were investigated by photooxidative treatment mediated with 200 μmol/L of exogenous methyl viologen under a PPFD of 2 000 μmol·m -2 ·s -1 for 1 h.

结果表明相对于含有粳稻成分的母本和高产子代而言，籼稻父本是光氧化敏感型，而子代超高产水稻耐光氧化的特性主要受含粳稻成分的籼稻母本的遗传控制。

The description in growth characters and genetic variation of 7 new clones of Populus Deltoides is given in this paper.

本文对美洲黑杨7个新无性系在水培条件下的生长特性和遗传变异规律详细地进行了描述。

The mechanism of triploid seedlessness, evaluation approaches of triploid grapes and embryo rescue technique are also discussed. Seven newly bred triploid seedless cultivars in the world are briefly described such as Yileyi, King Dela, Honey Seedless, Kai Mi...

简要介绍了国内外育成的7个三倍体无核葡萄新品种尾玲、戴拉王、蜜无核、美嶺、夏黑、无核早红和马格拉契的特征特性，并讨论了三倍体无核葡萄育种存在问题和未来的研究重点如杂交亲本的选择、三倍体杂合胚的发育特点和无核性状的遗传规律等。

The holistic design of the system and resolved the designs of software and hardware based on VXI bus are put forward according to the demand of test system. The hardware and software is designed, including the formation and design of hardware system, visual instrument software architecture, program design for instrument driver, high speed real-time data collection. In the dynamic test program, the idea of"software is instrument"was applied to meet the diverse test demands. Last, it is proposed that the VXI test system be developed to more totalization and networked. The basic theory of system identification was introduced briefly at first. The principle of spectrum analysis system identification based on Wiener-Hopf equation was expatiated. and the questions in applying Peusdo Random signal as spectrum analysis methods stimulate signal was studied, The generation principle of the peusdo random signal is researched, the characteristic of peusdo random are analyzed from time domain and frequency domain, the inverse repeat peusdo random signal is brought forward to make up the shortage of ordinary peusdo random signal. And a new chaos genetic algorithmis presented to solve the unprecise problem of the traditional method. In the servo valve dynamic characteristic test system, the spectrum analysis methods was applied successfully, the servo valve dynamic characteristic could be acquired rapidly and exactly, the test results were analyzed and the ameliorate methods were brought forward at last.

结合航天某集团液压测试中心测试系统的需求，提出了基于VXI总线的液压测试系统的整体设计方案，完成了测试系统的硬件设计与软件设计，包括硬件系统构成与设计、虚拟仪器软件结构、仪器驱动程序设计、高速同步实时数据采集等内容；以伺服阀动态特性测试为例设计了测试模块，该模块体现了VXI总线仪器软件开发所倡导的&虚拟仪器&的思想，以软件的灵活应用满足了不同的测试需求；结合自动测试系统的发展，研究了VXI测试系统与网络技术结合，实现各种软硬件资源共享，进一步提高设备及数据的利用率和系统的扩展性，使自动测试向综合化、网络化方向发展；研究了伪随机信号作为谱分析法辨识的激励信号时存在的问题，讨论了伪随机信号的产生机理，从频域和时域分析了伪随机信号的性质及其应用，提出了用逆重复伪随机信号弥补了普通伪随机信号的不足，并以混沌遗传算法对逆重复伪随机信号产生过程中的参数进行优化，可以更合理而不是凭经验产生需要的逆重复伪随机信号。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。