查询词典 genetic

Tranditional approaches like crop-dusting to defend this desease shall make environmental-polluting.At present, cultivating virus resistant rice by genetic engineering is one of the methond to solve this contradiction.

传统的防治方法如喷洒农药等往往会造成环境及食品的污染，效果也不能持久，而传统的育种方式也很难满足生产的需要。

Research and Application of Multivariate Genetic Analysis in the Field of Crop ...

着重阐明了它在作物遗传育种领域中的地位和作用，并对存在的问题作了讨论。

On the base of Simple Genetic Algorithms, ranking every generation's fitness, and add the function which can control the cross rate and mutation rate. This way not only can overcome the SGA's slowly speed of constringing and bad stability, but also can improve the effect of optimizing function.

该方法在简单遗传算法的基础上，将每一代染色体的适应度排序，并添加了交叉率和变异率的自适应控制函数，既克服了简单遗传算法收敛速度慢，稳定性差的缺点，又改善了函数优化效果。

Its contents are as follow: A description for the characteristics of Agropyron elongatum and its genome; the methods used to overcome the cross-sterility and hybrid sterility; the cross breeding procedure and the genetic analysis for it; the selected hybrids which are the Triticum-Agropyron octoploid species, the alien addition lines, the alien substitution lin...

内容介绍了长穗偃麦草的特性和染色体组型，克服杂交不育和杂种不育的方法，杂交育种的程序及其遗传分析和选出的小偃麦八倍体种、异附加系、异代换系与丰产抗病的小偃麦新品种。

Thus,it is important that elucidate the genetic control of the crossability of Chinese tetraploid wheat with rye.

因此，研究中国四倍体小麦的亲和性问题具有特殊的意义。

KL has been used as a 'bridge' of genetic transfer due to its new recessive ph gene, high crossability and capability of rescue culture.

小麦地方品种"开县罗汉麦"具有新隐性ph基因，且远缘杂交亲和性和胚培出苗率高。

Also crops are being crossbred to grow larger and faster without genetic modifications; and this too leads to a harvest that is lacking in nutrition in present time.

没有被修改基因的农作物也正被杂交到生长得更大、更快，在当代这也导致一场缺乏营养的收获。

In order to correct the locality and partiality in the classical analysis method for investment, a genetic algorithm used in short-term stock investment analysis is proposed. Significance of chromosome, adapt value parameter in the stock market is explained and an applied scheme of selection, crossbreed, and variation operator is designed.

针对传统投资分析方法的局限性和一定程度的片面性，提出将遗传算法运用于股票短期投资分析，具体解释了染色体、适应值等参数在股市分析中的实际意义，并设计了选择、杂交、变异算子的使用方案，同时改进了算法——提出"伸展算子"。

Note that artificial selection involves crossbreeding between genetic varieties of the same species and thus is not a form of speciation.

请注意，人工选择涉及杂交品种间的遗传相同的物种，因而不是一种形态。

And so, the genetic progress of reproductive traits only depended on crossbreeding in the past years.

传统的数量遗传学在指导家畜育种中起到了重要的作用，但是繁殖性状遗传力低、性状表现晚、而且是限性遗传，通过常规选择难以有所进展。

Metrorrhagia is also gynaecological problems of common diseases.

崩漏是妇科常见病也是疑难症。

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wordftp让您的方便和省时您所需要的。